[svn-r17155] Description:

	Bring r17154 from 'revise_chunks' branch to trunk:

	Add fixed array data structure.  (For initial use as a chunk index)

Tested on:
        FreeBSD/32 6.3 (duty) in debug mode
        FreeBSD/64 6.3 (liberty) w/C++ & FORTRAN, in debug mode
        Linux/32 2.6 (jam) w/PGI compilers, w/C++ & FORTRAN, w/threadsafe,
                                in debug mode
        Linux/64-amd64 2.6 (smirom) w/Intel compilers w/default API=1.6.x,
                                w/C++ & FORTRAN, in production mode
        Solaris/32 2.10 (linew) w/deprecated symbols disabled, w/C++ & FORTRAN,
                                w/szip filter, in production mode
        Linux/64-ia64 2.6 (cobalt) w/Intel compilers, w/C++ & FORTRAN,
                                in production mode
        Linux/64-ia64 2.4 (tg-login3) w/parallel, w/FORTRAN, in debug mode
        Linux/64-amd64 2.6 (abe) w/parallel, w/FORTRAN, in production mode
        Mac OS X/32 10.5.7 (amazon) in debug mode
        Mac OS X/32 10.5.7 (amazon) w/C++ & FORTRAN, w/threadsafe,
                                in production mode

22 files changed, 4410 insertions, 102 deletions

diff --git a/src/H5AC.c b/src/H5AC.c
index 17ae55f..a01543c 100644
--- a/src/H5AC.c
+++ b/src/H5AC.c
@@ -496,6 +496,9 @@ static const char * H5AC_entry_type_names[H5AC_NTYPES] =
     "extensible array super blocks",
     "extensible array data blocks",
     "extensible array data block pages",
+    "fixed array headers",
+    "fixed array data block",
+    "fixed array data block pages",
     "test entry"	/* for testing only -- not used for actual files */
 };
 
diff --git a/src/H5ACprivate.h b/src/H5ACprivate.h
index 6bf1afe..17ee012 100644
--- a/src/H5ACprivate.h
+++ b/src/H5ACprivate.h
@@ -67,6 +67,9 @@ typedef enum {
     H5AC_EARRAY_SBLOCK_ID, /*extensible array super block	     */
     H5AC_EARRAY_DBLOCK_ID, /*extensible array data block	     */
     H5AC_EARRAY_DBLK_PAGE_ID, /*extensible array data block page     */
+    H5AC_FARRAY_HDR_ID,	/*fixed array header		     	     */
+    H5AC_FARRAY_DBLOCK_ID, /*fixed array data block	     	     */
+    H5AC_FARRAY_DBLK_PAGE_ID, /*fixed array data block page          */
     H5AC_TEST_ID,	/*test entry -- not used for actual files    */
     H5AC_NTYPES		/* Number of types, must be last             */
 } H5AC_type_t;
diff --git a/src/H5Cpkg.h b/src/H5Cpkg.h
index 5e7b1a7..08a903a 100644
--- a/src/H5Cpkg.h
+++ b/src/H5Cpkg.h
@@ -857,7 +857,7 @@
  ****************************************************************************/
 
 #define H5C__H5C_T_MAGIC	0x005CAC0E
-#define H5C__MAX_NUM_TYPE_IDS	21
+#define H5C__MAX_NUM_TYPE_IDS	24
 #define H5C__PREFIX_LEN		32
 
 struct H5C_t
diff --git a/src/H5Edefin.h b/src/H5Edefin.h
index adaaa3a..16e922a 100644
--- a/src/H5Edefin.h
+++ b/src/H5Edefin.h
@@ -21,9 +21,7 @@
 #define _H5Edefin_H
 
 /* Major error IDs */
-hid_t H5E_DATASET_g        = FAIL;      /* Dataset */
 hid_t H5E_FUNC_g           = FAIL;      /* Function entry/exit */
-hid_t H5E_STORAGE_g        = FAIL;      /* Data storage */
 hid_t H5E_FILE_g           = FAIL;      /* File accessability */
 hid_t H5E_SOHM_g           = FAIL;      /* Shared Object Header Messages */
 hid_t H5E_SYM_g            = FAIL;      /* Symbol table */
@@ -33,24 +31,27 @@ hid_t H5E_BTREE_g          = FAIL;      /* B-Tree node */
 hid_t H5E_REFERENCE_g      = FAIL;      /* References */
 hid_t H5E_DATASPACE_g      = FAIL;      /* Dataspace */
 hid_t H5E_RESOURCE_g       = FAIL;      /* Resource unavailable */
-hid_t H5E_PLIST_g          = FAIL;      /* Property lists */
-hid_t H5E_LINK_g           = FAIL;      /* Links */
-hid_t H5E_DATATYPE_g       = FAIL;      /* Datatype */
 hid_t H5E_RS_g             = FAIL;      /* Reference Counted Strings */
+hid_t H5E_FARRAY_g         = FAIL;      /* Fixed Array */
 hid_t H5E_HEAP_g           = FAIL;      /* Heap */
-hid_t H5E_OHDR_g           = FAIL;      /* Object header */
-hid_t H5E_ATOM_g           = FAIL;      /* Object atom */
 hid_t H5E_ATTR_g           = FAIL;      /* Attribute */
-hid_t H5E_NONE_MAJOR_g     = FAIL;      /* No error */
 hid_t H5E_IO_g             = FAIL;      /* Low-level I/O */
-hid_t H5E_SLIST_g          = FAIL;      /* Skip Lists */
 hid_t H5E_EFL_g            = FAIL;      /* External file list */
 hid_t H5E_TST_g            = FAIL;      /* Ternary Search Trees */
+hid_t H5E_FSPACE_g         = FAIL;      /* Free Space Manager */
+hid_t H5E_DATASET_g        = FAIL;      /* Dataset */
+hid_t H5E_STORAGE_g        = FAIL;      /* Data storage */
+hid_t H5E_LINK_g           = FAIL;      /* Links */
+hid_t H5E_PLIST_g          = FAIL;      /* Property lists */
+hid_t H5E_DATATYPE_g       = FAIL;      /* Datatype */
+hid_t H5E_OHDR_g           = FAIL;      /* Object header */
+hid_t H5E_ATOM_g           = FAIL;      /* Object atom */
+hid_t H5E_NONE_MAJOR_g     = FAIL;      /* No error */
+hid_t H5E_SLIST_g          = FAIL;      /* Skip Lists */
 hid_t H5E_ARGS_g           = FAIL;      /* Invalid arguments to routine */
 hid_t H5E_EARRAY_g         = FAIL;      /* Extensible Array */
-hid_t H5E_ERROR_g          = FAIL;      /* Error API */
 hid_t H5E_PLINE_g          = FAIL;      /* Data filters */
-hid_t H5E_FSPACE_g         = FAIL;      /* Free Space Manager */
+hid_t H5E_ERROR_g          = FAIL;      /* Error API */
 hid_t H5E_CACHE_g          = FAIL;      /* Object cache */
 
 /* Minor error IDs */
diff --git a/src/H5Einit.h b/src/H5Einit.h
index a9f95b7..cea2888 100644
--- a/src/H5Einit.h
+++ b/src/H5Einit.h
@@ -24,21 +24,11 @@
 /* Major error codes */
 /*********************/
 
-assert(H5E_DATASET_g==(-1));
-if((msg = H5E_create_msg(cls, H5E_MAJOR, "Dataset"))==NULL)
-    HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
-if((H5E_DATASET_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
-    HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error message")
 assert(H5E_FUNC_g==(-1));
 if((msg = H5E_create_msg(cls, H5E_MAJOR, "Function entry/exit"))==NULL)
     HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
 if((H5E_FUNC_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
     HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error message")
-assert(H5E_STORAGE_g==(-1));
-if((msg = H5E_create_msg(cls, H5E_MAJOR, "Data storage"))==NULL)
-    HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
-if((H5E_STORAGE_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
-    HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error message")
 assert(H5E_FILE_g==(-1));
 if((msg = H5E_create_msg(cls, H5E_MAJOR, "File accessability"))==NULL)
     HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
@@ -84,31 +74,71 @@ if((msg = H5E_create_msg(cls, H5E_MAJOR, "Resource unavailable"))==NULL)
     HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
 if((H5E_RESOURCE_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
     HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error message")
-assert(H5E_PLIST_g==(-1));
-if((msg = H5E_create_msg(cls, H5E_MAJOR, "Property lists"))==NULL)
+assert(H5E_RS_g==(-1));
+if((msg = H5E_create_msg(cls, H5E_MAJOR, "Reference Counted Strings"))==NULL)
     HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
-if((H5E_PLIST_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
+if((H5E_RS_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
+    HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error message")
+assert(H5E_FARRAY_g==(-1));
+if((msg = H5E_create_msg(cls, H5E_MAJOR, "Fixed Array"))==NULL)
+    HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
+if((H5E_FARRAY_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
+    HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error message")
+assert(H5E_HEAP_g==(-1));
+if((msg = H5E_create_msg(cls, H5E_MAJOR, "Heap"))==NULL)
+    HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
+if((H5E_HEAP_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
+    HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error message")
+assert(H5E_ATTR_g==(-1));
+if((msg = H5E_create_msg(cls, H5E_MAJOR, "Attribute"))==NULL)
+    HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
+if((H5E_ATTR_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
+    HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error message")
+assert(H5E_IO_g==(-1));
+if((msg = H5E_create_msg(cls, H5E_MAJOR, "Low-level I/O"))==NULL)
+    HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
+if((H5E_IO_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
+    HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error message")
+assert(H5E_EFL_g==(-1));
+if((msg = H5E_create_msg(cls, H5E_MAJOR, "External file list"))==NULL)
+    HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
+if((H5E_EFL_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
+    HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error message")
+assert(H5E_TST_g==(-1));
+if((msg = H5E_create_msg(cls, H5E_MAJOR, "Ternary Search Trees"))==NULL)
+    HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
+if((H5E_TST_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
+    HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error message")
+assert(H5E_FSPACE_g==(-1));
+if((msg = H5E_create_msg(cls, H5E_MAJOR, "Free Space Manager"))==NULL)
+    HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
+if((H5E_FSPACE_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
+    HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error message")
+assert(H5E_DATASET_g==(-1));
+if((msg = H5E_create_msg(cls, H5E_MAJOR, "Dataset"))==NULL)
+    HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
+if((H5E_DATASET_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
+    HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error message")
+assert(H5E_STORAGE_g==(-1));
+if((msg = H5E_create_msg(cls, H5E_MAJOR, "Data storage"))==NULL)
+    HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
+if((H5E_STORAGE_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
     HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error message")
 assert(H5E_LINK_g==(-1));
 if((msg = H5E_create_msg(cls, H5E_MAJOR, "Links"))==NULL)
     HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
 if((H5E_LINK_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
     HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error message")
+assert(H5E_PLIST_g==(-1));
+if((msg = H5E_create_msg(cls, H5E_MAJOR, "Property lists"))==NULL)
+    HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
+if((H5E_PLIST_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
+    HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error message")
 assert(H5E_DATATYPE_g==(-1));
 if((msg = H5E_create_msg(cls, H5E_MAJOR, "Datatype"))==NULL)
     HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
 if((H5E_DATATYPE_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
     HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error message")
-assert(H5E_RS_g==(-1));
-if((msg = H5E_create_msg(cls, H5E_MAJOR, "Reference Counted Strings"))==NULL)
-    HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
-if((H5E_RS_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
-    HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error message")
-assert(H5E_HEAP_g==(-1));
-if((msg = H5E_create_msg(cls, H5E_MAJOR, "Heap"))==NULL)
-    HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
-if((H5E_HEAP_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
-    HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error message")
 assert(H5E_OHDR_g==(-1));
 if((msg = H5E_create_msg(cls, H5E_MAJOR, "Object header"))==NULL)
     HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
@@ -119,36 +149,16 @@ if((msg = H5E_create_msg(cls, H5E_MAJOR, "Object atom"))==NULL)
     HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
 if((H5E_ATOM_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
     HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error message")
-assert(H5E_ATTR_g==(-1));
-if((msg = H5E_create_msg(cls, H5E_MAJOR, "Attribute"))==NULL)
-    HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
-if((H5E_ATTR_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
-    HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error message")
 assert(H5E_NONE_MAJOR_g==(-1));
 if((msg = H5E_create_msg(cls, H5E_MAJOR, "No error"))==NULL)
     HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
 if((H5E_NONE_MAJOR_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
     HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error message")
-assert(H5E_IO_g==(-1));
-if((msg = H5E_create_msg(cls, H5E_MAJOR, "Low-level I/O"))==NULL)
-    HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
-if((H5E_IO_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
-    HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error message")
 assert(H5E_SLIST_g==(-1));
 if((msg = H5E_create_msg(cls, H5E_MAJOR, "Skip Lists"))==NULL)
     HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
 if((H5E_SLIST_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
     HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error message")
-assert(H5E_EFL_g==(-1));
-if((msg = H5E_create_msg(cls, H5E_MAJOR, "External file list"))==NULL)
-    HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
-if((H5E_EFL_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
-    HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error message")
-assert(H5E_TST_g==(-1));
-if((msg = H5E_create_msg(cls, H5E_MAJOR, "Ternary Search Trees"))==NULL)
-    HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
-if((H5E_TST_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
-    HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error message")
 assert(H5E_ARGS_g==(-1));
 if((msg = H5E_create_msg(cls, H5E_MAJOR, "Invalid arguments to routine"))==NULL)
     HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
@@ -159,20 +169,15 @@ if((msg = H5E_create_msg(cls, H5E_MAJOR, "Extensible Array"))==NULL)
     HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
 if((H5E_EARRAY_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
     HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error message")
-assert(H5E_ERROR_g==(-1));
-if((msg = H5E_create_msg(cls, H5E_MAJOR, "Error API"))==NULL)
-    HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
-if((H5E_ERROR_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
-    HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error message")
 assert(H5E_PLINE_g==(-1));
 if((msg = H5E_create_msg(cls, H5E_MAJOR, "Data filters"))==NULL)
     HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
 if((H5E_PLINE_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
     HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error message")
-assert(H5E_FSPACE_g==(-1));
-if((msg = H5E_create_msg(cls, H5E_MAJOR, "Free Space Manager"))==NULL)
+assert(H5E_ERROR_g==(-1));
+if((msg = H5E_create_msg(cls, H5E_MAJOR, "Error API"))==NULL)
     HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "error message initialization failed")
-if((H5E_FSPACE_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
+if((H5E_ERROR_g = H5I_register(H5I_ERROR_MSG, msg, FALSE))<0)
     HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error message")
 assert(H5E_CACHE_g==(-1));
 if((msg = H5E_create_msg(cls, H5E_MAJOR, "Object cache"))==NULL)
diff --git a/src/H5Epubgen.h b/src/H5Epubgen.h
index 3debf20..999ea61 100644
--- a/src/H5Epubgen.h
+++ b/src/H5Epubgen.h
@@ -24,9 +24,7 @@
 /* Major error codes */
 /*********************/
 
-#define H5E_DATASET          (H5OPEN H5E_DATASET_g)
 #define H5E_FUNC             (H5OPEN H5E_FUNC_g)
-#define H5E_STORAGE          (H5OPEN H5E_STORAGE_g)
 #define H5E_FILE             (H5OPEN H5E_FILE_g)
 #define H5E_SOHM             (H5OPEN H5E_SOHM_g)
 #define H5E_SYM              (H5OPEN H5E_SYM_g)
@@ -36,28 +34,29 @@
 #define H5E_REFERENCE        (H5OPEN H5E_REFERENCE_g)
 #define H5E_DATASPACE        (H5OPEN H5E_DATASPACE_g)
 #define H5E_RESOURCE         (H5OPEN H5E_RESOURCE_g)
-#define H5E_PLIST            (H5OPEN H5E_PLIST_g)
-#define H5E_LINK             (H5OPEN H5E_LINK_g)
-#define H5E_DATATYPE         (H5OPEN H5E_DATATYPE_g)
 #define H5E_RS               (H5OPEN H5E_RS_g)
+#define H5E_FARRAY           (H5OPEN H5E_FARRAY_g)
 #define H5E_HEAP             (H5OPEN H5E_HEAP_g)
-#define H5E_OHDR             (H5OPEN H5E_OHDR_g)
-#define H5E_ATOM             (H5OPEN H5E_ATOM_g)
 #define H5E_ATTR             (H5OPEN H5E_ATTR_g)
-#define H5E_NONE_MAJOR       (H5OPEN H5E_NONE_MAJOR_g)
 #define H5E_IO               (H5OPEN H5E_IO_g)
-#define H5E_SLIST            (H5OPEN H5E_SLIST_g)
 #define H5E_EFL              (H5OPEN H5E_EFL_g)
 #define H5E_TST              (H5OPEN H5E_TST_g)
+#define H5E_FSPACE           (H5OPEN H5E_FSPACE_g)
+#define H5E_DATASET          (H5OPEN H5E_DATASET_g)
+#define H5E_STORAGE          (H5OPEN H5E_STORAGE_g)
+#define H5E_LINK             (H5OPEN H5E_LINK_g)
+#define H5E_PLIST            (H5OPEN H5E_PLIST_g)
+#define H5E_DATATYPE         (H5OPEN H5E_DATATYPE_g)
+#define H5E_OHDR             (H5OPEN H5E_OHDR_g)
+#define H5E_ATOM             (H5OPEN H5E_ATOM_g)
+#define H5E_NONE_MAJOR       (H5OPEN H5E_NONE_MAJOR_g)
+#define H5E_SLIST            (H5OPEN H5E_SLIST_g)
 #define H5E_ARGS             (H5OPEN H5E_ARGS_g)
 #define H5E_EARRAY           (H5OPEN H5E_EARRAY_g)
-#define H5E_ERROR            (H5OPEN H5E_ERROR_g)
 #define H5E_PLINE            (H5OPEN H5E_PLINE_g)
-#define H5E_FSPACE           (H5OPEN H5E_FSPACE_g)
+#define H5E_ERROR            (H5OPEN H5E_ERROR_g)
 #define H5E_CACHE            (H5OPEN H5E_CACHE_g)
-H5_DLLVAR hid_t H5E_DATASET_g;       /* Dataset */
 H5_DLLVAR hid_t H5E_FUNC_g;          /* Function entry/exit */
-H5_DLLVAR hid_t H5E_STORAGE_g;       /* Data storage */
 H5_DLLVAR hid_t H5E_FILE_g;          /* File accessability */
 H5_DLLVAR hid_t H5E_SOHM_g;          /* Shared Object Header Messages */
 H5_DLLVAR hid_t H5E_SYM_g;           /* Symbol table */
@@ -67,24 +66,27 @@ H5_DLLVAR hid_t H5E_BTREE_g;         /* B-Tree node */
 H5_DLLVAR hid_t H5E_REFERENCE_g;     /* References */
 H5_DLLVAR hid_t H5E_DATASPACE_g;     /* Dataspace */
 H5_DLLVAR hid_t H5E_RESOURCE_g;      /* Resource unavailable */
-H5_DLLVAR hid_t H5E_PLIST_g;         /* Property lists */
-H5_DLLVAR hid_t H5E_LINK_g;          /* Links */
-H5_DLLVAR hid_t H5E_DATATYPE_g;      /* Datatype */
 H5_DLLVAR hid_t H5E_RS_g;            /* Reference Counted Strings */
+H5_DLLVAR hid_t H5E_FARRAY_g;        /* Fixed Array */
 H5_DLLVAR hid_t H5E_HEAP_g;          /* Heap */
-H5_DLLVAR hid_t H5E_OHDR_g;          /* Object header */
-H5_DLLVAR hid_t H5E_ATOM_g;          /* Object atom */
 H5_DLLVAR hid_t H5E_ATTR_g;          /* Attribute */
-H5_DLLVAR hid_t H5E_NONE_MAJOR_g;    /* No error */
 H5_DLLVAR hid_t H5E_IO_g;            /* Low-level I/O */
-H5_DLLVAR hid_t H5E_SLIST_g;         /* Skip Lists */
 H5_DLLVAR hid_t H5E_EFL_g;           /* External file list */
 H5_DLLVAR hid_t H5E_TST_g;           /* Ternary Search Trees */
+H5_DLLVAR hid_t H5E_FSPACE_g;        /* Free Space Manager */
+H5_DLLVAR hid_t H5E_DATASET_g;       /* Dataset */
+H5_DLLVAR hid_t H5E_STORAGE_g;       /* Data storage */
+H5_DLLVAR hid_t H5E_LINK_g;          /* Links */
+H5_DLLVAR hid_t H5E_PLIST_g;         /* Property lists */
+H5_DLLVAR hid_t H5E_DATATYPE_g;      /* Datatype */
+H5_DLLVAR hid_t H5E_OHDR_g;          /* Object header */
+H5_DLLVAR hid_t H5E_ATOM_g;          /* Object atom */
+H5_DLLVAR hid_t H5E_NONE_MAJOR_g;    /* No error */
+H5_DLLVAR hid_t H5E_SLIST_g;         /* Skip Lists */
 H5_DLLVAR hid_t H5E_ARGS_g;          /* Invalid arguments to routine */
 H5_DLLVAR hid_t H5E_EARRAY_g;        /* Extensible Array */
-H5_DLLVAR hid_t H5E_ERROR_g;         /* Error API */
 H5_DLLVAR hid_t H5E_PLINE_g;         /* Data filters */
-H5_DLLVAR hid_t H5E_FSPACE_g;        /* Free Space Manager */
+H5_DLLVAR hid_t H5E_ERROR_g;         /* Error API */
 H5_DLLVAR hid_t H5E_CACHE_g;         /* Object cache */
 
 /*********************/
diff --git a/src/H5Eterm.h b/src/H5Eterm.h
index ecad437..0997990 100644
--- a/src/H5Eterm.h
+++ b/src/H5Eterm.h
@@ -22,9 +22,7 @@
 
 /* Reset major error IDs */
     
-H5E_DATASET_g=    
 H5E_FUNC_g=    
-H5E_STORAGE_g=    
 H5E_FILE_g=    
 H5E_SOHM_g=    
 H5E_SYM_g=    
@@ -34,24 +32,27 @@ H5E_BTREE_g=
 H5E_REFERENCE_g=    
 H5E_DATASPACE_g=    
 H5E_RESOURCE_g=    
-H5E_PLIST_g=    
-H5E_LINK_g=    
-H5E_DATATYPE_g=    
 H5E_RS_g=    
+H5E_FARRAY_g=    
 H5E_HEAP_g=    
-H5E_OHDR_g=    
-H5E_ATOM_g=    
 H5E_ATTR_g=    
-H5E_NONE_MAJOR_g=    
 H5E_IO_g=    
-H5E_SLIST_g=    
 H5E_EFL_g=    
 H5E_TST_g=    
+H5E_FSPACE_g=    
+H5E_DATASET_g=    
+H5E_STORAGE_g=    
+H5E_LINK_g=    
+H5E_PLIST_g=    
+H5E_DATATYPE_g=    
+H5E_OHDR_g=    
+H5E_ATOM_g=    
+H5E_NONE_MAJOR_g=    
+H5E_SLIST_g=    
 H5E_ARGS_g=    
 H5E_EARRAY_g=    
-H5E_ERROR_g=    
 H5E_PLINE_g=    
-H5E_FSPACE_g=    
+H5E_ERROR_g=    
 H5E_CACHE_g= (-1);
 
 /* Reset minor error IDs */
diff --git a/src/H5FA.c b/src/H5FA.c
new file mode 100644
index 0000000..a8cd36b
--- /dev/null
+++ b/src/H5FA.c
@@ -0,0 +1,704 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*-------------------------------------------------------------------------
+ *
+ * Created:		H5FA.c
+ *			April 2009
+ *			Vailin Choi <vchoi@hdfgroup.org>
+ *
+ * Purpose:		Implements a Fixed Array for storing elements
+ *                      of datasets with fixed dimensions
+ *
+ *-------------------------------------------------------------------------
+ */
+
+/**********************/
+/* Module Declaration */
+/**********************/
+
+#define H5FA_MODULE 
+
+/***********************/
+/* Other Packages Used */
+/***********************/
+
+
+/***********/
+/* Headers */
+/***********/
+#include "H5private.h"		/* Generic Functions			*/
+#include "H5Eprivate.h"		/* Error handling		  	*/
+#include "H5FApkg.h"		/* Fixed Arrays				*/
+#include "H5FLprivate.h"	/* Free Lists                           */
+#include "H5Vprivate.h"         /* Vector functions			*/
+
+
+/****************/
+/* Local Macros */
+/****************/
+
+
+/******************/
+/* Local Typedefs */
+/******************/
+
+
+/********************/
+/* Package Typedefs */
+/********************/
+
+
+/********************/
+/* Local Prototypes */
+/********************/
+
+
+/*********************/
+/* Package Variables */
+/*********************/
+
+
+/*****************************/
+/* Library Private Variables */
+/*****************************/
+
+
+/*******************/
+/* Local Variables */
+/*******************/
+
+/* Declare a free list to manage the H5FA_t struct */
+H5FL_DEFINE_STATIC(H5FA_t);
+
+/* Declare a PQ free list to manage the element */
+H5FL_BLK_DEFINE(native_elmt);
+
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA_create
+ *
+ * Purpose:	Creates a new fixed array (header) in the file.
+ *
+ * Return:	Pointer to fixed array wrapper on success
+ *              NULL on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PRIV, ERR,
+H5FA_t *, NULL, NULL,
+H5FA_create(H5F_t *f, hid_t dxpl_id, const H5FA_create_t *cparam, void *ctx_udata))
+
+    /* Local variables */
+    H5FA_t *fa = NULL;          /* Pointer to new fixed array */
+    H5FA_hdr_t *hdr = NULL;     /* The fixed array header information */
+    haddr_t fa_addr;            /* Fixed Array header address */
+
+#ifdef H5FA_DEBUG
+HDfprintf(stderr, "%s: Called\n", FUNC);
+#endif /* H5FA_DEBUG */
+
+    /*
+     * Check arguments.
+     */
+    HDassert(f);
+    HDassert(cparam);
+
+    /* Create fixed array header */
+    if(HADDR_UNDEF == (fa_addr = H5FA__hdr_create(f, dxpl_id, cparam, ctx_udata)))
+	H5E_THROW(H5E_CANTINIT, "can't create fixed array header")
+
+    /* Allocate fixed array wrapper */
+    if(NULL == (fa = H5FL_MALLOC(H5FA_t)))
+	H5E_THROW(H5E_CANTALLOC, "memory allocation failed for fixed array info")
+
+    /* Lock the array header into memory */
+    if(NULL == (hdr = (H5FA_hdr_t *)H5AC_protect(f, dxpl_id, H5AC_FARRAY_HDR, fa_addr, cparam->cls, NULL, H5AC_WRITE)))
+	H5E_THROW(H5E_CANTPROTECT, "unable to load fixed array header")
+
+    /* Point fixed array wrapper at header and bump it's ref count */
+    fa->hdr = hdr;
+    if(H5FA__hdr_incr(fa->hdr) < 0)
+	H5E_THROW(H5E_CANTINC, "can't increment reference count on shared array header")
+
+    /* Increment # of files using this array header */
+    if(H5FA__hdr_fuse_incr(fa->hdr) < 0)
+	H5E_THROW(H5E_CANTINC, "can't increment file reference count on shared array header")
+
+    /* Set file pointer for this array open context */
+    fa->f = f;
+
+    /* Set the return value */
+    ret_value = fa;
+
+CATCH
+
+    if(hdr && H5AC_unprotect(f, dxpl_id, H5AC_FARRAY_HDR, fa_addr, hdr, H5AC__NO_FLAGS_SET) < 0)
+	H5E_THROW(H5E_CANTUNPROTECT, "unable to release fixed array header")
+    if(!ret_value)
+        if(fa && H5FA_close(fa, dxpl_id) < 0)
+            H5E_THROW(H5E_CLOSEERROR, "unable to close fixed array")
+
+END_FUNC(PRIV)  /* end H5FA_create() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA_open
+ *
+ * Purpose:	Opens an existing fixed array in the file.
+ *
+ * Return:	Pointer to array wrapper on success
+ *              NULL on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PRIV, ERR,
+H5FA_t *, NULL, NULL,
+H5FA_open(H5F_t *f, hid_t dxpl_id, haddr_t fa_addr, const H5FA_class_t *cls,
+    void *ctx_udata))
+
+    /* Local variables */
+    H5FA_t *fa = NULL;          /* Pointer to new fixed array wrapper */
+    H5FA_hdr_t *hdr = NULL;     /* The fixed array header information */
+
+    /*
+     * Check arguments.
+     */
+    HDassert(f);
+    HDassert(H5F_addr_defined(fa_addr));
+    HDassert(cls);
+
+    /* Load the array header into memory */
+#ifdef H5FA_DEBUG
+HDfprintf(stderr, "%s: fa_addr = %a\n", FUNC, fa_addr);
+#endif /* H5FA_DEBUG */
+    if(NULL == (hdr = (H5FA_hdr_t *)H5AC_protect(f, dxpl_id, H5AC_FARRAY_HDR, fa_addr, cls, ctx_udata, H5AC_READ)))
+        H5E_THROW(H5E_CANTPROTECT, "unable to load fixed array header, address = %llu", (unsigned long long)fa_addr)
+
+    /* Check for pending array deletion */
+    if(hdr->pending_delete)
+        H5E_THROW(H5E_CANTOPENOBJ, "can't open fixed array pending deletion")
+
+    /* Create fixed array info */
+    if(NULL == (fa = H5FL_MALLOC(H5FA_t)))
+        H5E_THROW(H5E_CANTALLOC, "memory allocation failed for fixed array info")
+
+    /* Point fixed array wrapper at header */
+    fa->hdr = hdr;
+    if(H5FA__hdr_incr(fa->hdr) < 0)
+        H5E_THROW(H5E_CANTINC, "can't increment reference count on shared array header")
+
+    /* Increment # of files using this array header */
+    if(H5FA__hdr_fuse_incr(fa->hdr) < 0)
+        H5E_THROW(H5E_CANTINC, "can't increment file reference count on shared array header")
+
+    /* Set file pointer for this array open context */
+    fa->f = f;
+
+    /* Set the return value */
+    ret_value = fa;
+
+CATCH
+
+    if(hdr && H5AC_unprotect(f, dxpl_id, H5AC_FARRAY_HDR, fa_addr, hdr, H5AC__NO_FLAGS_SET) < 0)
+        H5E_THROW(H5E_CANTUNPROTECT, "unable to release fixed array header")
+    if(!ret_value)
+        if(fa && H5FA_close(fa, dxpl_id) < 0)
+            H5E_THROW(H5E_CLOSEERROR, "unable to close fixed array")
+
+END_FUNC(PRIV)  /* end H5FA_open() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA_get_nelmts
+ *
+ * Purpose:	Query the current number of elements in array
+ *
+ * Return:	SUCCEED/FAIL
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PRIV, NOERR,
+herr_t, SUCCEED, -,
+H5FA_get_nelmts(const H5FA_t *fa, hsize_t *nelmts))
+
+    /* Local variables */
+
+#ifdef H5FA_DEBUG
+HDfprintf(stderr, "%s: Called\n", FUNC);
+#endif /* H5FA_DEBUG */
+
+    /*
+     * Check arguments.
+     */
+    HDassert(fa);
+    HDassert(nelmts);
+
+    /* Retrieve the current number of elements in the fixed array */
+    *nelmts = fa->hdr->stats.nelmts;
+
+END_FUNC(PRIV)  /* end H5FA_get_nelmts() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA_get_addr
+ *
+ * Purpose:	Query the address of the array
+ *
+ * Return:	SUCCEED/FAIL
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PRIV, NOERR,
+herr_t, SUCCEED, -,
+H5FA_get_addr(const H5FA_t *fa, haddr_t *addr))
+
+    /* Local variables */
+
+#ifdef H5FA_DEBUG
+HDfprintf(stderr, "%s: Called\n", FUNC);
+#endif /* H5FA_DEBUG */
+
+    /*
+     * Check arguments.
+     */
+    HDassert(fa);
+    HDassert(fa->hdr);
+    HDassert(addr);
+
+    /* Retrieve the address of the fixed array's header */
+    *addr = fa->hdr->addr;
+
+END_FUNC(PRIV)  /* end H5FA_get_addr() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA_set
+ *
+ * Purpose:	Set an element of a fixed array
+ *
+ * Return:	SUCCEED/FAIL
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PRIV, ERR,
+herr_t, SUCCEED, FAIL,
+H5FA_set(const H5FA_t *fa, hid_t dxpl_id, hsize_t idx, const void *elmt))
+
+    /* Local variables */
+    H5FA_hdr_t *hdr = fa->hdr;          /* Header for fixed array */
+    H5FA_dblock_t *dblock = NULL;       /* Pointer to fixed array Data block */
+    H5FA_dblk_page_t *dblk_page = NULL; /* Pointer to fixed array Data block page */
+    unsigned dblock_cache_flags = H5AC__NO_FLAGS_SET;    /* Flags to unprotecting fixed array Data block */
+    unsigned dblk_page_cache_flags = H5AC__NO_FLAGS_SET; /* Flags to unprotecting FIxed Array Data block page */
+    hbool_t hdr_dirty = FALSE;          /* Whether header information changed */
+
+#ifdef H5FA_DEBUG
+HDfprintf(stderr, "%s: Called\n", FUNC);
+HDfprintf(stderr, "%s: Index %Hu\n", FUNC, idx);
+#endif /* H5FA_DEBUG */
+
+    /*
+     * Check arguments.
+     */
+    HDassert(fa);
+    HDassert(fa->hdr);
+
+    /* Set the shared array header's file context for this operation */
+    hdr->f = fa->f;
+
+    /* Check if we need to create the fixed array data block */
+    if(!H5F_addr_defined(hdr->dblk_addr)) {
+#ifdef H5FA_DEBUG
+HDfprintf(stderr, "%s: fixed array data block address not defined!\n", FUNC, idx);
+#endif /* H5FA_DEBUG */
+        /* Create the data block */
+        hdr->dblk_addr = H5FA__dblock_create(hdr, dxpl_id, &hdr_dirty, hdr->cparam.nelmts);
+        if(!H5F_addr_defined(hdr->dblk_addr))
+            H5E_THROW(H5E_CANTCREATE, "unable to create fixed array data block")
+    } /* end if */
+
+    HDassert(idx < hdr->cparam.nelmts);
+
+    /* Protect data block */
+    if(NULL == (dblock = H5FA__dblock_protect(hdr, dxpl_id, hdr->dblk_addr, hdr->stats.nelmts, H5AC_WRITE)))
+	H5E_THROW(H5E_CANTPROTECT, "unable to protect fixed array data block, address = %llu", (unsigned long long)hdr->dblk_addr)
+
+    /* Check for paging data block */
+    if(!dblock->npages) {
+	/* Set element in data block */
+	HDmemcpy(((uint8_t *)dblock->elmts) + (hdr->cparam.cls->nat_elmt_size * idx), elmt, hdr->cparam.cls->nat_elmt_size);
+	dblock_cache_flags |= H5AC__DIRTIED_FLAG;
+    } /* end if */
+    else { /* paging */
+        size_t  page_idx;      		/* Index of page within data block */
+        size_t  dblk_page_nelmts;      	/* # of elements in a data block page */
+        hsize_t elmt_idx;		/* Element index within the page */
+        haddr_t dblk_page_addr;		/* Address of data block page */
+
+        /* Compute the page & element index */
+        page_idx = (size_t)idx / dblock->dblk_page_nelmts;
+        elmt_idx = (size_t)idx % dblock->dblk_page_nelmts;
+
+        /* Get the address of the data block page */
+	dblk_page_addr = dblock->addr + H5FA_DBLOCK_PREFIX_SIZE(dblock) +
+                        (page_idx * dblock->dblk_page_size);
+
+        /* Check for using last page, to set the number of elements on the page */
+	if((page_idx + 1) == dblock->npages)
+	    dblk_page_nelmts = dblock->last_page_nelmts;
+	else
+	    dblk_page_nelmts = dblock->dblk_page_nelmts;
+
+        /* Check if the page has been create yet */
+        if(!H5V_bit_get(dblock->dblk_page_init, page_idx)) {
+	    /* Create the data block page */
+	    if(H5FA__dblk_page_create(hdr, dxpl_id, dblk_page_addr, dblk_page_nelmts) < 0)
+		H5E_THROW(H5E_CANTCREATE, "unable to create data block page")
+
+	    /* Mark data block page as initialized in data block */
+	    H5V_bit_set(dblock->dblk_page_init, page_idx, TRUE);
+	    dblock_cache_flags |= H5AC__DIRTIED_FLAG;
+	} /* end if */
+
+        /* Protect the data block page */
+	if(NULL == (dblk_page = H5FA__dblk_page_protect(hdr, dxpl_id, dblk_page_addr, dblk_page_nelmts, H5AC_WRITE)))
+	    H5E_THROW(H5E_CANTPROTECT, "unable to protect fixed array data block page, address = %llu", (unsigned long long)dblk_page_addr)
+
+        /* Set the element in the data block page */
+	HDmemcpy(((uint8_t *)dblk_page->elmts) + (hdr->cparam.cls->nat_elmt_size * elmt_idx), elmt, hdr->cparam.cls->nat_elmt_size);
+	dblk_page_cache_flags |= H5AC__DIRTIED_FLAG;
+    } /* end else */
+
+CATCH
+    /* Check for header modified */
+    if(hdr_dirty)
+        if(H5FA__hdr_modified(hdr) < 0)
+            H5E_THROW(H5E_CANTMARKDIRTY, "unable to mark fixed array header as modified")
+
+    /* Release resources */
+    if(dblock && H5FA__dblock_unprotect(dblock, dxpl_id, dblock_cache_flags) < 0)
+        H5E_THROW(H5E_CANTUNPROTECT, "unable to release fixed array data block")
+    if(dblk_page && H5FA__dblk_page_unprotect(dblk_page, dxpl_id, dblk_page_cache_flags) < 0)
+        H5E_THROW(H5E_CANTUNPROTECT, "unable to release fixed array data block page")
+
+END_FUNC(PRIV)  /* end H5FA_set() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA_get
+ *
+ * Purpose:	Get an element of a fixed array
+ *
+ * Return:	SUCCEED/FAIL
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PRIV, ERR,
+herr_t, SUCCEED, FAIL,
+H5FA_get(const H5FA_t *fa, hid_t dxpl_id, hsize_t idx, void *elmt))
+
+    /* Local variables */
+    H5FA_hdr_t *hdr = fa->hdr;          /* Header for FA */
+    H5FA_dblock_t *dblock = NULL;       /* Pointer to data block for FA */
+    H5FA_dblk_page_t *dblk_page = NULL; /* Pointer to data block page for FA */
+
+#ifdef H5FA_DEBUG
+HDfprintf(stderr, "%s: Called\n", FUNC);
+HDfprintf(stderr, "%s: Index %Hu\n", FUNC, idx);
+#endif /* H5FA_DEBUG */
+
+    /*
+     * Check arguments.
+     */
+    HDassert(fa);
+    HDassert(fa->hdr);
+
+    /* Set the shared array header's file context for this operation */
+    hdr->f = fa->f;
+
+    /* Check if the fixed array data block has been allocated on disk yet */
+    if(!H5F_addr_defined(hdr->dblk_addr)) {
+        /* Call the class's 'fill' callback */
+        if((hdr->cparam.cls->fill)(elmt, (size_t)1) < 0)
+            H5E_THROW(H5E_CANTSET, "can't set element to class's fill value")
+    } /* end if */
+    else {
+        /* Get the data block */
+        HDassert(H5F_addr_defined(hdr->dblk_addr));
+        if(NULL == (dblock = H5FA__dblock_protect(hdr, dxpl_id, hdr->dblk_addr, hdr->stats.nelmts, H5AC_READ)))
+            H5E_THROW(H5E_CANTPROTECT, "unable to protect fixed array data block, address = %llu", (unsigned long long)hdr->dblk_addr)
+
+        /* Check for paged data block */
+        if(!dblock->npages)
+            /* Retrieve element from data block */
+            HDmemcpy(elmt, ((uint8_t *)dblock->elmts) + (hdr->cparam.cls->nat_elmt_size * idx), hdr->cparam.cls->nat_elmt_size);
+        else { /* paging */
+            size_t  page_idx;           /* Index of page within data block */
+
+            /* Compute the page index */
+            page_idx = (size_t)idx / dblock->dblk_page_nelmts;
+
+            /* Check if the page is defined yet */
+            if(!H5V_bit_get(dblock->dblk_page_init, page_idx)) {
+                /* Call the class's 'fill' callback */
+                if((hdr->cparam.cls->fill)(elmt, (size_t)1) < 0)
+                    H5E_THROW(H5E_CANTSET, "can't set element to class's fill value")
+
+                /* We've retrieved the value, leave now */
+                H5_LEAVE(SUCCEED)
+            } /* end if */
+            else { /* get the page */
+                hsize_t elmt_idx;		/* Element index within the page */
+                haddr_t dblk_page_addr;     /* Address of data block page */
+                size_t  dblk_page_nelmts;   /* # of elements in a data block page */
+
+                /* Compute the element index */
+                elmt_idx = (size_t)idx % dblock->dblk_page_nelmts;
+
+                /* Compute the address of the data block */
+                dblk_page_addr = dblock->addr + H5FA_DBLOCK_PREFIX_SIZE(dblock) + (page_idx * dblock->dblk_page_size);
+
+                /* Check for using last page, to set the number of elements on the page */
+                if((page_idx + 1) == dblock->npages)
+                    dblk_page_nelmts = dblock->last_page_nelmts;
+                else
+                    dblk_page_nelmts = dblock->dblk_page_nelmts;
+
+                /* Protect the data block page */
+                if(NULL == (dblk_page = H5FA__dblk_page_protect(hdr, dxpl_id, dblk_page_addr, dblk_page_nelmts, H5AC_READ)))
+                    H5E_THROW(H5E_CANTPROTECT, "unable to protect fixed array data block page, address = %llu", (unsigned long long)dblk_page_addr)
+
+                /* Retrieve element from data block */
+                HDmemcpy(elmt, ((uint8_t *)dblk_page->elmts) + (hdr->cparam.cls->nat_elmt_size * elmt_idx), hdr->cparam.cls->nat_elmt_size);
+            } /* end else */
+        } /* end else */
+    } /* end else */
+
+CATCH
+    if(dblock && H5FA__dblock_unprotect(dblock, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+        H5E_THROW(H5E_CANTUNPROTECT, "unable to release fixed array data block")
+    if(dblk_page && H5FA__dblk_page_unprotect(dblk_page, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+        H5E_THROW(H5E_CANTUNPROTECT, "unable to release fixed array data block page")
+
+END_FUNC(PRIV)  /* end H5FA_get() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA_close
+ *
+ * Purpose:	Close a fixed array
+ *
+ * Return:	SUCCEED/FAIL
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PRIV, ERR,
+herr_t, SUCCEED, FAIL,
+H5FA_close(H5FA_t *fa, hid_t dxpl_id))
+
+    /* Local variables */
+    hbool_t pending_delete = FALSE;     /* Whether the array is pending deletion */
+    haddr_t fa_addr = HADDR_UNDEF;      /* Address of array (for deletion) */
+
+#ifdef H5FA_DEBUG
+HDfprintf(stderr, "%s: Called\n", FUNC);
+#endif /* H5FA_DEBUG */
+
+    /*
+     * Check arguments.
+     */
+    HDassert(fa);
+
+    /* Decrement file reference & check if this is the last open fixed array using the shared array header */
+    if(0 == H5FA__hdr_fuse_decr(fa->hdr)) {
+        /* Set the shared array header's file context for this operation */
+        fa->hdr->f = fa->f;
+
+        /* Shut down anything that can't be put in the header's 'flush' callback */
+
+        /* Check for pending array deletion */
+        if(fa->hdr->pending_delete) {
+            /* Set local info, so array deletion can occur after decrementing the
+             *  header's ref count
+             */
+            pending_delete = TRUE;
+            fa_addr = fa->hdr->addr;
+        } /* end if */
+    } /* end if */
+
+    /* Decrement the reference count on the array header */
+    /* (don't put in H5FA_hdr_fuse_decr() as the array header may be evicted
+     *  immediately -QAK)
+     */
+    if(H5FA__hdr_decr(fa->hdr) < 0)
+        H5E_THROW(H5E_CANTDEC, "can't decrement reference count on shared array header")
+
+    /* Check for pending array deletion */
+    if(pending_delete) {
+        H5FA_hdr_t *hdr;            /* Another pointer to fixed array header */
+
+        /* Lock the array header into memory */
+        if(NULL == (hdr = (H5FA_hdr_t *)H5AC_protect(fa->f, dxpl_id, H5AC_FARRAY_HDR, fa_addr, NULL, NULL, H5AC_WRITE)))
+            H5E_THROW(H5E_CANTLOAD, "unable to load fixed array header")
+
+        /* Set the shared array header's file context for this operation */
+        hdr->f = fa->f;
+
+        /* Delete array, starting with header (unprotects header) */
+        if(H5FA__hdr_delete(hdr, dxpl_id) < 0)
+            H5E_THROW(H5E_CANTDELETE, "unable to delete fixed array")
+    } /* end if */
+
+    /* Release the fixed array wrapper */
+    fa = H5FL_FREE(H5FA_t, fa);
+
+CATCH
+
+END_FUNC(PRIV)  /* end H5FA_close() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA_delete
+ *
+ * Purpose:	Delete a fixed array
+ *
+ * Return:	SUCCEED/FAIL
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PRIV, ERR,
+herr_t, SUCCEED, FAIL,
+H5FA_delete(H5F_t *f, hid_t dxpl_id, haddr_t fa_addr))
+
+    /* Local variables */
+    H5FA_hdr_t *hdr = NULL;             /* The fixed array header information */
+
+    /*
+     * Check arguments.
+     */
+    HDassert(f);
+    HDassert(H5F_addr_defined(fa_addr));
+
+    /* Lock the array header into memory */
+#ifdef H5FA_DEBUG
+HDfprintf(stderr, "%s: fa_addr = %a\n", FUNC, fa_addr);
+#endif /* H5FA_DEBUG */
+    if(NULL == (hdr = (H5FA_hdr_t *)H5AC_protect(f, dxpl_id, H5AC_FARRAY_HDR, fa_addr, NULL, NULL, H5AC_WRITE)))
+        H5E_THROW(H5E_CANTPROTECT, "unable to protect fixed array header, address = %llu", (unsigned long long)fa_addr)
+
+    /* Check for files using shared array header */
+    if(hdr->file_rc)
+        hdr->pending_delete = TRUE;
+    else {
+        /* Set the shared array header's file context for this operation */
+        hdr->f = f;
+
+        /* Delete array now, starting with header (unprotects header) */
+        if(H5FA__hdr_delete(hdr, dxpl_id) < 0)
+            H5E_THROW(H5E_CANTDELETE, "unable to delete fixed array")
+        hdr = NULL;
+    } /* end if */
+
+CATCH
+
+    /* Unprotect the header, if an error occurred */
+    if(hdr && H5AC_unprotect(f, dxpl_id, H5AC_FARRAY_HDR, fa_addr, hdr, H5AC__NO_FLAGS_SET) < 0)
+        H5E_THROW(H5E_CANTUNPROTECT, "unable to release fixed array header")
+
+END_FUNC(PRIV)  /* end H5FA_delete() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA_iterate
+ *
+ * Purpose:	Iterate over the elements of a fixed array
+ *
+ * Note:	This is not very efficient, we should be iterating directly
+ *		over the fixed array's direct block [pages].
+ *
+ * Return:	SUCCEED/FAIL
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PRIV, ERR,
+herr_t, SUCCEED, FAIL,
+H5FA_iterate(H5FA_t *fa, hid_t dxpl_id, H5FA_operator_t op, void *udata))
+
+    /* Local variables */
+    uint8_t             *elmt = NULL; 
+    hsize_t		u;
+
+    /*
+     * Check arguments.
+     */
+    HDassert(fa);
+    HDassert(op);
+    HDassert(udata);
+
+    /* Allocate space for a native array element */
+    if(NULL == (elmt = H5FL_BLK_MALLOC(native_elmt, fa->hdr->cparam.cls->nat_elmt_size)))
+	H5E_THROW(H5E_CANTALLOC, "memory allocation failed for fixed array element")
+
+    /* Iterate over all elements in array */
+    for(u = 0; u < fa->hdr->stats.nelmts; u++) {
+        int cb_ret;     /* Return value from callback */
+
+        /* Get array element */
+        if(H5FA_get(fa, dxpl_id, u, elmt) < 0)
+            H5E_THROW(H5E_CANTGET, "unable to delete fixed array")
+
+        /* Make callback */
+        if((cb_ret = (*op)(u, elmt, udata)) < 0) {
+            H5E_PRINTF(H5E_BADITER, "iterator function failed");
+            H5_LEAVE(cb_ret)
+        } /* end if */
+    } /* end for */
+
+CATCH
+
+    if(elmt)
+	(void)H5FL_BLK_FREE(native_elmt, elmt);
+
+END_FUNC(PRIV)  /* end H5FA_iterate() */
+
diff --git a/src/H5FAcache.c b/src/H5FAcache.c
new file mode 100644
index 0000000..7a7e867
--- /dev/null
+++ b/src/H5FAcache.c
@@ -0,0 +1,1107 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*-------------------------------------------------------------------------
+ *
+ * Created:		H5FAcache.c
+ *
+ * Purpose:		Implement fixed array metadata cache methods.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+/**********************/
+/* Module Declaration */
+/**********************/
+
+#define H5FA_MODULE
+
+
+/***********************/
+/* Other Packages Used */
+/***********************/
+
+
+/***********/
+/* Headers */
+/***********/
+#include "H5private.h"		/* Generic Functions			*/
+#include "H5Eprivate.h"		/* Error handling		  	*/
+#include "H5FApkg.h"		/* Fixed Arrays				*/
+#include "H5MFprivate.h"	/* File memory management		*/
+#include "H5Vprivate.h"		/* Vectors and arrays 			*/
+#include "H5WBprivate.h"        /* Wrapped Buffers                      */
+
+
+/****************/
+/* Local Macros */
+/****************/
+
+/* Fixed Array format version #'s */
+#define H5FA_HDR_VERSION        0               /* Header */
+#define H5FA_DBLOCK_VERSION     0               /* Data block */
+
+/* Size of stack buffer for serialization buffers */
+#define H5FA_HDR_BUF_SIZE       512
+#define H5FA_DBLOCK_BUF_SIZE    512
+#define H5FA_DBLK_PAGE_BUF_SIZE 512
+
+
+/******************/
+/* Local Typedefs */
+/******************/
+
+
+/********************/
+/* Package Typedefs */
+/********************/
+
+
+/********************/
+/* Local Prototypes */
+/********************/
+
+/* Metadata cache (H5AC) callbacks */
+static H5FA_hdr_t *H5FA__cache_hdr_load(H5F_t *f, hid_t dxpl_id, haddr_t addr, const void *udata, void *udata2);
+static herr_t H5FA__cache_hdr_flush(H5F_t *f, hid_t dxpl_id, hbool_t destroy, haddr_t addr, H5FA_hdr_t *hdr, unsigned * flags_ptr);
+static herr_t H5FA__cache_hdr_clear(H5F_t *f, H5FA_hdr_t *hdr, hbool_t destroy);
+static herr_t H5FA__cache_hdr_size(const H5F_t *f, const H5FA_hdr_t *hdr, size_t *size_ptr);
+static herr_t H5FA__cache_hdr_dest(H5F_t *f, H5FA_hdr_t *hdr);
+
+static H5FA_dblock_t *H5FA__cache_dblock_load(H5F_t *f, hid_t dxpl_id, haddr_t addr, const void *udata, void *udata2);
+static herr_t H5FA__cache_dblock_flush(H5F_t *f, hid_t dxpl_id, hbool_t destroy, haddr_t addr, H5FA_dblock_t *dblock, unsigned * flags_ptr);
+static herr_t H5FA__cache_dblock_clear(H5F_t *f, H5FA_dblock_t *dblock, hbool_t destroy);
+static herr_t H5FA__cache_dblock_size(const H5F_t *f, const H5FA_dblock_t *dblock, size_t *size_ptr);
+static herr_t H5FA__cache_dblock_dest(H5F_t *f, H5FA_dblock_t *dblock);
+
+static H5FA_dblk_page_t *H5FA__cache_dblk_page_load(H5F_t *f, hid_t dxpl_id, haddr_t addr, const void *udata, void *udata2);
+static herr_t H5FA__cache_dblk_page_flush(H5F_t *f, hid_t dxpl_id, hbool_t destroy, haddr_t addr, H5FA_dblk_page_t *dblk_page, unsigned * flags_ptr);
+static herr_t H5FA__cache_dblk_page_clear(H5F_t *f, H5FA_dblk_page_t *dblk_page, hbool_t destroy);
+static herr_t H5FA__cache_dblk_page_size(const H5F_t *f, const H5FA_dblk_page_t *dblk_page, size_t *size_ptr);
+static herr_t H5FA__cache_dblk_page_dest(H5F_t *f, H5FA_dblk_page_t *dblk_page);
+
+
+/*********************/
+/* Package Variables */
+/*********************/
+
+/* H5FA header inherits cache-like properties from H5AC */
+const H5AC_class_t H5AC_FARRAY_HDR[1] = {{
+    H5AC_FARRAY_HDR_ID,
+    (H5AC_load_func_t)H5FA__cache_hdr_load,
+    (H5AC_flush_func_t)H5FA__cache_hdr_flush,
+    (H5AC_dest_func_t)H5FA__cache_hdr_dest,
+    (H5AC_clear_func_t)H5FA__cache_hdr_clear,
+    (H5AC_notify_func_t)NULL,
+    (H5AC_size_func_t)H5FA__cache_hdr_size,
+}};
+
+
+/* H5FA data block inherits cache-like properties from H5AC */
+const H5AC_class_t H5AC_FARRAY_DBLOCK[1] = {{
+    H5AC_FARRAY_DBLOCK_ID,
+    (H5AC_load_func_t)H5FA__cache_dblock_load,
+    (H5AC_flush_func_t)H5FA__cache_dblock_flush,
+    (H5AC_dest_func_t)H5FA__cache_dblock_dest,
+    (H5AC_clear_func_t)H5FA__cache_dblock_clear,
+    (H5AC_notify_func_t)NULL,
+    (H5AC_size_func_t)H5FA__cache_dblock_size,
+}};
+
+/* H5FA data block page inherits cache-like properties from H5AC */
+const H5AC_class_t H5AC_FARRAY_DBLK_PAGE[1] = {{
+    H5AC_FARRAY_DBLK_PAGE_ID,
+    (H5AC_load_func_t)H5FA__cache_dblk_page_load,
+    (H5AC_flush_func_t)H5FA__cache_dblk_page_flush,
+    (H5AC_dest_func_t)H5FA__cache_dblk_page_dest,
+    (H5AC_clear_func_t)H5FA__cache_dblk_page_clear,
+    (H5AC_notify_func_t)NULL,
+    (H5AC_size_func_t)H5FA__cache_dblk_page_size,
+}};
+
+
+/*****************************/
+/* Library Private Variables */
+/*****************************/
+
+
+/*******************/
+/* Local Variables */
+/*******************/
+
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__cache_hdr_load
+ *
+ * Purpose:	Loads a fixed array header from the disk.
+ *
+ * Return:	Success:	Pointer to a new fixed array
+ *		Failure:	NULL
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(STATIC, ERR,
+H5FA_hdr_t *, NULL, NULL,
+H5FA__cache_hdr_load(H5F_t *f, hid_t dxpl_id, haddr_t addr, const void *_cls,
+    void *ctx_udata))
+
+    /* Local variables */
+    const H5FA_class_t  *cls = (const H5FA_class_t *)_cls;      /* Fixed array class */
+    H5FA_hdr_t		*hdr = NULL;    /* Fixed array info */
+    size_t		size;           /* Header size */
+    H5WB_t              *wb = NULL;     /* Wrapped buffer for header data */
+    uint8_t             hdr_buf[H5FA_HDR_BUF_SIZE]; /* Buffer for header */
+    uint8_t		*buf;           /* Pointer to header buffer */
+    const uint8_t	*p;             /* Pointer into raw data buffer */
+    uint32_t            stored_chksum;  /* Stored metadata checksum value */
+    uint32_t            computed_chksum; /* Computed metadata checksum value */
+
+    /* Check arguments */
+    HDassert(f);
+    HDassert(H5F_addr_defined(addr));
+
+    /* Allocate space for the fixed array data structure */
+    if(NULL == (hdr = H5FA__hdr_alloc(f, cls, ctx_udata)))
+	H5E_THROW(H5E_CANTALLOC, "memory allocation failed for fixed array shared header")
+
+    /* Set the fixed array header's address */
+    hdr->addr = addr;
+
+    /* Wrap the local buffer for serialized info */
+    if(NULL == (wb = H5WB_wrap(hdr_buf, sizeof(hdr_buf))))
+	H5E_THROW(H5E_CANTINIT, "can't wrap buffer")
+
+    /* Compute the 'base' size of the fixed array header on disk */
+    size = H5FA_HEADER_SIZE(hdr);
+
+    /* Get a pointer to a buffer that's large enough for serialized header */
+    if(NULL == (buf = (uint8_t *)H5WB_actual(wb, size)))
+	H5E_THROW(H5E_CANTGET, "can't get actual buffer")
+
+    /* Read header from disk */
+    if(H5F_block_read(f, H5FD_MEM_FARRAY_HDR, addr, size, dxpl_id, buf) < 0)
+	H5E_THROW(H5E_READERROR, "can't read fixed array header")
+
+    /* Get temporary pointer to serialized header */
+    p = buf;
+
+    /* Magic number */
+    if(HDmemcmp(p, H5FA_HDR_MAGIC, (size_t)H5_SIZEOF_MAGIC))
+	H5E_THROW(H5E_BADVALUE, "wrong fixed array header signature")
+    p += H5_SIZEOF_MAGIC;
+
+    /* Version */
+    if(*p++ != H5FA_HDR_VERSION)
+	H5E_THROW(H5E_VERSION, "wrong fixed array header version")
+
+    /* Fixed array type */
+    if(*p++ != (uint8_t)cls->id)
+	H5E_THROW(H5E_BADTYPE, "incorrect fixed array class")
+
+    /* General array creation/configuration information */
+    hdr->cparam.raw_elmt_size = *p++;         	   /* Element size in file (in bytes) */
+    hdr->cparam.max_dblk_page_nelmts_bits = *p++;  /* Log2(Max. # of elements in data block page) - 
+						      i.e. # of bits needed to store max. # of 
+						      elements in data block page. */
+
+    /* Array statistics */
+    H5F_DECODE_LENGTH(f, p, hdr->cparam.nelmts);	/* Number of elements */
+
+    /* Internal information */
+    H5F_addr_decode(f, &p, &hdr->dblk_addr); 		/* Address of index block */
+
+    /* Initializations of header info */
+    hdr->stats.nelmts = hdr->cparam.nelmts;
+    hdr->stats.hdr_size = hdr->size = size;  	/* Size of header in file */
+
+    /* Sanity check */
+    /* (allow for checksum not decoded yet) */
+    HDassert((size_t)(p - buf) == (size - H5FA_SIZEOF_CHKSUM));
+
+    /* Compute checksum on entire header */
+    /* (including the filter information, if present) */
+    computed_chksum = H5_checksum_metadata(buf, (size_t)(p - buf), 0);
+
+    /* Metadata checksum */
+    UINT32DECODE(p, stored_chksum);
+
+    /* Sanity check */
+    HDassert((size_t)(p - buf) == size);
+
+    /* Verify checksum */
+    if(stored_chksum != computed_chksum)
+	H5E_THROW(H5E_BADVALUE, "incorrect metadata checksum for fixed array header")
+
+    /* Set return value */
+    ret_value = hdr;
+
+CATCH
+
+    /* Release resources */
+    if(wb && H5WB_unwrap(wb) < 0)
+	H5E_THROW(H5E_CLOSEERROR, "can't close wrapped buffer")
+    if(!ret_value)
+        if(hdr && H5FA__cache_hdr_dest(f, hdr) < 0)
+            H5E_THROW(H5E_CANTFREE, "unable to destroy fixed array header")
+
+END_FUNC(STATIC)   /* end H5FA__cache_hdr_load() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__cache_hdr_flush
+ *
+ * Purpose:	Flushes a dirty fixed array header to disk.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(STATIC, ERR,
+herr_t, SUCCEED, FAIL,
+H5FA__cache_hdr_flush(H5F_t *f, hid_t dxpl_id, hbool_t destroy, haddr_t addr,
+    H5FA_hdr_t *hdr, unsigned UNUSED * flags_ptr))
+
+    H5WB_t *wb = NULL;                  /* Wrapped buffer for header data */
+    uint8_t hdr_buf[H5FA_HDR_BUF_SIZE]; /* Buffer for header */
+
+    /* check arguments */
+    HDassert(f);
+    HDassert(H5F_addr_defined(addr));
+    HDassert(hdr);
+
+    if(hdr->cache_info.is_dirty) {
+        uint8_t	*buf;           /* Temporary raw data buffer */
+        uint8_t *p;             /* Pointer into raw data buffer */
+        size_t	size;           /* Header size on disk */
+        uint32_t metadata_chksum; /* Computed metadata checksum value */
+
+        /* Wrap the local buffer for serialized header info */
+        if(NULL == (wb = H5WB_wrap(hdr_buf, sizeof(hdr_buf))))
+            H5E_THROW(H5E_CANTINIT, "can't wrap buffer")
+
+        /* Compute the size of the array header on disk */
+        size = hdr->size;
+
+        /* Get a pointer to a buffer that's large enough for serialized header */
+        if(NULL == (buf = (uint8_t *)H5WB_actual(wb, size)))
+            H5E_THROW(H5E_CANTGET, "can't get actual buffer")
+
+        /* Get temporary pointer to serialized header */
+        p = buf;
+
+        /* Magic number */
+        HDmemcpy(p, H5FA_HDR_MAGIC, (size_t)H5_SIZEOF_MAGIC);
+        p += H5_SIZEOF_MAGIC;
+
+        /* Version # */
+        *p++ = H5FA_HDR_VERSION;
+
+        /* Fixed array type */
+        *p++ = hdr->cparam.cls->id;
+
+        /* General array creation/configuration information */
+        *p++ = hdr->cparam.raw_elmt_size;          /* Element size in file (in bytes) */
+        *p++ = hdr->cparam.max_dblk_page_nelmts_bits;  /* Log2(Max. # of elements in data block page) - i.e. # of bits needed to store max. # of elements in data block page */
+
+        /* Array statistics */
+        H5F_ENCODE_LENGTH(f, p, hdr->stats.nelmts);       /* Number of elements for the fixed array */
+
+        /* Internal information */
+        H5F_addr_encode(f, &p, hdr->dblk_addr);  /* Address of fixed array data block */
+
+        /* Compute metadata checksum */
+        metadata_chksum = H5_checksum_metadata(buf, (size_t)(p - buf), 0);
+
+        /* Metadata checksum */
+        UINT32ENCODE(p, metadata_chksum);
+
+	/* Write the array header. */
+        HDassert((size_t)(p - buf) == size);
+	if(H5F_block_write(f, H5FD_MEM_FARRAY_HDR, addr, size, dxpl_id, buf) < 0)
+            H5E_THROW(H5E_WRITEERROR, "unable to save fixed array header to disk")
+
+	hdr->cache_info.is_dirty = FALSE;
+    } /* end if */
+
+    if(destroy)
+        if(H5FA__cache_hdr_dest(f, hdr) < 0)
+            H5E_THROW(H5E_CANTFREE, "unable to destroy fixed array header")
+
+CATCH
+
+    /* Release resources */
+    if(wb && H5WB_unwrap(wb) < 0)
+	H5E_THROW(H5E_CLOSEERROR, "can't close wrapped buffer")
+
+END_FUNC(STATIC)   /* end H5FA__cache_hdr_flush() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__cache_hdr_clear
+ *
+ * Purpose:	Mark a fixed array header in memory as non-dirty.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(STATIC, ERR,
+herr_t, SUCCEED, FAIL,
+H5FA__cache_hdr_clear(H5F_t *f, H5FA_hdr_t *hdr, hbool_t destroy))
+
+    /* Sanity check */
+    HDassert(hdr);
+
+    /* Reset the dirty flag.  */
+    hdr->cache_info.is_dirty = FALSE;
+
+    if(destroy)
+        if(H5FA__cache_hdr_dest(f, hdr) < 0)
+            H5E_THROW(H5E_CANTFREE, "unable to destroy fixed array header")
+
+CATCH
+
+END_FUNC(STATIC)   /* end H5FA__cache_hdr_clear() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__cache_hdr_size
+ *
+ * Purpose:	Compute the size in bytes of a fixed array header
+ *		on disk, and return it in *size_ptr.  On failure,
+ *		the value of *size_ptr is undefined.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+/* ARGSUSED */
+BEGIN_FUNC(STATIC, NOERR,
+herr_t, SUCCEED, -,
+H5FA__cache_hdr_size(const H5F_t UNUSED *f, const H5FA_hdr_t *hdr,
+    size_t *size_ptr))
+
+    /* Sanity check */
+    HDassert(f);
+    HDassert(hdr);
+    HDassert(size_ptr);
+
+    /* Set size value */
+    *size_ptr = hdr->size;
+
+END_FUNC(STATIC)   /* end H5FA__cache_hdr_size() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__cache_hdr_dest
+ *
+ * Purpose:	Destroys a fixed array header in memory.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+/* ARGSUSED */
+BEGIN_FUNC(STATIC, ERR,
+herr_t, SUCCEED, FAIL,
+H5FA__cache_hdr_dest(H5F_t *f, H5FA_hdr_t *hdr))
+
+    /* Check arguments */
+    HDassert(f);
+    HDassert(hdr);
+
+    /* Verify that header is clean */
+    HDassert(hdr->cache_info.is_dirty == FALSE);
+
+    /* If we're going to free the space on disk, the address must be valid */
+    HDassert(!hdr->cache_info.free_file_space_on_destroy || H5F_addr_defined(hdr->cache_info.addr));
+
+    /* Check for freeing file space for fixed array header */
+    if(hdr->cache_info.free_file_space_on_destroy) {
+        /* Sanity check address */
+        HDassert(H5F_addr_eq(hdr->addr, hdr->cache_info.addr));
+
+        /* Release the space on disk */
+        /* (XXX: Nasty usage of internal DXPL value! -QAK) */
+        if(H5MF_xfree(f, H5FD_MEM_FARRAY_HDR, H5AC_dxpl_id, hdr->cache_info.addr, (hsize_t)hdr->size) < 0)
+            H5E_THROW(H5E_CANTFREE, "unable to free fixed array header")
+    } /* end if */
+
+    /* Release the fixed array header */
+    if(H5FA__hdr_dest(hdr) < 0)
+        H5E_THROW(H5E_CANTFREE, "can't free fixed array header")
+
+CATCH
+
+END_FUNC(STATIC)   /* end H5FA__cache_hdr_dest() */
+
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__cache_dblock_load
+ *
+ * Purpose:	Loads a fixed array data block from the disk.
+ *
+ * Return:	Success:	Pointer to a new fixed array data block
+ *		Failure:	NULL
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(STATIC, ERR,
+H5FA_dblock_t *, NULL, NULL,
+H5FA__cache_dblock_load(H5F_t *f, hid_t dxpl_id, haddr_t addr,
+    const void *_nelmts, void *_hdr))
+
+    /* Local variables */
+    H5FA_hdr_t     *hdr = (H5FA_hdr_t *)_hdr;  /* Shared fixed array information */
+    const hsize_t  *nelmts = (const hsize_t *)_nelmts;  /* Number of elements in data block */
+    H5FA_dblock_t  *dblock = NULL;  /* Data block info */
+    size_t	   size;            /* Data block size */
+    H5WB_t         *wb = NULL;      /* Wrapped buffer for data block data */
+    uint8_t        dblock_buf[H5FA_DBLOCK_BUF_SIZE]; /* Buffer for data block */
+    uint8_t	   *buf;             /* Pointer to data block buffer */
+    const uint8_t  *p;              /* Pointer into raw data buffer */
+    uint32_t       stored_chksum;   /* Stored metadata checksum value */
+    uint32_t       computed_chksum; /* Computed metadata checksum value */
+    haddr_t        arr_addr;        /* Address of array header in the file */
+
+    /* Sanity check */
+    HDassert(f);
+    HDassert(H5F_addr_defined(addr));
+    HDassert(nelmts && *nelmts > 0);
+    HDassert(hdr);
+
+    /* Allocate the fixed array data block */
+    if(NULL == (dblock = H5FA__dblock_alloc(hdr, *nelmts)))
+	H5E_THROW(H5E_CANTALLOC, "memory allocation failed for fixed array data block")
+
+    /* Set the fixed array data block's information */
+    dblock->addr = addr;
+
+    /* Wrap the local buffer for serialized info */
+    if(NULL == (wb = H5WB_wrap(dblock_buf, sizeof(dblock_buf))))
+	H5E_THROW(H5E_CANTINIT, "can't wrap buffer")
+
+    /* Compute the size of the fixed array data block on disk */
+    if(!dblock->npages)
+        size = (size_t)H5FA_DBLOCK_SIZE(dblock);
+    else
+        size = H5FA_DBLOCK_PREFIX_SIZE(dblock);
+
+    /* Get a pointer to a buffer that's large enough for serialized info */
+    if(NULL == (buf = (uint8_t *)H5WB_actual(wb, size)))
+	H5E_THROW(H5E_CANTGET, "can't get actual buffer")
+
+    /* Read data block from disk */
+    if(H5F_block_read(f, H5FD_MEM_FARRAY_DBLOCK, addr, size, dxpl_id, buf) < 0)
+	H5E_THROW(H5E_READERROR, "can't read fixed array data block")
+
+    /* Get temporary pointer to serialized header */
+    p = buf;
+
+    /* Magic number */
+    if(HDmemcmp(p, H5FA_DBLOCK_MAGIC, (size_t)H5_SIZEOF_MAGIC))
+	H5E_THROW(H5E_BADVALUE, "wrong fixed array data block signature")
+    p += H5_SIZEOF_MAGIC;
+
+    /* Version */
+    if(*p++ != H5FA_DBLOCK_VERSION)
+	H5E_THROW(H5E_VERSION, "wrong fixed array data block version")
+
+    /* Address of header for array that owns this block (just for file integrity checks) */
+    H5F_addr_decode(f, &p, &arr_addr);
+    if(H5F_addr_ne(arr_addr, hdr->addr))
+	H5E_THROW(H5E_BADVALUE, "wrong fixed array header address")
+
+    /* Fixed array type */
+    if(*p++ != (uint8_t)hdr->cparam.cls->id)
+	H5E_THROW(H5E_BADTYPE, "incorrect fixed array class")
+
+    /* Page initialization flags */
+    if(dblock->npages > 0) {
+	HDmemcpy(dblock->dblk_page_init, p, dblock->dblk_page_init_size);
+        p += dblock->dblk_page_init_size;
+    } /* end if */
+
+    /* Only decode elements if the data block is not paged */
+    if(!dblock->npages) {
+        /* Decode elements in data block */
+        /* Convert from raw elements on disk into native elements in memory */
+        if((hdr->cparam.cls->decode)(p, dblock->elmts, (size_t)*nelmts, hdr->cb_ctx) < 0)
+            H5E_THROW(H5E_CANTDECODE, "can't decode fixed array data elements")
+        p += (*nelmts * hdr->cparam.raw_elmt_size);
+    } /* end if */
+
+    /* Sanity check */
+    /* (allow for checksum not decoded yet) */
+    HDassert((size_t)(p - buf) == (size - H5FA_SIZEOF_CHKSUM));
+
+    /* Set the data block's size */
+    dblock->size = H5FA_DBLOCK_SIZE(dblock);
+
+    /* Compute checksum on data block */
+    computed_chksum = H5_checksum_metadata(buf, (size_t)(p - buf), 0);
+
+    /* Metadata checksum */
+    UINT32DECODE(p, stored_chksum);
+
+    /* Sanity check */
+    HDassert((size_t)(p - buf) == size);
+
+    /* Verify checksum */
+    if(stored_chksum != computed_chksum)
+	H5E_THROW(H5E_BADVALUE, "incorrect metadata checksum for fixed array data block")
+
+    /* Set return value */
+    ret_value = dblock;
+
+CATCH
+
+    /* Release resources */
+    if(wb && H5WB_unwrap(wb) < 0)
+	H5E_THROW(H5E_CLOSEERROR, "can't close wrapped buffer")
+    if(!ret_value)
+        if(dblock && H5FA__cache_dblock_dest(f, dblock) < 0)
+            H5E_THROW(H5E_CANTFREE, "unable to destroy fixed array data block")
+
+END_FUNC(STATIC)   /* end H5FA__cache_dblock_load() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__cache_dblock_flush
+ *
+ * Purpose:	Flushes a dirty fixed array data block to disk.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(STATIC, ERR,
+herr_t, SUCCEED, FAIL,
+H5FA__cache_dblock_flush(H5F_t *f, hid_t dxpl_id, hbool_t destroy, haddr_t addr,
+    H5FA_dblock_t *dblock, unsigned UNUSED * flags_ptr))
+
+    /* Local variables */
+    H5WB_t *wb = NULL;                     /* Wrapped buffer for serializing data */
+    uint8_t ser_buf[H5FA_DBLOCK_BUF_SIZE]; /* Serialization buffer */
+
+    /* Sanity check */
+    HDassert(f);
+    HDassert(H5F_addr_defined(addr));
+    HDassert(dblock);
+    HDassert(dblock->hdr);
+
+    if(dblock->cache_info.is_dirty) {
+        uint8_t	*buf;           /* Temporary raw data buffer */
+        uint8_t *p;             /* Pointer into raw data buffer */
+        size_t	size;           /* Index block size on disk */
+        uint32_t metadata_chksum; /* Computed metadata checksum value */
+
+        /* Wrap the local buffer for serialized info */
+        if(NULL == (wb = H5WB_wrap(ser_buf, sizeof(ser_buf))))
+            H5E_THROW(H5E_CANTINIT, "can't wrap buffer")
+
+        /* Compute the size of the data block on disk */
+        if(!dblock->npages)
+            size = (size_t)dblock->size;
+        else
+            size = H5FA_DBLOCK_PREFIX_SIZE(dblock);
+
+        /* Get a pointer to a buffer that's large enough for serialized info */
+        if(NULL == (buf = (uint8_t *)H5WB_actual(wb, size)))
+            H5E_THROW(H5E_CANTGET, "can't get actual buffer")
+
+        /* Get temporary pointer to serialized info */
+        p = buf;
+
+        /* Magic number */
+        HDmemcpy(p, H5FA_DBLOCK_MAGIC, (size_t)H5_SIZEOF_MAGIC);
+        p += H5_SIZEOF_MAGIC;
+
+        /* Version # */
+        *p++ = H5FA_DBLOCK_VERSION;
+
+        /* Address of array header for array which owns this block */
+        H5F_addr_encode(f, &p, dblock->hdr->addr);
+
+        /* Fixed array type */
+        *p++ = dblock->hdr->cparam.cls->id;
+
+        /* Page init flags */
+	if(dblock->npages > 0) {
+	    /* Store the 'page init' bitmasks */
+            HDmemcpy(p, dblock->dblk_page_init, dblock->dblk_page_init_size);
+            p += dblock->dblk_page_init_size;
+	} /* end if */
+
+        /* Only encode elements if the data block is not paged */
+        if(!dblock->npages) {
+            /* Encode elements in data block */
+
+            /* Convert from native elements in memory into raw elements on disk */
+            H5_CHECK_OVERFLOW(dblock->hdr->cparam.nelmts, /* From: */hsize_t, /* To: */size_t);
+            if((dblock->hdr->cparam.cls->encode)(p, dblock->elmts, (size_t)dblock->hdr->cparam.nelmts, dblock->hdr->cb_ctx) < 0)
+                H5E_THROW(H5E_CANTENCODE, "can't encode fixed array data elements")
+            p += (dblock->hdr->cparam.nelmts * dblock->hdr->cparam.raw_elmt_size);
+        } /* end if */
+
+        /* Compute metadata checksum */
+        metadata_chksum = H5_checksum_metadata(buf, (size_t)(p - buf), 0);
+
+        /* Metadata checksum */
+        UINT32ENCODE(p, metadata_chksum);
+
+	/* Write the data block */
+        HDassert((size_t)(p - buf) == size);
+	if(H5F_block_write(f, H5FD_MEM_FARRAY_DBLOCK, addr, size, dxpl_id, buf) < 0)
+            H5E_THROW(H5E_WRITEERROR, "unable to save fixed array data block to disk")
+
+	dblock->cache_info.is_dirty = FALSE;
+    } /* end if */
+
+    if(destroy)
+        if(H5FA__cache_dblock_dest(f, dblock) < 0)
+            H5E_THROW(H5E_CANTFREE, "unable to destroy fixed array data block")
+
+CATCH
+
+    /* Release resources */
+    if(wb && H5WB_unwrap(wb) < 0)
+	H5E_THROW(H5E_CLOSEERROR, "can't close wrapped buffer")
+
+END_FUNC(STATIC)   /* end H5FA__cache_dblock_flush() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__cache_dblock_clear
+ *
+ * Purpose:	Mark a fixed array data block in memory as non-dirty.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(STATIC, ERR,
+herr_t, SUCCEED, FAIL,
+H5FA__cache_dblock_clear(H5F_t *f, H5FA_dblock_t *dblock, hbool_t destroy))
+
+    /* Sanity check */
+    HDassert(dblock);
+
+    /* Reset the dirty flag */
+    dblock->cache_info.is_dirty = FALSE;
+
+    if(destroy)
+        if(H5FA__cache_dblock_dest(f, dblock) < 0)
+            H5E_THROW(H5E_CANTFREE, "unable to destroy fixed array data block")
+
+CATCH
+
+END_FUNC(STATIC)   /* end H5FA__cache_dblock_clear() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__cache_dblock_size
+ *
+ * Purpose:	Compute the size in bytes of a fixed array data block
+ *		on disk, and return it in *size_ptr.  On failure,
+ *		the value of *size_ptr is undefined.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+/* ARGSUSED */
+BEGIN_FUNC(STATIC, NOERR,
+herr_t, SUCCEED, -,
+H5FA__cache_dblock_size(const H5F_t UNUSED *f, const H5FA_dblock_t *dblock,
+    size_t *size_ptr))
+
+    /* Sanity check */
+    HDassert(f);
+    HDassert(dblock);
+    HDassert(size_ptr);
+
+    /* Set size value */
+    if(!dblock->npages)
+        *size_ptr = (size_t)dblock->size;
+    else
+        *size_ptr = H5FA_DBLOCK_PREFIX_SIZE(dblock);
+
+END_FUNC(STATIC)   /* end H5FA__cache_dblock_size() */ 
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__cache_dblock_dest
+ *
+ * Purpose:	Destroys a fixed array data block in memory.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+/* ARGSUSED */
+BEGIN_FUNC(STATIC, ERR,
+herr_t, SUCCEED, FAIL,
+H5FA__cache_dblock_dest(H5F_t *f, H5FA_dblock_t *dblock))
+
+    /* Sanity check */
+    HDassert(f);
+    HDassert(dblock);
+
+    /* Verify that data block is clean */
+    HDassert(dblock->cache_info.is_dirty == FALSE);
+
+    /* If we're going to free the space on disk, the address must be valid */
+    HDassert(!dblock->cache_info.free_file_space_on_destroy || H5F_addr_defined(dblock->cache_info.addr));
+
+    /* Check for freeing file space for fixed array data block */
+    if(dblock->cache_info.free_file_space_on_destroy) {
+        /* Sanity check address */
+        HDassert(H5F_addr_eq(dblock->addr, dblock->cache_info.addr));
+
+        /* Release the space on disk */
+        /* (Includes space for pages!) */
+        /* (XXX: Nasty usage of internal DXPL value! -QAK) */
+        if(H5MF_xfree(f, H5FD_MEM_FARRAY_DBLOCK, H5AC_dxpl_id, dblock->cache_info.addr, (hsize_t)dblock->size) < 0)
+            H5E_THROW(H5E_CANTFREE, "unable to free fixed array data block")
+    } /* end if */
+
+    /* Release the data block */
+    if(H5FA__dblock_dest(f, dblock) < 0)
+        H5E_THROW(H5E_CANTFREE, "can't free fixed array data block")
+
+CATCH
+
+END_FUNC(STATIC)   /* end H5FA__cache_dblock_dest() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__cache_dblk_page_load
+ *
+ * Purpose:	Loads a fixed array data block page from the disk.
+ *
+ * Return:	Success:	Pointer to a new fixed array data block page
+ *		Failure:	NULL
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(STATIC, ERR,
+H5FA_dblk_page_t *, NULL, NULL,
+H5FA__cache_dblk_page_load(H5F_t *f, hid_t dxpl_id, haddr_t addr,
+    const void *_udata1, void *_hdr))
+
+    /* Local variables */
+    H5FA_hdr_t          *hdr = (H5FA_hdr_t *)_hdr;  /* Shared fixed array information */
+    const H5FA_dblk_page_load_ud_t *ud_load = (const H5FA_dblk_page_load_ud_t *)_udata1; /* User data for loading data block page */
+    H5FA_dblk_page_t	*dblk_page = NULL; /* Data block page info */
+    size_t		size;           /* Data block page size */
+    H5WB_t              *wb = NULL;     /* Wrapped buffer for data block page data */
+    uint8_t             dblk_page_buf[H5FA_DBLK_PAGE_BUF_SIZE]; /* Buffer for data block page */
+    uint8_t		*buf;           /* Pointer to data block page buffer */
+    const uint8_t	*p;             /* Pointer into raw data buffer */
+    uint32_t            stored_chksum;  /* Stored metadata checksum value */
+    uint32_t            computed_chksum; /* Computed metadata checksum value */
+
+    /* Sanity check */
+    HDassert(f);
+    HDassert(H5F_addr_defined(addr));
+    HDassert(hdr);
+#ifdef QAK
+HDfprintf(stderr, "%s: addr = %a\n", FUNC, addr);
+#endif /* QAK */
+
+    /* Allocate the fixed array data block page */
+    if(NULL == (dblk_page = H5FA__dblk_page_alloc(hdr, ud_load->nelmts)))
+	H5E_THROW(H5E_CANTALLOC, "memory allocation failed for fixed array data block page")
+
+    /* Set the fixed array data block's information */
+    dblk_page->addr = addr;
+
+    /* Wrap the local buffer for serialized info */
+    if(NULL == (wb = H5WB_wrap(dblk_page_buf, sizeof(dblk_page_buf))))
+	H5E_THROW(H5E_CANTINIT, "can't wrap buffer")
+
+    /* Compute the size of the fixed array data block page on disk */
+    size = H5FA_DBLK_PAGE_SIZE(dblk_page, ud_load->nelmts);
+
+    /* Get a pointer to a buffer that's large enough for serialized info */
+    if(NULL == (buf = (uint8_t *)H5WB_actual(wb, size)))
+	H5E_THROW(H5E_CANTGET, "can't get actual buffer")
+
+    /* Read data block page from disk */
+    if(H5F_block_read(f, H5FD_MEM_FARRAY_DBLK_PAGE, addr, size, dxpl_id, buf) < 0)
+	H5E_THROW(H5E_READERROR, "can't read fixed array data block page")
+
+    /* Get temporary pointer to serialized header */
+    p = buf;
+
+    /* Internal information */
+
+    /* Decode elements in data block page */
+    /* Convert from raw elements on disk into native elements in memory */
+    if((hdr->cparam.cls->decode)(p, dblk_page->elmts, ud_load->nelmts, hdr->cb_ctx) < 0)
+        H5E_THROW(H5E_CANTDECODE, "can't decode fixed array data elements")
+    p += (ud_load->nelmts * hdr->cparam.raw_elmt_size);
+
+    /* Sanity check */
+    /* (allow for checksum not decoded yet) */
+    HDassert((size_t)(p - buf) == (size - H5FA_SIZEOF_CHKSUM));
+
+    /* Set the data block page's size */
+    dblk_page->size = size;
+
+    /* Compute checksum on data block */
+    computed_chksum = H5_checksum_metadata(buf, (size_t)(p - buf), 0);
+
+    /* Metadata checksum */
+    UINT32DECODE(p, stored_chksum);
+
+    /* Sanity check */
+    HDassert((size_t)(p - buf) == dblk_page->size);
+
+    /* Verify checksum */
+    if(stored_chksum != computed_chksum)
+	H5E_THROW(H5E_BADVALUE, "incorrect metadata checksum for fixed array data block page")
+
+    /* Set return value */
+    ret_value = dblk_page;
+
+CATCH
+
+    /* Release resources */
+    if(wb && H5WB_unwrap(wb) < 0)
+	H5E_THROW(H5E_CLOSEERROR, "can't close wrapped buffer")
+    if(!ret_value)
+        if(dblk_page && H5FA__cache_dblk_page_dest(f, dblk_page) < 0)
+            H5E_THROW(H5E_CANTFREE, "unable to destroy fixed array data block page")
+
+END_FUNC(STATIC)   /* end H5FA__cache_dblk_page_load() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__cache_dblk_page_flush
+ *
+ * Purpose:	Flushes a dirty fixed array data block page to disk.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(STATIC, ERR,
+herr_t, SUCCEED, FAIL,
+H5FA__cache_dblk_page_flush(H5F_t *f, hid_t dxpl_id, hbool_t destroy, haddr_t addr,
+    H5FA_dblk_page_t *dblk_page, unsigned UNUSED * flags_ptr))
+
+    /* Local variables */
+    H5WB_t *wb = NULL;                  /* Wrapped buffer for serializing data */
+    uint8_t ser_buf[H5FA_DBLK_PAGE_BUF_SIZE]; /* Serialization buffer */
+
+    /* Sanity check */
+    HDassert(f);
+    HDassert(H5F_addr_defined(addr));
+    HDassert(dblk_page);
+    HDassert(dblk_page->hdr);
+
+    if(dblk_page->cache_info.is_dirty) {
+        uint8_t	*buf;           /* Temporary raw data buffer */
+        uint8_t *p;             /* Pointer into raw data buffer */
+        size_t	size;           /* Index block size on disk */
+        uint32_t metadata_chksum; /* Computed metadata checksum value */
+
+        /* Wrap the local buffer for serialized info */
+        if(NULL == (wb = H5WB_wrap(ser_buf, sizeof(ser_buf))))
+            H5E_THROW(H5E_CANTINIT, "can't wrap buffer")
+
+        /* Compute the size of the data block on disk */
+        size = dblk_page->size;
+
+        /* Get a pointer to a buffer that's large enough for serialized info */
+        if(NULL == (buf = (uint8_t *)H5WB_actual(wb, size)))
+            H5E_THROW(H5E_CANTGET, "can't get actual buffer")
+
+        /* Get temporary pointer to serialized info */
+        p = buf;
+
+        /* Internal information */
+
+        /* Encode elements in data block page */
+
+        /* Convert from native elements in memory into raw elements on disk */
+        if((dblk_page->hdr->cparam.cls->encode)(p, dblk_page->elmts, dblk_page->nelmts, dblk_page->hdr->cb_ctx) < 0)
+            H5E_THROW(H5E_CANTENCODE, "can't encode fixed array data elements")
+        p += (dblk_page->nelmts * dblk_page->hdr->cparam.raw_elmt_size);
+
+        /* Compute metadata checksum */
+        metadata_chksum = H5_checksum_metadata(buf, (size_t)(p - buf), 0);
+
+        /* Metadata checksum */
+        UINT32ENCODE(p, metadata_chksum);
+
+	/* Write the data block */
+        HDassert((size_t)(p - buf) == size);
+	if(H5F_block_write(f, H5FD_MEM_FARRAY_DBLK_PAGE, addr, size, dxpl_id, buf) < 0)
+            H5E_THROW(H5E_WRITEERROR, "unable to save fixed array data block page to disk")
+
+	dblk_page->cache_info.is_dirty = FALSE;
+    } /* end if */
+
+    if(destroy)
+        if(H5FA__cache_dblk_page_dest(f, dblk_page) < 0)
+            H5E_THROW(H5E_CANTFREE, "unable to destroy fixed array data block page")
+
+CATCH
+
+    /* Release resources */
+    if(wb && H5WB_unwrap(wb) < 0)
+	H5E_THROW(H5E_CLOSEERROR, "can't close wrapped buffer")
+
+END_FUNC(STATIC)   /* end H5FA__cache_dblk_page_flush() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__cache_dblk_page_clear
+ *
+ * Purpose:	Mark a fixed array data block page in memory as non-dirty.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(STATIC, ERR,
+herr_t, SUCCEED, FAIL,
+H5FA__cache_dblk_page_clear(H5F_t *f, H5FA_dblk_page_t *dblk_page, hbool_t destroy))
+
+    /* Sanity check */
+    HDassert(dblk_page);
+
+    /* Reset the dirty flag */
+    dblk_page->cache_info.is_dirty = FALSE;
+
+    if(destroy)
+        if(H5FA__cache_dblk_page_dest(f, dblk_page) < 0)
+            H5E_THROW(H5E_CANTFREE, "unable to destroy fixed array data block page")
+
+CATCH
+
+END_FUNC(STATIC)   /* end H5FA__cache_dblk_page_clear() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__cache_dblk_page_size
+ *
+ * Purpose:	Compute the size in bytes of a fixed array data block page
+ *		on disk, and return it in *size_ptr.  On failure,
+ *		the value of *size_ptr is undefined.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+/* ARGSUSED */
+BEGIN_FUNC(STATIC, NOERR,
+herr_t, SUCCEED, -,
+H5FA__cache_dblk_page_size(const H5F_t UNUSED *f, const H5FA_dblk_page_t *dblk_page,
+    size_t *size_ptr))
+
+    /* Sanity check */
+    HDassert(f);
+    HDassert(dblk_page);
+    HDassert(size_ptr);
+
+    /* Set size value */
+    *size_ptr = dblk_page->size;
+
+END_FUNC(STATIC)   /* end H5FA__cache_dblk_page_size() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__cache_dblk_page_dest
+ *
+ * Purpose:	Destroys a fixed array data block page in memory.
+ *
+ * Note:	Does _not_ free the space for the page on disk, that is
+ *              handled through the data block that "owns" the page.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+/* ARGSUSED */
+BEGIN_FUNC(STATIC, ERR,
+herr_t, SUCCEED, FAIL,
+H5FA__cache_dblk_page_dest(H5F_t UNUSED *f, H5FA_dblk_page_t *dblk_page))
+
+    /* Sanity check */
+    HDassert(f);
+    HDassert(dblk_page);
+
+    /* Verify that data block page is clean */
+    HDassert(dblk_page->cache_info.is_dirty == FALSE);
+
+    /* Release the data block page */
+    if(H5FA__dblk_page_dest(dblk_page) < 0)
+        H5E_THROW(H5E_CANTFREE, "can't free fixed array data block page")
+
+CATCH
+
+END_FUNC(STATIC)   /* end H5FA__cache_dblk_page_dest() */
+
diff --git a/src/H5FAdbg.c b/src/H5FAdbg.c
new file mode 100644
index 0000000..b882c04
--- /dev/null
+++ b/src/H5FAdbg.c
@@ -0,0 +1,321 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*-------------------------------------------------------------------------
+ *
+ * Created:		H5FAdbg.c
+ *
+ * Purpose:		Dump debugging information about a fixed array.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+/**********************/
+/* Module Declaration */
+/**********************/
+
+#define H5FA_MODULE
+
+
+/***********************/
+/* Other Packages Used */
+/***********************/
+
+
+/***********/
+/* Headers */
+/***********/
+#include "H5private.h"		/* Generic Functions			*/
+#include "H5Eprivate.h"		/* Error handling		  	*/
+#include "H5FApkg.h"		/* Fixed Arrays				*/
+#include "H5Oprivate.h"		/* Object Header 			*/
+#include "H5Vprivate.h"         /* Vector functions                     */
+
+
+/****************/
+/* Local Macros */
+/****************/
+
+
+/******************/
+/* Local Typedefs */
+/******************/
+
+/* Fixed array create/open user data */
+typedef struct ctx_ud_t {
+    const H5F_t *f;             /* Pointer to file info */
+    const H5O_layout_t *layout; /* Pointer to layout info */
+} ctx_ud_t;
+
+
+/********************/
+/* Package Typedefs */
+/********************/
+
+
+/********************/
+/* Local Prototypes */
+/********************/
+
+
+/*********************/
+/* Package Variables */
+/*********************/
+
+
+/*****************************/
+/* Library Private Variables */
+/*****************************/
+
+
+/*******************/
+/* Local Variables */
+/*******************/
+
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__hdr_debug
+ *
+ * Purpose:	Prints debugging info about a fixed array header.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PKG, ERR,
+herr_t, SUCCEED, FAIL,
+H5FA__hdr_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
+    int fwidth, const H5FA_class_t *cls, haddr_t obj_addr))
+
+    /* Local variables */
+    H5FA_hdr_t *hdr = NULL; 	/* Shared fixed array header */
+    H5O_loc_t obj_loc;		/* Pointer to an object's location */
+    H5O_layout_t layout;	/* Layout message */
+    ctx_ud_t udata;		/* User data */
+
+    /* Check arguments */
+    HDassert(f);
+    HDassert(H5F_addr_defined(addr));
+    HDassert(H5F_addr_defined(obj_addr));
+    HDassert(stream);
+    HDassert(indent >= 0);
+    HDassert(fwidth >= 0);
+    HDassert(cls);
+
+    H5O_loc_reset(&obj_loc);
+    obj_loc.file = f;
+    obj_loc.addr = obj_addr;
+
+    /* Open the object header where the layout message resides */
+    if(H5O_open(&obj_loc) < 0)
+	H5E_THROW(H5E_CANTPROTECT, "unable to open object header")
+
+    /* Read the layout message */
+    if(NULL == H5O_msg_read(&obj_loc, H5O_LAYOUT_ID, &layout, dxpl_id))
+	H5E_THROW(H5E_CANTPROTECT, "unable to read layout message")
+
+    /* close the object header */
+    if(H5O_close(&obj_loc) < 0)
+	H5E_THROW(H5E_CANTPROTECT, "unable to close object header")
+
+    /* Create user data */
+    udata.f = f;
+    udata.layout = &layout;
+
+    /* Load the fixed array header */
+    if(NULL == (hdr = (H5FA_hdr_t *)H5AC_protect(f, dxpl_id, H5AC_FARRAY_HDR, addr, cls, &udata, H5AC_READ)))
+	H5E_THROW(H5E_CANTPROTECT, "unable to load fixed array header")
+
+    /* Print opening message */
+    HDfprintf(stream, "%*sFixed Array Header...\n", indent, "");
+
+    /* Print the values */
+    HDfprintf(stream, "%*s%-*s %s\n", indent, "", fwidth,
+	      "Array class ID:", hdr->cparam.cls->name);
+    HDfprintf(stream, "%*s%-*s %Zu\n", indent, "", fwidth,
+	      "Header size:",
+	      hdr->size);
+    HDfprintf(stream, "%*s%-*s %u\n", indent, "", fwidth,
+	      "Raw Element Size:",
+	      (unsigned)hdr->cparam.raw_elmt_size);
+    HDfprintf(stream, "%*s%-*s %Zu\n", indent, "", fwidth,
+	      "Native Element Size (on this platform):",
+	      hdr->cparam.cls->nat_elmt_size);
+
+
+    HDfprintf(stream, "%*s%-*s %u\n", indent, "", fwidth,
+	      "Max. # of elements in data block page:",
+	      (unsigned)((size_t)1 << hdr->cparam.max_dblk_page_nelmts_bits));
+
+    HDfprintf(stream, "%*s%-*s %Hu\n", indent, "", fwidth,
+	      "Number of elements in Fixed Array:", hdr->stats.nelmts);
+
+    HDfprintf(stream, "%*s%-*s %a\n", indent, "", fwidth,
+	      "Fixed Array Data Block Address:", hdr->dblk_addr);
+
+CATCH
+    if(hdr && H5AC_unprotect(f, dxpl_id, H5AC_FARRAY_HDR, addr, hdr, H5AC__NO_FLAGS_SET) < 0)
+	H5E_THROW(H5E_CANTUNPROTECT, "unable to release fixed array header")
+
+END_FUNC(PKG)   /* end H5FA__hdr_debug() */
+
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__dblock_debug
+ *
+ * Purpose:	Prints debugging info about a fixed array data block.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PKG, ERR,
+herr_t, SUCCEED, FAIL,
+H5FA__dblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
+    int fwidth, const H5FA_class_t *cls, haddr_t hdr_addr, haddr_t obj_addr))
+
+    /* Local variables */
+    H5FA_hdr_t *hdr = NULL;             /* Shared fixed array header */
+    H5FA_dblock_t *dblock = NULL;       /* Fixed array data block */
+    size_t u;                           /* Local index variable */
+    H5O_loc_t obj_loc;		/* Pointer to an object's location */
+    H5O_layout_t layout;	/* Layout message */
+    ctx_ud_t udata;		/* User data */
+
+    /* Check arguments */
+    HDassert(f);
+    HDassert(H5F_addr_defined(addr));
+    HDassert(stream);
+    HDassert(indent >= 0);
+    HDassert(fwidth >= 0);
+    HDassert(cls);
+    HDassert(H5F_addr_defined(hdr_addr));
+    HDassert(H5F_addr_defined(obj_addr));
+
+    H5O_loc_reset(&obj_loc);
+    obj_loc.file = f;
+    obj_loc.addr = obj_addr;
+
+    /* Open the object header where the layout message resides */
+    if(H5O_open(&obj_loc) < 0)
+	H5E_THROW(H5E_CANTPROTECT, "unable to open object header")
+
+    /* Read the layout message */
+    if(NULL == H5O_msg_read(&obj_loc, H5O_LAYOUT_ID, &layout, dxpl_id))
+        H5E_THROW(H5E_CANTPROTECT, "unable to read layout message")
+
+    /* close the object header */
+    if(H5O_close(&obj_loc) < 0)
+	H5E_THROW(H5E_CANTPROTECT, "unable to close object header")
+
+    /* Create user data */
+    udata.f = f;
+    udata.layout = &layout;
+
+    /* Load the fixed array header */
+    if(NULL == (hdr = (H5FA_hdr_t *)H5AC_protect(f, dxpl_id, H5AC_FARRAY_HDR, hdr_addr, cls, &udata, H5AC_READ)))
+	H5E_THROW(H5E_CANTPROTECT, "unable to load fixed array header")
+
+    /* Protect data block */
+    if(NULL == (dblock = H5FA__dblock_protect(hdr, dxpl_id, addr, hdr->cparam.nelmts, H5AC_READ)))
+        H5E_THROW(H5E_CANTPROTECT, "unable to protect fixed array data block, address = %llu", (unsigned long long)addr)
+
+    /* Print opening message */
+    HDfprintf(stream, "%*sFixed Array data Block...\n", indent, "");
+
+
+    /* Print the values */
+    HDfprintf(stream, "%*s%-*s %s\n", indent, "", fwidth,
+	      "Array class ID:", hdr->cparam.cls->name);
+    HDfprintf(stream, "%*s%-*s %a\n", indent, "", fwidth, "Address of Data Block:", dblock->addr);
+    HDfprintf(stream, "%*s%-*s %Zu\n", indent, "", fwidth, "Data Block size:", dblock->size);
+    HDfprintf(stream, "%*s%-*s %Hu\n", indent, "", fwidth,
+	      "Number of elements in Data Block:", hdr->cparam.nelmts);
+    HDfprintf(stream, "%*s%-*s %Hu\n", indent, "", fwidth,
+	      "Number of pages in Data Block:", dblock->npages);
+    HDfprintf(stream, "%*s%-*s %Hu\n", indent, "", fwidth,
+	      "Number of elements per Data Block page:", dblock->dblk_page_nelmts);
+
+    if(dblock->npages) { /* paging */
+        size_t  dblk_page_nelmts;	/* # of elements in a data block page */
+        haddr_t dblk_page_addr;     /* Address of a data block page */
+        size_t  page_idx;           /* Page index within data block */
+
+	HDfprintf(stream, "%*sPaging:\n", indent, "");
+
+	/* Iterate over the pages */
+	dblk_page_addr = dblock->addr + H5FA_DBLOCK_PREFIX_SIZE(dblock);
+	dblk_page_nelmts = dblock->dblk_page_nelmts;
+
+	/* Read and print each page's elements in the data block */
+	for(page_idx = 0; page_idx < dblock->npages; page_idx++) {
+	    if(!H5V_bit_get(dblock->dblk_page_init, page_idx)) {
+		HDfprintf(stream, "%*s%-*s %Hu %s\n", indent, "", fwidth,
+		    "Page %Zu:", page_idx, "empty");
+
+	    } /* end if */
+            else { /* get the page */
+                H5FA_dblk_page_t *dblk_page;    /* Pointer to a data block page */
+                hsize_t  nelmts_left;	        /* Remaining elements in the last data block page */
+
+                /* Check for last page */
+		if(((page_idx + 1) == dblock->npages) && (nelmts_left = hdr->cparam.nelmts % dblock->dblk_page_nelmts))
+		    dblk_page_nelmts = (size_t)nelmts_left;
+
+		if(NULL == (dblk_page = H5FA__dblk_page_protect(hdr, dxpl_id, dblk_page_addr, dblk_page_nelmts, H5AC_READ)))
+		    H5E_THROW(H5E_CANTPROTECT, "unable to protect fixed array data block page, address = %llu", (unsigned long long)dblk_page_addr)
+
+		HDfprintf(stream, "%*sElements in page %Zu:\n", indent, "", page_idx);
+		for(u = 0; u < dblk_page_nelmts; u++) {
+		    /* Call the class's 'debug' callback */
+		    if((hdr->cparam.cls->debug)(stream, (indent + 3), MAX(0, (fwidth - 3)), (hsize_t)u,
+			    ((uint8_t *)dblk_page->elmts) + (hdr->cparam.cls->nat_elmt_size * u)) < 0)
+			H5E_THROW(H5E_CANTGET, "can't get element for debugging")
+		} /* end for */
+		if(H5FA__dblk_page_unprotect(dblk_page, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+		    H5E_THROW(H5E_CANTUNPROTECT, "unable to release fixed array data block page")
+
+		/* Advance to next page address */
+		dblk_page_addr += dblock->dblk_page_size;
+	    } /* paging */
+	} /* end for npages */
+    } /* end if */
+    else { /* not paging */
+	/* Print the elements in the data block */
+	HDfprintf(stream, "%*sElements:\n", indent, "");
+	for(u = 0; u < hdr->cparam.nelmts; u++) {
+	    /* Call the class's 'debug' callback */
+	    if((hdr->cparam.cls->debug)(stream, (indent + 3), MAX(0, (fwidth - 3)), (hsize_t)u,
+		    ((uint8_t *)dblock->elmts) + (hdr->cparam.cls->nat_elmt_size * u)) < 0)
+		H5E_THROW(H5E_CANTGET, "can't get element for debugging")
+	} /* end for */
+    } /* end else */
+
+CATCH
+    if(dblock && H5FA__dblock_unprotect(dblock, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+        H5E_THROW(H5E_CANTUNPROTECT, "unable to release fixed array data block")
+    if(hdr && H5AC_unprotect(f, dxpl_id, H5AC_FARRAY_HDR, hdr_addr, hdr, H5AC__NO_FLAGS_SET) < 0)
+	H5E_THROW(H5E_CANTUNPROTECT, "unable to release fixed array header")
+
+END_FUNC(PKG)   /* end H5FA__dblock_debug() */
+
diff --git a/src/H5FAdblkpage.c b/src/H5FAdblkpage.c
new file mode 100644
index 0000000..dde299f
--- /dev/null
+++ b/src/H5FAdblkpage.c
@@ -0,0 +1,312 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*-------------------------------------------------------------------------
+ *
+ * Created:		H5FAdblkpage.c
+ *
+ * Purpose:		Data block page routines for fixed array.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+/**********************/
+/* Module Declaration */
+/**********************/
+
+#define H5FA_MODULE
+
+
+/***********************/
+/* Other Packages Used */
+/***********************/
+
+
+/***********/
+/* Headers */
+/***********/
+#include "H5private.h"		/* Generic Functions			*/
+#include "H5Eprivate.h"		/* Error handling		  	*/
+#include "H5FApkg.h"		/* Fixed Arrays				*/
+#include "H5FLprivate.h"	/* Free Lists                           */
+
+
+/****************/
+/* Local Macros */
+/****************/
+
+
+/******************/
+/* Local Typedefs */
+/******************/
+
+
+/********************/
+/* Package Typedefs */
+/********************/
+
+
+/********************/
+/* Local Prototypes */
+/********************/
+
+
+/*********************/
+/* Package Variables */
+/*********************/
+
+
+/*****************************/
+/* Library Private Variables */
+/*****************************/
+
+
+/*******************/
+/* Local Variables */
+/*******************/
+
+/* Declare a free list to manage the H5FA_dblk_page_t struct */
+H5FL_DEFINE_STATIC(H5FA_dblk_page_t);
+
+/* Declare a free list to manage the page elements */
+H5FL_BLK_DEFINE(page_elmts);
+
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__dblk_page_alloc
+ *
+ * Purpose:	Allocate fixed array data block page
+ *
+ * Return:	Non-NULL pointer to data block on success/NULL on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PKG, ERR,
+H5FA_dblk_page_t *, NULL, NULL,
+H5FA__dblk_page_alloc(H5FA_hdr_t *hdr, size_t nelmts))
+
+    /* Local variables */
+    H5FA_dblk_page_t *dblk_page = NULL;          /* Fixed array data block page */
+
+    /* Check arguments */
+    HDassert(hdr);
+
+    /* Allocate memory for the data block */
+    if(NULL == (dblk_page = H5FL_CALLOC(H5FA_dblk_page_t)))
+	H5E_THROW(H5E_CANTALLOC, "memory allocation failed for fixed array data block page")
+
+    /* Share common array information */
+    if(H5FA__hdr_incr(hdr) < 0)
+	H5E_THROW(H5E_CANTINC, "can't increment reference count on shared array header")
+    dblk_page->hdr = hdr;
+
+    /* Set non-zero internal fields */
+    dblk_page->nelmts = nelmts;
+
+    /* Allocate buffer for elements in data block page */
+    if(NULL == (dblk_page->elmts = H5FL_BLK_MALLOC(page_elmts, nelmts * hdr->cparam.cls->nat_elmt_size)))
+        H5E_THROW(H5E_CANTALLOC, "memory allocation failed for data block page element buffer")
+
+    /* Set the return value */
+    ret_value = dblk_page;
+
+CATCH
+
+    if(!ret_value)
+        if(dblk_page && H5FA__dblk_page_dest(dblk_page) < 0)
+            H5E_THROW(H5E_CANTFREE, "unable to destroy fixed array data block page")
+
+END_FUNC(PKG)   /* end H5FA__dblk_page_alloc() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__dblk_page_create
+ *
+ * Purpose:	Creates a new fixed array data block page in the file
+ *
+ * Return:	Valid file address on success/HADDR_UNDEF on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PKG, ERR,
+herr_t, SUCCEED, FAIL,
+H5FA__dblk_page_create(H5FA_hdr_t *hdr, hid_t dxpl_id, haddr_t addr, size_t nelmts))
+
+    /* Local variables */
+    H5FA_dblk_page_t *dblk_page = NULL;      /* Fixed array data block page */
+
+#ifdef H5FA_DEBUG
+HDfprintf(stderr, "%s: Called, addr = %a\n", FUNC, addr);
+#endif /* H5FA_DEBUG */
+
+    /* Sanity check */
+    HDassert(hdr);
+
+    /* Allocate the data block page */
+    if(NULL == (dblk_page = H5FA__dblk_page_alloc(hdr, nelmts)))
+	H5E_THROW(H5E_CANTALLOC, "memory allocation failed for fixed array data block page")
+
+    /* Set info about data block page on disk */
+    dblk_page->addr = addr;
+    dblk_page->size = H5FA_DBLK_PAGE_SIZE(dblk_page, nelmts);
+#ifdef H5FA_DEBUG 
+HDfprintf(stderr, "%s: dblk_page->size = %Zu\n", FUNC, dblk_page->size);
+#endif /* H5FA_DEBUG */
+
+    /* Clear any elements in data block page to fill value */
+    if((hdr->cparam.cls->fill)(dblk_page->elmts, nelmts) < 0)
+        H5E_THROW(H5E_CANTSET, "can't set fixed array data block page elements to class's fill value")
+
+    /* Cache the new fixed array data block page */
+    if(H5AC_set(hdr->f, dxpl_id, H5AC_FARRAY_DBLK_PAGE, dblk_page->addr, dblk_page, H5AC__NO_FLAGS_SET) < 0)
+	H5E_THROW(H5E_CANTINSERT, "can't add fixed array data block page to cache")
+
+CATCH
+    if(ret_value < 0)
+        if(dblk_page) {
+            /* Destroy data block page */
+            if(H5FA__dblk_page_dest(dblk_page) < 0)
+                H5E_THROW(H5E_CANTFREE, "unable to destroy fixed array data block page")
+        } /* end if */
+
+END_FUNC(PKG)   /* end H5FA__dblk_page_create() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__dblk_page_protect
+ *
+ * Purpose:	Convenience wrapper around protecting fixed array data
+ *              block page
+ *
+ * Return:	Non-NULL pointer to data block page on success/NULL on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PKG, ERR,
+H5FA_dblk_page_t *, NULL, NULL,
+H5FA__dblk_page_protect(H5FA_hdr_t *hdr, hid_t dxpl_id, haddr_t dblk_page_addr,
+    size_t dblk_page_nelmts, H5AC_protect_t rw))
+
+    /* Local variables */
+    H5FA_dblk_page_load_ud_t load_ud;      /* Information needed for loading data block page */
+
+#ifdef H5FA_DEBUG
+HDfprintf(stderr, "%s: Called\n", FUNC);
+#endif /* H5FA_DEBUG */
+
+    /* Sanity check */
+    HDassert(hdr);
+    HDassert(H5F_addr_defined(dblk_page_addr));
+
+    /* Set up user data */
+    load_ud.nelmts = dblk_page_nelmts;
+
+    /* Protect the data block page */
+    if(NULL == (ret_value = (H5FA_dblk_page_t *)H5AC_protect(hdr->f, dxpl_id, H5AC_FARRAY_DBLK_PAGE, dblk_page_addr, &load_ud, hdr, rw)))
+        H5E_THROW(H5E_CANTPROTECT, "unable to protect fixed array data block page, address = %llu", (unsigned long long)dblk_page_addr)
+
+CATCH
+
+END_FUNC(PKG)   /* end H5FA__dblk_page_protect() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__dblk_page_unprotect
+ *
+ * Purpose:	Convenience wrapper around unprotecting fixed array
+ *              data block page
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PKG, ERR,
+herr_t, SUCCEED, FAIL,
+H5FA__dblk_page_unprotect(H5FA_dblk_page_t *dblk_page, hid_t dxpl_id,
+    unsigned cache_flags))
+
+    /* Local variables */
+
+#ifdef H5FA_DEBUG
+HDfprintf(stderr, "%s: Called\n", FUNC);
+#endif /* H5FA_DEBUG */
+
+    /* Sanity check */
+    HDassert(dblk_page);
+
+    /* Unprotect the data block page */
+    if(H5AC_unprotect(dblk_page->hdr->f, dxpl_id, H5AC_FARRAY_DBLK_PAGE, dblk_page->addr, dblk_page, cache_flags) < 0)
+        H5E_THROW(H5E_CANTUNPROTECT, "unable to unprotect fixed array data block page, address = %llu", (unsigned long long)dblk_page->addr)
+
+CATCH
+
+END_FUNC(PKG)   /* end H5FA__dblk_page_unprotect() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__dblk_page_dest
+ *
+ * Purpose:	Destroys a fixed array data block page in memory.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+/* ARGSUSED */
+BEGIN_FUNC(PKG, ERR,
+herr_t, SUCCEED, FAIL,
+H5FA__dblk_page_dest(H5FA_dblk_page_t *dblk_page))
+
+    /* Sanity check */
+    HDassert(dblk_page);
+
+    /* Check if header field has been initialized */
+    if(dblk_page->hdr) {
+        /* Check if buffer for data block page elements has been initialized */
+        if(dblk_page->elmts) {
+            /* Free buffer for data block page elements */
+	    (void) H5FL_BLK_FREE(page_elmts, dblk_page->elmts);
+            dblk_page->elmts = NULL;
+        } /* end if */
+
+        /* Decrement reference count on shared info */
+        if(H5FA__hdr_decr(dblk_page->hdr) < 0)
+            H5E_THROW(H5E_CANTDEC, "can't decrement reference count on shared array header")
+        dblk_page->hdr = NULL;
+    } /* end if */
+
+    /* Free the data block page itself */
+    (void)H5FL_FREE(H5FA_dblk_page_t, dblk_page);
+
+CATCH
+
+END_FUNC(PKG)   /* end H5FA__dblk_page_dest() */
+
diff --git a/src/H5FAdblock.c b/src/H5FAdblock.c
new file mode 100644
index 0000000..f564fee
--- /dev/null
+++ b/src/H5FAdblock.c
@@ -0,0 +1,442 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*-------------------------------------------------------------------------
+ *
+ * Created:		H5FAdblock.c
+ *
+ * Purpose:		Data block routines for fixed arrays.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+/**********************/
+/* Module Declaration */
+/**********************/
+
+#define H5FA_MODULE
+
+
+/***********************/
+/* Other Packages Used */
+/***********************/
+
+
+/***********/
+/* Headers */
+/***********/
+#include "H5private.h"		/* Generic Functions			*/
+#include "H5Eprivate.h"		/* Error handling		  	*/
+#include "H5FApkg.h"		/* Fixed Arrays				*/
+#include "H5FLprivate.h"	/* Free Lists                           */
+#include "H5MFprivate.h"	/* File memory management		*/
+
+
+/****************/
+/* Local Macros */
+/****************/
+
+
+/******************/
+/* Local Typedefs */
+/******************/
+
+
+/********************/
+/* Package Typedefs */
+/********************/
+
+
+/********************/
+/* Local Prototypes */
+/********************/
+
+
+/*********************/
+/* Package Variables */
+/*********************/
+
+
+/*****************************/
+/* Library Private Variables */
+/*****************************/
+
+
+/*******************/
+/* Local Variables */
+/*******************/
+
+/* Declare a free list to manage the H5FA_dblock_t struct */
+H5FL_DEFINE_STATIC(H5FA_dblock_t);
+
+/* Declare a free list to manage the chunk elements */
+H5FL_BLK_DEFINE(chunk_elmts);
+
+/* Declare a free list to manage blocks of 'page init' bitmasks */
+H5FL_BLK_DEFINE(fa_page_init);
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__dblock_alloc
+ *
+ * Purpose:	Allocate fixed array data block
+ *
+ * Return:	Non-NULL pointer to data block on success/NULL on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PKG, ERR,
+H5FA_dblock_t *, NULL, NULL,
+H5FA__dblock_alloc(H5FA_hdr_t *hdr, hsize_t nelmts))
+
+    /* Local variables */
+    H5FA_dblock_t *dblock = NULL;          /* fixed array data block */
+
+    /* Check arguments */
+    HDassert(hdr);
+    HDassert(nelmts > 0);
+
+    /* Allocate memory for the data block */
+    if(NULL == (dblock = H5FL_CALLOC(H5FA_dblock_t)))
+	H5E_THROW(H5E_CANTALLOC, "memory allocation failed for fixed array data block")
+
+    /* Share common array information */
+    if(H5FA__hdr_incr(hdr) < 0)
+	H5E_THROW(H5E_CANTINC, "can't increment reference count on shared array header")
+    dblock->hdr = hdr;
+
+    /* Set non-zero internal fields */
+    dblock->dblk_page_nelmts = (size_t)1 << hdr->cparam.max_dblk_page_nelmts_bits;
+
+    /* Check if this data block should be paged */
+    if(nelmts > dblock->dblk_page_nelmts) {
+        /* Compute number of pages */
+        hsize_t npages = ((nelmts + dblock->dblk_page_nelmts) - 1) / dblock->dblk_page_nelmts;
+
+        /* Safely assign the number of pages */
+        H5_ASSIGN_OVERFLOW(/* To: */ dblock->npages, /* From: */ npages, /* From: */ hsize_t, /* To: */ size_t);
+
+	/* Sanity check that we have at least 1 page */
+	HDassert(dblock->npages > 0);
+
+        /* Compute size of 'page init' flag array, in bytes */
+	dblock->dblk_page_init_size = (dblock->npages + 7) / 8;
+	HDassert(dblock->dblk_page_init_size > 0);
+
+	/* Allocate space for 'page init' flags */
+	if(NULL == (dblock->dblk_page_init = H5FL_BLK_CALLOC(fa_page_init, dblock->dblk_page_init_size)))
+	    H5E_THROW(H5E_CANTALLOC, "memory allocation failed for page init bitmask")
+
+	/* Compute data block page size */
+	dblock->dblk_page_size = (dblock->dblk_page_nelmts * hdr->cparam.raw_elmt_size) + H5FA_SIZEOF_CHKSUM;
+
+        /* Compute the # of elements on last page */
+        if(0 == nelmts % dblock->dblk_page_nelmts)
+            dblock->last_page_nelmts = dblock->dblk_page_nelmts;
+        else
+            dblock->last_page_nelmts = (size_t)(nelmts % dblock->dblk_page_nelmts);
+    } /* end if */
+    else {
+        hsize_t dblk_size = hdr->cparam.nelmts * hdr->cparam.cls->nat_elmt_size;
+
+        /* Allocate buffer for elements in data block */
+        H5_CHECK_OVERFLOW(dblk_size, /* From: */hsize_t, /* To: */size_t);
+	if(NULL == (dblock->elmts = H5FL_BLK_MALLOC(chunk_elmts, (size_t)dblk_size)))
+	    H5E_THROW(H5E_CANTALLOC, "memory allocation failed for data block element buffer")
+    } /* end else */
+
+    /* Set the return value */
+    ret_value = dblock;
+
+CATCH
+
+    if(!ret_value)
+        if(dblock && H5FA__dblock_dest(hdr->f, dblock) < 0)
+            H5E_THROW(H5E_CANTFREE, "unable to destroy fixed array data block")
+
+END_FUNC(PKG)   /* end H5FA__dblock_alloc() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__dblock_create
+ *
+ * Purpose:	Creates a fixed array data block in the file
+ *
+ * Return:	Valid file address on success/HADDR_UNDEF on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PKG, ERR,
+haddr_t, HADDR_UNDEF, HADDR_UNDEF,
+H5FA__dblock_create(H5FA_hdr_t *hdr, hid_t dxpl_id, hbool_t *hdr_dirty,
+    hsize_t nelmts))
+
+    /* Local variables */
+    H5FA_dblock_t *dblock = NULL;       /* fixed array data block */
+    haddr_t dblock_addr;                /* fixed array data block address */
+
+#ifdef H5FA_DEBUG
+HDfprintf(stderr, "%s: Called, hdr->stats.nelmts = %Zu, nelmts = %Zu\n", FUNC, hdr->stats.nelmts, nelmts);
+#endif /* H5FA_DEBUG */
+
+    /* Sanity check */
+    HDassert(hdr);
+    HDassert(hdr_dirty);
+    HDassert(nelmts > 0);
+
+    /* Allocate the data block */
+    if(NULL == (dblock = H5FA__dblock_alloc(hdr, nelmts)))
+	H5E_THROW(H5E_CANTALLOC, "memory allocation failed for fixed array data block")
+
+    /* Set size of data block on disk */
+    hdr->stats.dblk_size = dblock->size = H5FA_DBLOCK_SIZE(dblock);
+#ifdef H5FA_DEBUG
+HDfprintf(stderr, "%s: dblock->size = %Zu\n", FUNC, dblock->size);
+#endif /* H5FA_DEBUG */
+
+
+    /* Allocate space for the data block on disk */
+    if(HADDR_UNDEF == (dblock_addr = H5MF_alloc(hdr->f, H5FD_MEM_FARRAY_DBLOCK, dxpl_id, (hsize_t)dblock->size)))
+	H5E_THROW(H5E_CANTALLOC, "file allocation failed for fixed array data block")
+    dblock->addr = dblock_addr;
+
+    /* Don't initialize elements if paged */
+    if(!dblock->npages)
+        /* Clear any elements in data block to fill value */
+        if((hdr->cparam.cls->fill)(dblock->elmts, (size_t)hdr->cparam.nelmts) < 0)
+            H5E_THROW(H5E_CANTSET, "can't set fixed array data block elements to class's fill value")
+
+    /* Cache the new fixed array data block */
+    if(H5AC_set(hdr->f, dxpl_id, H5AC_FARRAY_DBLOCK, dblock_addr, dblock, H5AC__NO_FLAGS_SET) < 0)
+	H5E_THROW(H5E_CANTINSERT, "can't add fixed array data block to cache")
+
+    /* Mark the header dirty (for updating statistics) */
+    *hdr_dirty = TRUE;
+
+    /* Set address of data block to return */
+    ret_value = dblock_addr;
+
+CATCH
+
+    if(!H5F_addr_defined(ret_value))
+        if(dblock) {
+            /* Release data block's disk space */
+            if(H5F_addr_defined(dblock->addr) && H5MF_xfree(hdr->f, H5FD_MEM_FARRAY_DBLOCK, dxpl_id, dblock->addr, (hsize_t)dblock->size) < 0)
+                H5E_THROW(H5E_CANTFREE, "unable to release fixed array data block")
+
+            /* Destroy data block */
+            if(H5FA__dblock_dest(hdr->f, dblock) < 0)
+                H5E_THROW(H5E_CANTFREE, "unable to destroy fixed array data block")
+        } /* end if */
+
+END_FUNC(PKG)   /* end H5FA__dblock_create() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__dblock_protect
+ *
+ * Purpose:	Convenience wrapper around protecting fixed array data block
+ *
+ * Return:	Non-NULL pointer to data block on success/NULL on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PKG, ERR,
+H5FA_dblock_t *, NULL, NULL,
+H5FA__dblock_protect(H5FA_hdr_t *hdr, hid_t dxpl_id, haddr_t dblk_addr,
+    hsize_t dblk_nelmts, H5AC_protect_t rw))
+
+    /* Local variables */
+
+#ifdef H5FA_DEBUG
+HDfprintf(stderr, "%s: Called\n", FUNC);
+#endif /* H5FA_DEBUG */
+
+    /* Sanity check */
+    HDassert(hdr);
+    HDassert(H5F_addr_defined(dblk_addr));
+    HDassert(dblk_nelmts);
+
+    /* Protect the data block */
+    if(NULL == (ret_value = (H5FA_dblock_t *)H5AC_protect(hdr->f, dxpl_id, H5AC_FARRAY_DBLOCK, dblk_addr, &dblk_nelmts, hdr, rw)))
+        H5E_THROW(H5E_CANTPROTECT, "unable to protect fixed array data block, address = %llu", (unsigned long long)dblk_addr)
+
+CATCH
+
+END_FUNC(PKG)   /* end H5FA__dblock_protect() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__dblock_unprotect
+ *
+ * Purpose:	Convenience wrapper around unprotecting fixed array data block
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PKG, ERR,
+herr_t, SUCCEED, FAIL,
+H5FA__dblock_unprotect(H5FA_dblock_t *dblock, hid_t dxpl_id, unsigned cache_flags))
+
+    /* Local variables */
+
+#ifdef H5FA_DEBUG
+HDfprintf(stderr, "%s: Called\n", FUNC);
+#endif /* H5FA_DEBUG */
+
+    /* Sanity check */
+    HDassert(dblock);
+
+    /* Unprotect the data block */
+    if(H5AC_unprotect(dblock->hdr->f, dxpl_id, H5AC_FARRAY_DBLOCK, dblock->addr, dblock, cache_flags) < 0)
+        H5E_THROW(H5E_CANTUNPROTECT, "unable to unprotect fixed array data block, address = %llu", (unsigned long long)dblock->addr)
+
+CATCH
+
+END_FUNC(PKG)   /* end H5FA__dblock_unprotect() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__dblock_delete
+ *
+ * Purpose:	Delete a data block
+ *
+ * Return:	SUCCEED/FAIL
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PKG, ERR,
+herr_t, SUCCEED, FAIL,
+H5FA__dblock_delete(H5FA_hdr_t *hdr, hid_t dxpl_id, haddr_t dblk_addr,
+    hsize_t dblk_nelmts))
+
+    /* Local variables */
+    H5FA_dblock_t *dblock = NULL;       /* Pointer to data block */
+
+#ifdef H5FA_DEBUG
+HDfprintf(stderr, "%s: Called\n", FUNC);
+#endif /* H5FA_DEBUG */
+
+    /* Sanity check */
+    HDassert(hdr);
+    HDassert(H5F_addr_defined(dblk_addr));
+    HDassert(dblk_nelmts > 0);
+
+    /* Protect data block */
+    if(NULL == (dblock = H5FA__dblock_protect(hdr, dxpl_id, dblk_addr, dblk_nelmts, H5AC_WRITE)))
+        H5E_THROW(H5E_CANTPROTECT, "unable to protect fixed array data block, address = %llu", (unsigned long long)dblk_addr)
+
+    /* Check if data block is paged */
+    if(dblock->npages) {
+        haddr_t dblk_page_addr;         /* Address of each data block page */
+        size_t u;                       /* Local index variable */
+
+        /* Set up initial state */
+        dblk_page_addr = dblk_addr + H5FA_DBLOCK_PREFIX_SIZE(dblock);
+
+        /* Iterate over pages in data block */
+        for(u = 0; u < dblock->npages; u++) {
+#ifdef H5FA_DEBUG
+HDfprintf(stderr, "%s: Expunging data block page from cache\n", FUNC);
+#endif /* H5FA_DEBUG */
+            /* Evict the data block page from the metadata cache */
+            /* (OK to call if it doesn't exist in the cache) */
+            if(H5AC_expunge_entry(hdr->f, dxpl_id, H5AC_FARRAY_DBLK_PAGE, dblk_page_addr, H5AC__NO_FLAGS_SET) < 0)
+                H5E_THROW(H5E_CANTEXPUNGE, "unable to remove array data block page from metadata cache")
+#ifdef H5FA_DEBUG
+HDfprintf(stderr, "%s: Done expunging data block page from cache\n", FUNC);
+#endif /* H5FA_DEBUG */
+
+            /* Advance to next page address */
+            dblk_page_addr += dblock->dblk_page_size;
+        } /* end for */
+    } /* end if */
+
+CATCH
+
+    /* Finished deleting data block in metadata cache */
+    if(dblock && H5FA__dblock_unprotect(dblock, dxpl_id, H5AC__DIRTIED_FLAG | H5AC__DELETED_FLAG | H5AC__FREE_FILE_SPACE_FLAG) < 0)
+        H5E_THROW(H5E_CANTUNPROTECT, "unable to release fixed array data block")
+
+END_FUNC(PKG)   /* end H5FA__dblock_delete() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__dblock_dest
+ *
+ * Purpose:	Destroys a fixed array data block in memory.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+/* ARGSUSED */
+BEGIN_FUNC(PKG, ERR,
+herr_t, SUCCEED, FAIL,
+H5FA__dblock_dest(H5F_t UNUSED *f, H5FA_dblock_t *dblock))
+
+    /* Sanity check */
+    HDassert(dblock);
+
+    /* Check if shared header field has been initialized */
+    if(dblock->hdr) {
+        /* Check if we've got elements in the data block */
+        if(dblock->elmts && !dblock->npages) {
+            /* Free buffer for data block elements */
+            HDassert(dblock->hdr->cparam.nelmts > 0);
+	    (void) H5FL_BLK_FREE(chunk_elmts, dblock->elmts);
+            dblock->elmts = NULL;
+        } /* end if */
+
+        /* Check if data block is paged */
+	if(dblock->npages) {
+	    /* Free buffer for 'page init' bitmask, if there is one */
+	    HDassert(dblock->dblk_page_init_size > 0);
+	    if(dblock->dblk_page_init)
+		dblock->dblk_page_init = H5FL_BLK_FREE(fa_page_init, dblock->dblk_page_init);
+	} /* end if */
+
+        /* Decrement reference count on shared info */
+        if(H5FA__hdr_decr(dblock->hdr) < 0)
+            H5E_THROW(H5E_CANTDEC, "can't decrement reference count on shared array header")
+        dblock->hdr = NULL;
+    } /* end if */
+
+    /* Free the data block itself */
+    (void)H5FL_FREE(H5FA_dblock_t, dblock);
+
+CATCH
+
+END_FUNC(PKG)   /* end H5FA__dblock_dest() */
+
diff --git a/src/H5FAhdr.c b/src/H5FAhdr.c
new file mode 100644
index 0000000..150742d
--- /dev/null
+++ b/src/H5FAhdr.c
@@ -0,0 +1,454 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*-------------------------------------------------------------------------
+ *
+ * Created:		H5FAhdr.c
+ *
+ * Purpose:		Array header routines for Fixed Array.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+/**********************/
+/* Module Declaration */
+/**********************/
+
+#define H5FA_MODULE
+
+
+/***********************/
+/* Other Packages Used */
+/***********************/
+
+
+/***********/
+/* Headers */
+/***********/
+#include "H5private.h"		/* Generic Functions			*/
+#include "H5Eprivate.h"		/* Error handling		  	*/
+#include "H5FApkg.h"		/* Fixed Arrays			*/
+#include "H5MFprivate.h"	/* File memory management		*/
+
+
+/****************/
+/* Local Macros */
+/****************/
+
+
+/******************/
+/* Local Typedefs */
+/******************/
+
+
+/********************/
+/* Package Typedefs */
+/********************/
+
+
+/********************/
+/* Local Prototypes */
+/********************/
+
+
+/*********************/
+/* Package Variables */
+/*********************/
+
+
+/*****************************/
+/* Library Private Variables */
+/*****************************/
+
+
+/*******************/
+/* Local Variables */
+/*******************/
+
+/* Declare a free list to manage the H5FA_hdr_t struct */
+H5FL_DEFINE_STATIC(H5FA_hdr_t);
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__hdr_alloc
+ *
+ * Purpose:	Allocate shared Fixed Array header
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PKG, ERR,
+H5FA_hdr_t *, NULL, NULL,
+H5FA__hdr_alloc(H5F_t *f, const H5FA_class_t *cls, void *udata))
+
+    /* Local variables */
+    H5FA_hdr_t *hdr = NULL;          /* Shared Fixed Array header */
+
+    /* Check arguments */
+    HDassert(f);
+    HDassert(cls);
+
+    /* Allocate space for the shared information */
+    if(NULL == (hdr = H5FL_CALLOC(H5FA_hdr_t)))
+	H5E_THROW(H5E_CANTALLOC, "memory allocation failed for Fixed Array shared header")
+
+    /* Set non-zero internal fields */
+    hdr->addr = HADDR_UNDEF;
+
+    /* Set the internal parameters for the array */
+    hdr->f = f;
+    hdr->sizeof_addr = H5F_SIZEOF_ADDR(f);
+    hdr->sizeof_size = H5F_SIZEOF_SIZE(f);
+
+    /* Set the class of the array */
+    hdr->cparam.cls = cls;
+
+    /* Create the callback context */
+    if(NULL == (hdr->cb_ctx = (*cls->crt_context)(udata)))
+	H5E_THROW(H5E_CANTCREATE, "unable to create fixed array client callback context")
+
+    /* Set the return value */
+    ret_value = hdr;
+
+CATCH
+    if(!ret_value)
+        if(hdr && H5FA__hdr_dest(hdr) < 0)
+            H5E_THROW(H5E_CANTFREE, "unable to destroy fixed array header")
+
+END_FUNC(PKG)   /* end H5FA__hdr_alloc() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__hdr_create
+ *
+ * Purpose:	Creates a new Fixed Array header in the file
+ *
+ * Return:	SUCCEED/FAIL
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PKG, ERR,
+haddr_t, HADDR_UNDEF, HADDR_UNDEF,
+H5FA__hdr_create(H5F_t *f, hid_t dxpl_id, const H5FA_create_t *cparam,
+    void *ctx_udata))
+
+    /* Local variables */
+    H5FA_hdr_t *hdr = NULL;     /* Fixed array header */
+
+#ifdef H5FA_DEBUG
+HDfprintf(stderr, "%s: Called\n", FUNC);
+#endif /* H5FA_DEBUG */
+
+    /* Check arguments */
+    HDassert(f);
+    HDassert(cparam);
+
+#ifndef NDEBUG
+{
+    /* Check for valid parameters */
+    if(cparam->raw_elmt_size == 0)
+	H5E_THROW(H5E_BADVALUE, "element size must be greater than zero")
+}
+#endif /* NDEBUG */
+
+    /* Allocate space for the shared information */
+    if(NULL == (hdr = H5FA__hdr_alloc(f, cparam->cls, ctx_udata)))
+	H5E_THROW(H5E_CANTALLOC, "memory allocation failed for Fixed Array shared header")
+
+    hdr->dblk_addr = HADDR_UNDEF;
+
+    /* Set the creation parameters for the array */
+    HDmemcpy(&hdr->cparam, cparam, sizeof(hdr->cparam));
+
+    /* Set size of header on disk (locally and in statistics) */
+    hdr->stats.hdr_size = hdr->size = H5FA_HEADER_SIZE(hdr);
+
+    /* Set number of elements for Fixed Array in statistics */
+    hdr->stats.nelmts = hdr->cparam.nelmts;
+
+    /* Allocate space for the header on disk */
+    if(HADDR_UNDEF == (hdr->addr = H5MF_alloc(f, H5FD_MEM_FARRAY_HDR, dxpl_id, (hsize_t)hdr->size)))
+	H5E_THROW(H5E_CANTALLOC, "file allocation failed for Fixed Array header")
+
+    /* Cache the new Fixed Array header */
+    if(H5AC_set(f, dxpl_id, H5AC_FARRAY_HDR, hdr->addr, hdr, H5AC__NO_FLAGS_SET) < 0)
+	H5E_THROW(H5E_CANTINSERT, "can't add fixed array header to cache")
+
+    /* Set address of array header to return */
+    ret_value = hdr->addr;
+
+CATCH
+    if(!H5F_addr_defined(ret_value))
+        if(hdr) {
+            /* Release header's disk space */
+            if(H5F_addr_defined(hdr->addr) && H5MF_xfree(f, H5FD_MEM_FARRAY_HDR, dxpl_id, hdr->addr, (hsize_t)hdr->size) < 0)
+                H5E_THROW(H5E_CANTFREE, "unable to free Fixed Array header")
+
+            /* Destroy header */
+            if(H5FA__hdr_dest(hdr) < 0)
+                H5E_THROW(H5E_CANTFREE, "unable to destroy Fixed Array header")
+        } /* end if */
+
+END_FUNC(PKG)   /* end H5FA__hdr_create() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__hdr_incr
+ *
+ * Purpose:	Increment component reference count on shared array header
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PKG, ERR,
+herr_t, SUCCEED, FAIL,
+H5FA__hdr_incr(H5FA_hdr_t *hdr))
+
+    /* Sanity check */
+    HDassert(hdr);
+
+    /* Mark header as un-evictable when something is depending on it */
+    if(hdr->rc == 0)
+        if(H5AC_pin_protected_entry(hdr->f, hdr) < 0)
+            H5E_THROW(H5E_CANTPIN, "unable to pin fixed array header")
+
+    /* Increment reference count on shared header */
+    hdr->rc++;
+
+CATCH
+
+END_FUNC(PKG)   /* end H5FA__hdr_incr() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__hdr_decr
+ *
+ * Purpose:	Decrement component reference count on shared array header
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PKG, ERR,
+herr_t, SUCCEED, FAIL,
+H5FA__hdr_decr(H5FA_hdr_t *hdr))
+
+    /* Sanity check */
+    HDassert(hdr);
+    HDassert(hdr->rc);
+
+    /* Decrement reference count on shared header */
+    hdr->rc--;
+
+    /* Mark header as evictable again when nothing depend on it */
+    if(hdr->rc == 0) {
+        HDassert(hdr->file_rc == 0);
+        if(H5AC_unpin_entry(hdr->f, hdr) < 0)
+            H5E_THROW(H5E_CANTUNPIN, "unable to unpin fixed array header")
+    } /* end if */
+
+CATCH
+
+END_FUNC(PKG)   /* end H5FA__hdr_decr() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__hdr_fuse_incr
+ *
+ * Purpose:	Increment file reference count on shared array header
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PKG, NOERR,
+herr_t, SUCCEED, -,
+H5FA__hdr_fuse_incr(H5FA_hdr_t *hdr))
+
+    /* Sanity check */
+    HDassert(hdr);
+
+    /* Increment file reference count on shared header */
+    hdr->file_rc++;
+
+END_FUNC(PKG)   /* end H5FA__hdr_fuse_incr() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__hdr_fuse_decr
+ *
+ * Purpose:	Decrement file reference count on shared array header
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PKG, NOERR,
+size_t, 0, -,
+H5FA__hdr_fuse_decr(H5FA_hdr_t *hdr))
+
+    /* Sanity check */
+    HDassert(hdr);
+    HDassert(hdr->file_rc);
+
+    /* Decrement file reference count on shared header */
+    hdr->file_rc--;
+
+    /* Set return value */
+    ret_value = hdr->file_rc;
+
+END_FUNC(PKG)   /* end H5FA__hdr_fuse_decr() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__hdr_modified
+ *
+ * Purpose:	Mark a fixed array as modified
+ *
+ * Return:	SUCCEED/FAIL
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PKG, ERR,
+herr_t, SUCCEED, FAIL,
+H5FA__hdr_modified(H5FA_hdr_t *hdr))
+
+    /* Sanity check */
+    HDassert(hdr);
+    HDassert(hdr->f);
+
+    /* Mark header as dirty in cache */
+    if(H5AC_mark_pinned_or_protected_entry_dirty(hdr->f, hdr) < 0)
+        H5E_THROW(H5E_CANTMARKDIRTY, "unable to mark fixed array header as dirty")
+
+CATCH
+
+END_FUNC(PKG)   /* end H5FA__hdr_modified() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__hdr_delete
+ *
+ * Purpose:	Delete a fixed array, starting with the header
+ *
+ * Return:	SUCCEED/FAIL
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PKG, ERR,
+herr_t, SUCCEED, FAIL,
+H5FA__hdr_delete(H5FA_hdr_t *hdr, hid_t dxpl_id))
+
+    /* Sanity check */
+    HDassert(hdr);
+    HDassert(!hdr->file_rc);
+
+#ifndef NDEBUG
+{
+    unsigned hdr_status = 0;         /* Array header's status in the metadata cache */
+
+    /* Check the array header's status in the metadata cache */
+    if(H5AC_get_entry_status(hdr->f, hdr->addr, &hdr_status) < 0)
+        H5E_THROW(H5E_CANTGET, "unable to check metadata cache status for array header")
+
+    /* Sanity checks on array header */
+    HDassert(hdr_status & H5AC_ES__IN_CACHE);
+    HDassert(hdr_status & H5AC_ES__IS_PROTECTED);
+} /* end block */
+#endif /* NDEBUG */
+
+    /* Check for Fixed Array Data block */
+    if(H5F_addr_defined(hdr->dblk_addr)) {
+#ifdef H5FA_DEBUG
+HDfprintf(stderr, "%s: hdr->dblk_addr = %a\n", FUNC, hdr->dblk_addr);
+#endif /* H5FA_DEBUG */
+
+        /* Delete Fixed Array Data block */
+        if(H5FA__dblock_delete(hdr, dxpl_id, hdr->dblk_addr, hdr->cparam.nelmts) < 0)
+            H5E_THROW(H5E_CANTDELETE, "unable to delete fixed array data block")
+    } /* end if */
+
+    /* Finished deleting header */
+    if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_FARRAY_HDR, hdr->addr, hdr, H5AC__DIRTIED_FLAG | H5AC__DELETED_FLAG | H5AC__FREE_FILE_SPACE_FLAG) < 0)
+        H5E_THROW(H5E_CANTUNPROTECT, "unable to release fixed array header")
+    hdr = NULL;
+
+CATCH
+
+    /* Unprotect the header, if an error occurred */
+    if(hdr && H5AC_unprotect(hdr->f, dxpl_id, H5AC_FARRAY_HDR, hdr->addr, hdr, H5AC__NO_FLAGS_SET) < 0)
+        H5E_THROW(H5E_CANTUNPROTECT, "unable to release fixed array header")
+
+END_FUNC(PKG)   /* end H5FA__hdr_delete() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__hdr_dest
+ *
+ * Purpose:	Destroys a fixed array header in memory.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PKG, ERR,
+herr_t, SUCCEED, FAIL,
+H5FA__hdr_dest(H5FA_hdr_t *hdr))
+
+    /* Check arguments */
+    HDassert(hdr);
+    HDassert(hdr->rc == 0);
+
+    /* Destroy the callback context */
+    if((*hdr->cparam.cls->dst_context)(hdr->cb_ctx) < 0)
+	H5E_THROW(H5E_CANTRELEASE, "unable to destroy fixed array client callback context")
+    hdr->cb_ctx = NULL;
+    
+    /* Free the shared info itself */
+    hdr = H5FL_FREE(H5FA_hdr_t, hdr);
+
+CATCH
+
+END_FUNC(PKG)   /* end H5FA__hdr_dest() */
+
diff --git a/src/H5FApkg.h b/src/H5FApkg.h
new file mode 100644
index 0000000..16d2518
--- /dev/null
+++ b/src/H5FApkg.h
@@ -0,0 +1,286 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ * Programmer:	
+ *
+ * Purpose:	This file contains declarations which are visible only within
+ *		the H5FA package.  Source files outside the H5FA package should
+ *		include H5FAprivate.h instead.
+ */
+#if !(defined(H5FA_PACKAGE) | defined(H5FA_MODULE))
+#error "Do not include this file outside the H5FA package!"
+#endif
+
+#ifndef _H5FApkg_H
+#define _H5FApkg_H
+
+/* Get package's private header */
+#include "H5FAprivate.h"
+
+/* Other private headers needed by this file */
+#include "H5ACprivate.h"	/* Metadata cache			*/
+#include "H5FLprivate.h"	/* Free Lists                           */
+
+
+/**************************/
+/* Package Private Macros */
+/**************************/
+
+/* Define this to display debugging information for the Fixed Array layer */
+/* #define H5FA_DEBUG */
+
+
+/* If this package header is being included in one of the H5FA modules, define
+ *      the proper control macros for the generic FUNC_ENTER/LEAVE and error
+ *      reporting macros.
+ */
+#ifdef H5FA_MODULE
+#define H5_MY_PKG       H5FA
+#define H5_MY_PKG_ERR   H5E_FARRAY
+#define H5_MY_PKG_INIT  NO
+#endif /* H5FA_MODULE */
+
+/* Fill value for fixed array test class */
+#ifdef H5FA_TESTING
+#define H5FA_TEST_FILL          ((uint64_t)ULLONG_MAX)
+#endif /* H5FA_TESTING */
+
+/* Size of checksum information (on disk) */
+#define H5FA_SIZEOF_CHKSUM      4
+
+/* "Standard" size of prefix information for fixed array metadata */
+#define H5FA_METADATA_PREFIX_SIZE(c) (                                        \
+    H5_SIZEOF_MAGIC   /* Signature */                                         \
+    + 1 /* Version */                                                         \
+    + ((c) ? H5FA_SIZEOF_CHKSUM : 0) /* Metadata checksum */                  \
+    )
+
+/* Size of the Fixed Array header on disk */
+#define H5FA_HEADER_SIZE(h)     (                                             \
+    /* General metadata fields */                                             \
+    H5FA_METADATA_PREFIX_SIZE(TRUE)                                           \
+                                                                              \
+    /* General array information */                                           \
+    + 1 /* Array type */                                                      \
+    + 1 /* Element Size */                                                    \
+    + 1 /* Log2(Max. # of elements in data block page) - i.e. # of bits needed to store max. # of elements in data block page */ \
+                                                                              \
+    /* Fixed Array statistics fields */                                       \
+    + (h)->sizeof_size /* # of elements in the fixed array */    	      \
+                                                                              \
+    /* Fixed Array Header specific fields */                                  \
+    + (h)->sizeof_addr /* File address of Fixed Array data block */  	      \
+    )
+
+/* Size of the Fixed Array data block prefix on disk */
+#define H5FA_DBLOCK_PREFIX_SIZE(d)  (                                         \
+    /* General metadata fields */                                             \
+    H5FA_METADATA_PREFIX_SIZE(TRUE)                                           \
+                                                                              \
+    /* Sanity-checking fields */                                              \
+    + (d)->hdr->sizeof_addr    /* File address of Fixed Array header owning the data block */  \
+    + 1 /* Array type */                                                      \
+                                                                              \
+    /* Fixed Array Data Block specific fields */			      \
+    + (d)->dblk_page_init_size /* Fixed array data block 'page init' bitmasks (can be 0 if no pages) */ \
+    )
+
+/* Size of the Fixed Array data block on disk */
+#define H5FA_DBLOCK_SIZE(d)  (					      	      \
+    /* Data block prefix size  */                                             \
+    H5FA_DBLOCK_PREFIX_SIZE(d)                                                \
+                                                                              \
+    /* Fixed Array Elements|Pages of Elements*/				      \
+    + ((d)->hdr->cparam.nelmts * (size_t)(d)->hdr->cparam.raw_elmt_size)      \
+    + ((d)->npages * H5FA_SIZEOF_CHKSUM)        /* Checksum */  	      \
+    )
+
+/* Size of the Fixed Array data block page on disk */
+#define H5FA_DBLK_PAGE_SIZE(d, nelmts)     (                                          	   \
+    /* Fixed Array Data Block Page */					      \
+    + (nelmts * (size_t)(d)->hdr->cparam.raw_elmt_size) /* Elements in data block page */  \
+    + H5FA_SIZEOF_CHKSUM                        	/* Checksum for each page */  	   \
+    )
+
+/****************************/
+/* Package Private Typedefs */
+/****************************/
+
+/* The Fixed Array header information */
+typedef struct H5FA_hdr_t {
+    /* Information for H5AC cache functions, _must_ be first field in structure */
+    H5AC_info_t cache_info;
+
+    /* Fixed array configuration/creation parameters (stored in header) */
+    H5FA_create_t cparam;               /* Creation parameters for Fixed Array */
+
+    /* Fixed Array data block information (stored in header) */
+    haddr_t dblk_addr;               	/* Address of Fixed Array Data block */
+
+    /* Statistics for Fixed Array (stored in header) */
+    H5FA_stat_t stats;                  /* Statistcs for Fixed Array */
+
+    /* Computed/cached values (not stored in header) */
+    size_t rc;                          /* Reference count of the header */
+    haddr_t addr;                       /* Address of header in file */
+    size_t size;                        /* Size of header in file */
+    H5F_t *f;                           /* Pointer to file for fixed array */
+    size_t file_rc;                     /* Reference count of files using array header */
+    hbool_t pending_delete;             /* Array is pending deletion */
+    size_t sizeof_addr;                 /* Size of file addresses */
+    size_t sizeof_size;                 /* Size of file sizes */
+
+    /* Client information (not stored) */
+    void *cb_ctx;                       /* Callback context */
+} H5FA_hdr_t;
+
+/* The fixed array data block information */
+typedef struct H5FA_dblock_t {
+    /* Information for H5AC cache functions, _must_ be first field in structure */
+    H5AC_info_t cache_info;
+
+    /* Fixed array information (stored) */
+    uint8_t     *dblk_page_init;/* Bitmap of whether a data block page is initialized */
+    void        *elmts;         /* Buffer for elements stored in data block  */
+
+    /* Internal array information (not stored) */
+    H5FA_hdr_t	*hdr;	        /* Shared array header info	              */
+
+    /* Computed/cached values (not stored) */
+    haddr_t     addr;           /* Address of this data block on disk	      */
+    hsize_t     size;           /* Size of data block on disk		      */
+    size_t      npages;         /* Nummber of pages in data block (zero if not paged) */
+    size_t      last_page_nelmts;  /* Nummber of elements in last page, if paged */
+
+    /* Fixed Array data block information (not stored) */
+    size_t dblk_page_nelmts;         	/* # of elements per data block page */
+    size_t dblk_page_size; 		/* Size of a data block page */
+    size_t dblk_page_init_size;    	/* Size of 'page init' bitmask */
+} H5FA_dblock_t;
+
+/* The fixed array data block page information */
+typedef struct H5FA_dbk_page_t {
+    /* Information for H5AC cache functions, _must_ be first field in structure */
+    H5AC_info_t cache_info;
+
+    /* Fixed array information (stored) */
+    void        *elmts;         /* Buffer for elements stored in data block page */
+
+    /* Internal array information (not stored) */
+    H5FA_hdr_t	*hdr;	        /* Shared array header info	              */
+
+    /* Computed/cached values (not stored) */
+    haddr_t     addr;           /* Address of this data block page on disk    */
+    size_t      size;           /* Size of data block page on disk	      */
+    size_t      nelmts;         /* Number of elements in data block page      */
+} H5FA_dblk_page_t;
+
+/* Fixed array */
+struct H5FA_t {
+    H5FA_hdr_t  *hdr;           /* Pointer to internal fixed array header info 	*/
+    H5F_t      *f;              /* Pointer to file for fixed array 		*/
+};
+
+
+/* Metadata cache callback user data types */
+
+/* Info needed for loading data block page */
+typedef struct H5FA_dblk_page_load_ud_t {
+    size_t nelmts;              /* Number of elements in data block page */
+} H5FA_dblk_page_load_ud_t;
+
+
+
+/*****************************/
+/* Package Private Variables */
+/*****************************/
+
+/* H5FA header inherits cache-like properties from H5AC */
+H5_DLLVAR const H5AC_class_t H5AC_FARRAY_HDR[1];
+
+/* H5FA data block inherits cache-like properties from H5AC */
+H5_DLLVAR const H5AC_class_t H5AC_FARRAY_DBLOCK[1];
+
+/* H5FA data block page inherits cache-like properties from H5AC */
+H5_DLLVAR const H5AC_class_t H5AC_FARRAY_DBLK_PAGE[1];
+
+
+/* The Fixed Array class for dataset chunks w/o filters*/
+H5_DLLVAR const H5FA_class_t H5FA_CLS_CHUNK[1];
+
+/* The Fixed Array class for dataset chunks w/ filters*/
+H5_DLLVAR const H5FA_class_t H5FA_CLS_FILT_CHUNK[1];
+
+/* Internal fixed array testing class */
+#ifdef H5FA_TESTING
+H5_DLLVAR const H5FA_class_t H5FA_CLS_TEST[1];
+#endif /* H5FA_TESTING */
+
+
+/******************************/
+/* Package Private Prototypes */
+/******************************/
+
+/* Header routines */
+H5_DLL H5FA_hdr_t *H5FA__hdr_alloc(H5F_t *f, const H5FA_class_t *cls, void *ctx_udata);
+H5_DLL haddr_t H5FA__hdr_create(H5F_t *f, hid_t dxpl_id, const H5FA_create_t *cparam, void *ctx_udata);
+H5_DLL void *H5FA__hdr_alloc_elmts(H5FA_hdr_t *hdr, size_t nelmts);
+H5_DLL herr_t H5FA__hdr_free_elmts(H5FA_hdr_t *hdr, size_t nelmts, void *elmts);
+H5_DLL herr_t H5FA__hdr_incr(H5FA_hdr_t *hdr);
+H5_DLL herr_t H5FA__hdr_decr(H5FA_hdr_t *hdr);
+H5_DLL herr_t H5FA__hdr_fuse_incr(H5FA_hdr_t *hdr);
+H5_DLL size_t H5FA__hdr_fuse_decr(H5FA_hdr_t *hdr);
+H5_DLL herr_t H5FA__hdr_modified(H5FA_hdr_t *hdr);
+H5_DLL herr_t H5FA__hdr_delete(H5FA_hdr_t *hdr, hid_t dxpl_id);
+H5_DLL herr_t H5FA__hdr_dest(H5FA_hdr_t *hdr);
+
+/* Data block routines */
+H5_DLL H5FA_dblock_t *H5FA__dblock_alloc(H5FA_hdr_t *hdr, hsize_t nelmts);
+H5_DLL haddr_t H5FA__dblock_create(H5FA_hdr_t *hdr, hid_t dxpl_id, hbool_t *hdr_dirty, hsize_t nelmts);
+H5_DLL unsigned H5FA__dblock_sblk_idx(const H5FA_hdr_t *hdr, hsize_t idx);
+H5_DLL H5FA_dblock_t *H5FA__dblock_protect(H5FA_hdr_t *hdr, hid_t dxpl_id,
+    haddr_t dblk_addr, hsize_t dblk_nelmts, H5AC_protect_t rw);
+H5_DLL herr_t H5FA__dblock_unprotect(H5FA_dblock_t *dblock, hid_t dxpl_id,
+    unsigned cache_flags);
+H5_DLL herr_t H5FA__dblock_delete(H5FA_hdr_t *hdr, hid_t dxpl_id,
+    haddr_t dblk_addr, hsize_t dblk_nelmts);
+H5_DLL herr_t H5FA__dblock_dest(H5F_t *f, H5FA_dblock_t *dblock);
+
+/* Data block page routines */
+H5_DLL herr_t H5FA__dblk_page_create(H5FA_hdr_t *hdr, hid_t dxpl_id,
+    haddr_t addr, size_t nelmts);
+H5_DLL H5FA_dblk_page_t *H5FA__dblk_page_alloc(H5FA_hdr_t *hdr, size_t nelmts);
+H5_DLL H5FA_dblk_page_t *H5FA__dblk_page_protect(H5FA_hdr_t *hdr, hid_t dxpl_id,
+    haddr_t dblk_page_addr, size_t dblk_page_nelmts, H5AC_protect_t rw);
+H5_DLL herr_t H5FA__dblk_page_unprotect(H5FA_dblk_page_t *dblk_page,
+    hid_t dxpl_id, unsigned cache_flags);
+H5_DLL herr_t H5FA__dblk_page_dest(H5FA_dblk_page_t *dblk_page);
+
+/* Debugging routines for dumping file structures */
+H5_DLL herr_t H5FA__hdr_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr,
+    FILE *stream, int indent, int fwidth, const H5FA_class_t *cls, haddr_t obj_addr);
+H5_DLL herr_t H5FA__dblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr,
+    FILE *stream, int indent, int fwidth, const H5FA_class_t *cls,
+    haddr_t hdr_addr, haddr_t obj_addr);
+
+/* Testing routines */
+#ifdef H5FA_TESTING
+H5_DLL herr_t H5FA_get_cparam_test(const H5FA_t *ea, H5FA_create_t *cparam);
+H5_DLL int H5FA_cmp_cparam_test(const H5FA_create_t *cparam1, const H5FA_create_t *cparam2);
+#endif /* H5FA_TESTING */
+
+#endif /* _H5FApkg_H */
+
diff --git a/src/H5FAprivate.h b/src/H5FAprivate.h
new file mode 100644
index 0000000..2450218
--- /dev/null
+++ b/src/H5FAprivate.h
@@ -0,0 +1,132 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*-------------------------------------------------------------------------
+ *
+ * Created:		H5FAprivate.h
+ *
+ * Purpose:		Private header for library accessible Fixed
+ *                      Array routines.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#ifndef _H5FAprivate_H
+#define _H5FAprivate_H
+
+/* Include package's public header */
+#ifdef NOT_YET
+#include "H5FApublic.h"
+#endif /* NOT_YET */
+
+/* Private headers needed by this file */
+#include "H5Fprivate.h"		/* File access				*/
+
+
+/**************************/
+/* Library Private Macros */
+/**************************/
+
+
+/****************************/
+/* Library Private Typedefs */
+/****************************/
+
+/* Fixed Array class IDs */
+typedef enum H5FA_cls_id_t {
+    H5FA_CLS_CHUNK_ID = 0,      /* Fixed array is for indexing dataset chunks w/o filters */
+    H5FA_CLS_FILT_CHUNK_ID,     /* Fixed array is for indexing dataset chunks w/filters */
+
+    /* (keep these last) */
+    H5FA_CLS_TEST_ID,	        /* Fixed array is for testing (do not use for actual data) */
+    H5FA_NUM_CLS_ID             /* Number of Fixed Array class IDs (must be last) */
+} H5FA_cls_id_t;
+
+/*
+ * Each type of element that can be stored in a Fixed Array has a
+ * variable of this type that contains class variables and methods.
+ */
+typedef struct H5FA_class_t {
+    H5FA_cls_id_t id;           /* ID of Fixed Array class, as found in file */
+    const char *name;           /* Name of class (for debugging) */
+    size_t nat_elmt_size;       /* Size of native (memory) element */
+
+    /* Fixed array client callback methods */
+    void *(*crt_context)(void *udata);          /* Create context for other callbacks */
+    herr_t (*dst_context)(void *ctx);           /* Destroy context */
+    herr_t (*fill)(void *nat_blk, size_t nelmts);    /* Fill array of elements with encoded form of "missing element" value */
+    herr_t (*encode)(void *raw, const void *elmt, size_t nelmts, void *ctx);   /* Encode elements from native form to disk storage form */
+    herr_t (*decode)(const void *raw, void *elmt, size_t nelmts, void *ctx);   /* Decode elements from disk storage form to native form */
+    herr_t (*debug)(FILE *stream, int indent, int fwidth, hsize_t idx, const void *elmt); /* Print an element for debugging */
+} H5FA_class_t;
+
+/* Fixed array creation parameters */
+typedef struct H5FA_create_t {
+    const H5FA_class_t *cls;            /* Class of Fixed Array to create */
+    uint8_t raw_elmt_size;              /* Element size in file (in bytes) */
+    uint8_t max_dblk_page_nelmts_bits;  /* Log2(Max. # of elements in a data block page) - 
+					   i.e. # of bits needed to store max. # of elements 
+					   in a data block page */
+    hsize_t nelmts; 			/* # of elements in array */
+} H5FA_create_t;
+
+/* Fixed array metadata statistics info */
+typedef struct H5FA_stat_t {
+    /* Non-stored (i.e. computed) fields */
+    hsize_t hdr_size;           /* Size of header */
+    hsize_t dblk_size;          /* Size of data block */
+
+    /* Stored fields */
+    hsize_t nelmts;             /* # of elements */
+} H5FA_stat_t;
+
+/* Fixed Array info (forward decl - defined in H5FApkg.h) */
+typedef struct H5FA_t H5FA_t;
+
+/* Define the operator callback function pointer for H5FA_iterate() */
+typedef int (*H5FA_operator_t)(hsize_t idx, const void *_elmt, void *_udata);
+
+
+/*****************************/
+/* Library-private Variables */
+/*****************************/
+
+
+/***************************************/
+/* Library-private Function Prototypes */
+/***************************************/
+
+/* General routines */
+H5_DLL H5FA_t *H5FA_create(H5F_t *f, hid_t dxpl_id, const H5FA_create_t *cparam,
+    void *ctx_udata);
+H5_DLL H5FA_t *H5FA_open(H5F_t *f, hid_t dxpl_id, haddr_t ea_addr, const H5FA_class_t *cls, 
+    void *ctx_udata);
+H5_DLL herr_t H5FA_get_nelmts(const H5FA_t *ea, hsize_t *nelmts);
+H5_DLL herr_t H5FA_get_addr(const H5FA_t *ea, haddr_t *addr);
+H5_DLL herr_t H5FA_set(const H5FA_t *ea, hid_t dxpl_id, hsize_t idx, const void *elmt);
+H5_DLL herr_t H5FA_get(const H5FA_t *ea, hid_t dxpl_id, hsize_t idx, void *elmt);
+H5_DLL herr_t H5FA_close(H5FA_t *ea, hid_t dxpl_id);
+H5_DLL herr_t H5FA_delete(H5F_t *f, hid_t dxpl_id, haddr_t ea_addr);
+H5_DLL herr_t H5FA_iterate(H5FA_t *fa, hid_t dxpl_id, H5FA_operator_t op, void *udata);
+
+/* Statistics routines */
+H5_DLL herr_t H5FA_get_stats(const H5FA_t *ea, H5FA_stat_t *stats);
+
+/* Debugging routines */
+#ifdef H5FA_DEBUGGING
+#endif /* H5FA_DEBUGGING */
+
+#endif /* _H5FAprivate_H */
+
diff --git a/src/H5FAstat.c b/src/H5FAstat.c
new file mode 100644
index 0000000..bed6c6e
--- /dev/null
+++ b/src/H5FAstat.c
@@ -0,0 +1,113 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*-------------------------------------------------------------------------
+ *
+ * Created:		H5FAstat.c
+ *
+ * Purpose:	        Fixed array metadata statistics functions.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+/**********************/
+/* Module Declaration */
+/**********************/
+
+#define H5FA_MODULE
+
+
+/***********************/
+/* Other Packages Used */
+/***********************/
+
+
+/***********/
+/* Headers */
+/***********/
+#include "H5private.h"		/* Generic Functions			*/
+#include "H5Eprivate.h"		/* Error handling		  	*/
+#include "H5FApkg.h"		/* Fixed Arrays				*/
+
+
+/****************/
+/* Local Macros */
+/****************/
+
+
+/******************/
+/* Local Typedefs */
+/******************/
+
+
+/********************/
+/* Package Typedefs */
+/********************/
+
+
+/********************/
+/* Local Prototypes */
+/********************/
+
+
+/*********************/
+/* Package Variables */
+/*********************/
+
+
+/*****************************/
+/* Library Private Variables */
+/*****************************/
+
+
+/*******************/
+/* Local Variables */
+/*******************/
+
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA_get_stats
+ *
+ * Purpose:	Query the metadata stats of an array
+ *
+ * Return:	SUCCEED/FAIL
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PRIV, NOERR,
+herr_t, SUCCEED, -,
+H5FA_get_stats(const H5FA_t *fa, H5FA_stat_t *stats))
+
+    /* Local variables */
+
+#ifdef H5FA_DEBUG
+HDfprintf(stderr, "%s: Called\n", FUNC);
+#endif /* H5FA_DEBUG */
+
+    /*
+     * Check arguments.
+     */
+    HDassert(fa);
+    HDassert(stats);
+
+    /* Copy fixed array statistics */
+    HDmemcpy(stats, &fa->hdr->stats, sizeof(fa->hdr->stats));
+
+END_FUNC(PRIV)  /* end H5FA_get_stats() */
+
diff --git a/src/H5FAtest.c b/src/H5FAtest.c
new file mode 100644
index 0000000..c76c80b
--- /dev/null
+++ b/src/H5FAtest.c
@@ -0,0 +1,391 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/* 
+ * Programmer:  
+ *
+ * Purpose:	Fixed array testing functions.
+ *
+ */
+
+/**********************/
+/* Module Declaration */
+/**********************/
+
+#define H5FA_MODULE
+#define H5FA_TESTING
+
+
+/***********************/
+/* Other Packages Used */
+/***********************/
+
+
+/***********/
+/* Headers */
+/***********/
+#include "H5private.h"		/* Generic Functions			*/
+#include "H5Eprivate.h"		/* Error handling		  	*/
+#include "H5FApkg.h"		/* Fixed Arrays				*/
+#include "H5FLprivate.h"	/* Free Lists                           */
+#include "H5Vprivate.h"         /* Vector functions			*/
+
+
+/****************/
+/* Local Macros */
+/****************/
+
+/* Sanity checking value for callback contexts */
+#define H5FA__TEST_BOGUS_VAL    42
+
+
+/******************/
+/* Local Typedefs */
+/******************/
+
+/* Callback context */
+typedef struct H5FA__test_ctx_t {
+    uint32_t    bogus;          /* Placeholder field to verify that context is working */
+} H5FA__test_ctx_t;
+
+
+/********************/
+/* Package Typedefs */
+/********************/
+
+
+/********************/
+/* Local Prototypes */
+/********************/
+
+/* Fixed array class callbacks */
+static void *H5FA__test_crt_context(void *udata);
+static herr_t H5FA__test_dst_context(void *ctx);
+static herr_t H5FA__test_fill(void *nat_blk, size_t nelmts);
+static herr_t H5FA__test_encode(void *raw, const void *elmt, size_t nelmts,
+    void *ctx);
+static herr_t H5FA__test_decode(const void *raw, void *elmt, size_t nelmts,
+    void *ctx);
+static herr_t H5FA__test_debug(FILE *stream, int indent, int fwidth,
+    hsize_t idx, const void *elmt);
+
+
+/*********************/
+/* Package Variables */
+/*********************/
+
+/* Fixed array testing class information */
+const H5FA_class_t H5FA_CLS_TEST[1]={{
+    H5FA_CLS_TEST_ID,           /* Type of Fixed array */
+    "Testing",                  /* Name of fixed array class */
+    sizeof(uint64_t),           /* Size of native element */
+    H5FA__test_crt_context,     /* Create context */
+    H5FA__test_dst_context,     /* Destroy context */
+    H5FA__test_fill,            /* Fill block of missing elements callback */
+    H5FA__test_encode,          /* Element encoding callback */
+    H5FA__test_decode,          /* Element decoding callback */
+    H5FA__test_debug            /* Element debugging callback */
+}};
+
+
+/*****************************/
+/* Library Private Variables */
+/*****************************/
+
+
+/*******************/
+/* Local Variables */
+/*******************/
+
+/* Declare a free list to manage the H5FA__test_ctx_t struct */
+H5FL_DEFINE_STATIC(H5FA__test_ctx_t);
+
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__test_crt_context
+ *
+ * Purpose:	Create context for callbacks
+ *
+ * Return:	Success:	non-NULL
+ *		Failure:	NULL
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(STATIC, ERR,
+void *, NULL, NULL,
+H5FA__test_crt_context(void UNUSED *udata))
+
+    /* Local variables */
+    H5FA__test_ctx_t *ctx;              /* Context for callbacks */
+
+    /* Sanity checks */
+    HDassert(udata);
+
+    /* Allocate new context structure */
+    if(NULL == (ctx = H5FL_MALLOC(H5FA__test_ctx_t)))
+	H5E_THROW(H5E_CANTALLOC, "can't allocate fixed array client callback context")
+
+    /* Initialize the context */
+    ctx->bogus = H5FA__TEST_BOGUS_VAL;
+
+    /* Set return value */
+    ret_value = ctx;
+
+CATCH
+
+END_FUNC(STATIC)  /* end H5FA__test_crt_context() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__test_dst_context
+ *
+ * Purpose:	Destroy context for callbacks
+ *
+ * Return:	Success:	non-negative
+ *		Failure:	negative
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(STATIC, NOERR,
+herr_t, SUCCEED, -,
+H5FA__test_dst_context(void *_ctx))
+
+    /* Local variables */
+    H5FA__test_ctx_t *ctx = (H5FA__test_ctx_t *)_ctx;   /* Callback context to destroy */
+
+    /* Sanity checks */
+    HDassert(H5FA__TEST_BOGUS_VAL == ctx->bogus);
+
+    /* Release context structure */
+    ctx = H5FL_FREE(H5FA__test_ctx_t, ctx);
+
+END_FUNC(STATIC)  /* end H5FA__test_dst_context() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__test_fill
+ *
+ * Purpose:	Fill "missing elements" in block of elements
+ *
+ * Return:	Success:	non-negative
+ *		Failure:	negative
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(STATIC, NOERR,
+herr_t, SUCCEED, -,
+H5FA__test_fill(void *nat_blk, size_t nelmts))
+
+    /* Local variables */
+    uint64_t fill_val = H5FA_TEST_FILL;          /* Value to fill elements with */
+
+    /* Sanity checks */
+    HDassert(nat_blk);
+    HDassert(nelmts);
+
+    H5V_array_fill(nat_blk, &fill_val, sizeof(uint64_t), nelmts);
+
+END_FUNC(STATIC)  /* end H5FA__test_fill() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__test_encode
+ *
+ * Purpose:	Encode an element from "native" to "raw" form
+ *
+ * Return:	Success:	non-negative
+ *		Failure:	negative
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(STATIC, NOERR,
+herr_t, SUCCEED, -,
+H5FA__test_encode(void *raw, const void *_elmt, size_t nelmts, void *_ctx))
+
+    /* Local variables */
+    H5FA__test_ctx_t *ctx = (H5FA__test_ctx_t *)_ctx;   /* Callback context to destroy */
+    const uint64_t *elmt = (const uint64_t *)_elmt;     /* Convenience pointer to native elements */
+
+    /* Sanity checks */
+    HDassert(raw);
+    HDassert(elmt);
+    HDassert(nelmts);
+    HDassert(H5FA__TEST_BOGUS_VAL == ctx->bogus);
+
+    /* Encode native elements into raw elements */
+    while(nelmts) {
+        /* Encode element */
+        /* (advances 'raw' pointer) */
+        UINT64ENCODE(raw, *elmt);
+
+        /* Advance native element pointer */
+        elmt++;
+
+        /* Decrement # of elements to encode */
+        nelmts--;
+    } /* end while */
+
+END_FUNC(STATIC)  /* end H5FA__test_encode() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__test_decode
+ *
+ * Purpose:	Decode an element from "raw" to "native" form
+ *
+ * Return:	Success:	non-negative
+ *		Failure:	negative
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(STATIC, NOERR,
+herr_t, SUCCEED, -,
+H5FA__test_decode(const void *_raw, void *_elmt, size_t nelmts, void *_ctx))
+
+    /* Local variables */
+    H5FA__test_ctx_t *ctx = (H5FA__test_ctx_t *)_ctx;   /* Callback context to destroy */
+    uint64_t *elmt = (uint64_t *)_elmt;     /* Convenience pointer to native elements */
+    const uint8_t *raw = (const uint8_t *)_raw; /* Convenience pointer to raw elements */
+
+    /* Sanity checks */
+    HDassert(raw);
+    HDassert(elmt);
+    HDassert(nelmts);
+    HDassert(H5FA__TEST_BOGUS_VAL == ctx->bogus);
+
+    /* Decode raw elements into native elements */
+    while(nelmts) {
+        /* Decode element */
+        /* (advances 'raw' pointer) */
+        UINT64DECODE(raw, *elmt);
+
+        /* Advance native element pointer */
+        elmt++;
+
+        /* Decrement # of elements to decode */
+        nelmts--;
+    } /* end while */
+
+END_FUNC(STATIC)  /* end H5FA__test_decode() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA__test_debug
+ *
+ * Purpose:	Display an element for debugging
+ *
+ * Return:	Success:	non-negative
+ *		Failure:	negative
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(STATIC, NOERR,
+herr_t, SUCCEED, -,
+H5FA__test_debug(FILE *stream, int indent, int fwidth, hsize_t idx,
+    const void *elmt))
+
+    /* Local variables */
+    char temp_str[128];     /* Temporary string, for formatting */
+
+    /* Sanity checks */
+    HDassert(stream);
+    HDassert(elmt);
+
+    /* Print element */
+    sprintf(temp_str, "Element #%llu:", (unsigned long long)idx);
+    HDfprintf(stream, "%*s%-*s %llu\n", indent, "", fwidth, temp_str,
+        (unsigned long long)*(const uint64_t *)elmt);
+
+END_FUNC(STATIC)  /* end H5FA__test_debug() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA_get_cparam_test
+ *
+ * Purpose:	Retrieve the parameters used to create the fixed array
+ *
+ * Return:	Success:	non-negative
+ *		Failure:	negative
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PRIV, NOERR,
+herr_t, SUCCEED, -,
+H5FA_get_cparam_test(const H5FA_t *fa, H5FA_create_t *cparam))
+
+    /* Check arguments. */
+    HDassert(fa);
+    HDassert(cparam);
+
+    /* Get fixed array creation parameters */
+    cparam->raw_elmt_size = fa->hdr->cparam.raw_elmt_size;
+    cparam->nelmts = fa->hdr->cparam.nelmts;
+
+END_FUNC(PRIV)  /* end H5FA_get_cparam_test() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FA_cmp_cparam_test
+ *
+ * Purpose:	Compare the parameters used to create the fixed array
+ *
+ * Return:	Success:	non-negative
+ *		Failure:	negative
+ *
+ * Programmer:	Vailin Choi
+ *              Thursday, April 30, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+BEGIN_FUNC(PRIV, ERRCATCH,
+int, 0, -,
+H5FA_cmp_cparam_test(const H5FA_create_t *cparam1, const H5FA_create_t *cparam2))
+
+    /* Check arguments. */
+    HDassert(cparam1);
+    HDassert(cparam2);
+
+    /* Compare creation parameters for array */
+    if(cparam1->raw_elmt_size < cparam2->raw_elmt_size)
+        H5_LEAVE(-1)
+    else if(cparam1->raw_elmt_size > cparam2->raw_elmt_size)
+        H5_LEAVE(1)
+
+CATCH
+
+END_FUNC(PRIV)  /* end H5FA_cmp_cparam_test() */
+
diff --git a/src/H5FDpublic.h b/src/H5FDpublic.h
index b1e1482..52d7eb9 100644
--- a/src/H5FDpublic.h
+++ b/src/H5FDpublic.h
@@ -110,6 +110,18 @@ typedef enum H5FD_mem_t {
 #define H5FD_MEM_EARRAY_DBLOCK  H5FD_MEM_LHEAP
 #define H5FD_MEM_EARRAY_DBLK_PAGE  H5FD_MEM_LHEAP
 
+/* Map "fixed array" header blocks to 'ohdr' type file memory, since its
+ * a fair amount of work to add a new kind of file memory and they are similar
+ * enough to object headers and probably too minor to deserve their own type.
+ *
+ * Map "fixed array" data blocks & pages to 'lheap' type file memory, since
+ * they are similar enough to local heap info.
+ *
+ */
+#define H5FD_MEM_FARRAY_HDR     H5FD_MEM_OHDR
+#define H5FD_MEM_FARRAY_DBLOCK  H5FD_MEM_LHEAP
+#define H5FD_MEM_FARRAY_DBLK_PAGE  H5FD_MEM_LHEAP
+
 /*
  * A free-list map which maps all types of allocation requests to a single
  * free list.  This is useful for drivers that don't really care about
diff --git a/src/H5Fprivate.h b/src/H5Fprivate.h
index f29b495..512d1b13 100644
--- a/src/H5Fprivate.h
+++ b/src/H5Fprivate.h
@@ -430,6 +430,10 @@ typedef struct H5F_blk_aggr_t H5F_blk_aggr_t;
 #define H5EA_SBLOCK_MAGIC               "EASB"          /* Super block */
 #define H5EA_DBLOCK_MAGIC               "EADB"          /* Data block */
 
+/* Fixed array signatures */
+#define H5FA_HDR_MAGIC                  "FAHD"          /* Header */
+#define H5FA_DBLOCK_MAGIC               "FADB"          /* Data block */
+
 /* Free space signatures */
 #define H5FS_HDR_MAGIC                  "FSHD"          /* Header */
 #define H5FS_SINFO_MAGIC                "FSSE"          /* Serialized sections */
diff --git a/src/H5err.txt b/src/H5err.txt
index 2c5ca04..67b6448 100644
--- a/src/H5err.txt
+++ b/src/H5err.txt
@@ -75,6 +75,7 @@ MAJOR, H5E_SLIST, Skip Lists
 MAJOR, H5E_FSPACE, Free Space Manager
 MAJOR, H5E_SOHM, Shared Object Header Messages
 MAJOR, H5E_EARRAY, Extensible Array
+MAJOR, H5E_FARRAY, Fixed Array
 MAJOR, H5E_NONE_MAJOR, No error
 
 # Sections (for grouping minor errors)
diff --git a/src/Makefile.am b/src/Makefile.am
index 0cdd5e9..f784662 100755
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -55,6 +55,8 @@ libhdf5_la_SOURCES= H5.c H5checksum.c H5dbg.c H5system.c H5timer.c H5trace.c \
         H5EAiblock.c H5EAint.c H5EAsblock.c H5EAstat.c H5EAtest.c \
         H5F.c H5Faccum.c H5Fdbg.c H5Ffake.c H5Fio.c H5Fmount.c H5Fmpi.c H5Fquery.c \
         H5Fsfile.c H5Fsuper.c H5Ftest.c \
+        H5FA.c H5FAcache.c H5FAdbg.c H5FAdblock.c H5FAdblkpage.c H5FAhdr.c \
+        H5FAstat.c H5FAtest.c \
         H5FD.c H5FDcore.c  \
         H5FDdirect.c H5FDfamily.c H5FDint.c H5FDlog.c H5FDmpi.c H5FDmpio.c \
         H5FDmpiposix.c H5FDmulti.c H5FDsec2.c H5FDspace.c H5FDstdio.c \
diff --git a/src/Makefile.in b/src/Makefile.in
index b66c8f5..fe7a9c4 100644
--- a/src/Makefile.in
+++ b/src/Makefile.in
@@ -90,12 +90,14 @@ am_libhdf5_la_OBJECTS = H5.lo H5checksum.lo H5dbg.lo H5system.lo \
 	H5EAdblock.lo H5EAhdr.lo H5EAiblock.lo H5EAint.lo \
 	H5EAsblock.lo H5EAstat.lo H5EAtest.lo H5F.lo H5Faccum.lo \
 	H5Fdbg.lo H5Ffake.lo H5Fio.lo H5Fmount.lo H5Fmpi.lo \
-	H5Fquery.lo H5Fsfile.lo H5Fsuper.lo H5Ftest.lo H5FD.lo \
-	H5FDcore.lo H5FDdirect.lo H5FDfamily.lo H5FDint.lo H5FDlog.lo \
-	H5FDmpi.lo H5FDmpio.lo H5FDmpiposix.lo H5FDmulti.lo \
-	H5FDsec2.lo H5FDspace.lo H5FDstdio.lo H5FL.lo H5FO.lo H5FS.lo \
-	H5FScache.lo H5FSdbg.lo H5FSsection.lo H5FSstat.lo H5FStest.lo \
-	H5G.lo H5Gbtree2.lo H5Gcache.lo H5Gcompact.lo H5Gdense.lo \
+	H5Fquery.lo H5Fsfile.lo H5Fsuper.lo H5Ftest.lo H5FA.lo \
+	H5FAcache.lo H5FAdbg.lo H5FAdblock.lo H5FAdblkpage.lo \
+	H5FAhdr.lo H5FAstat.lo H5FAtest.lo H5FD.lo H5FDcore.lo \
+	H5FDdirect.lo H5FDfamily.lo H5FDint.lo H5FDlog.lo H5FDmpi.lo \
+	H5FDmpio.lo H5FDmpiposix.lo H5FDmulti.lo H5FDsec2.lo \
+	H5FDspace.lo H5FDstdio.lo H5FL.lo H5FO.lo H5FS.lo H5FScache.lo \
+	H5FSdbg.lo H5FSsection.lo H5FSstat.lo H5FStest.lo H5G.lo \
+	H5Gbtree2.lo H5Gcache.lo H5Gcompact.lo H5Gdense.lo \
 	H5Gdeprec.lo H5Gent.lo H5Gint.lo H5Glink.lo H5Gloc.lo \
 	H5Gname.lo H5Gnode.lo H5Gobj.lo H5Goh.lo H5Groot.lo H5Gstab.lo \
 	H5Gtest.lo H5Gtraverse.lo H5HF.lo H5HFbtree2.lo H5HFcache.lo \
@@ -439,6 +441,8 @@ libhdf5_la_SOURCES = H5.c H5checksum.c H5dbg.c H5system.c H5timer.c H5trace.c \
         H5EAiblock.c H5EAint.c H5EAsblock.c H5EAstat.c H5EAtest.c \
         H5F.c H5Faccum.c H5Fdbg.c H5Ffake.c H5Fio.c H5Fmount.c H5Fmpi.c H5Fquery.c \
         H5Fsfile.c H5Fsuper.c H5Ftest.c \
+        H5FA.c H5FAcache.c H5FAdbg.c H5FAdblock.c H5FAdblkpage.c H5FAhdr.c \
+        H5FAstat.c H5FAtest.c \
         H5FD.c H5FDcore.c  \
         H5FDdirect.c H5FDfamily.c H5FDint.c H5FDlog.c H5FDmpi.c H5FDmpio.c \
         H5FDmpiposix.c H5FDmulti.c H5FDsec2.c H5FDspace.c H5FDstdio.c \
@@ -666,6 +670,14 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/H5Edeprec.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/H5Eint.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/H5F.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/H5FA.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/H5FAcache.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/H5FAdbg.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/H5FAdblkpage.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/H5FAdblock.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/H5FAhdr.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/H5FAstat.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/H5FAtest.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/H5FD.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/H5FDcore.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/H5FDdirect.Plo@am__quote@