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Are there limitations to HDF4 files?

Yes. Here are some of the limitations on HDF4 files:

  • HDF4 files cannot be larger than 2 GB.
  • There is a limit of 20000 objects in an HDF4 file. Usually the limit is even less than that, and depends on the type of objects or features used.
  • Minimal parallel I/O support.
  • Supports only 1-D array of compound datatypes.
  • Cannot easily delete or move objects in a file.
  • Supports only 1 unlimited dimension (SD).
  • Datasets with an unlimited dimension cannot be chunked or compressed. (SD)