Process command line options
It is noop...
Open the file tmp.h5
Going to process dataset: /DSET_NDATA_BT1...
Open the dataset
Retrieve the dataset's layout
Verify the dataset is a chunked dataset
Retrieve the dataset's chunk indexing type
Chunk indexing type is already version 1 B-tree: no further action
Close the dataset
Close the dataset creation property list
Not processing the file's superblock version...
Close the file