Concepts and Facilities › Special Considerations › File Descriptor Table (FDT) and the Archive Process

File Descriptor Table (FDT) and the Archive Process

When a compressed data set is used for archival or off-site storage purposes, place a copy of the FDT used to compress the data set on the archive medium with the archive data set. If the FDT is lost, or modified for any reason, the data set is unusable. You can use IEBCOPY to unload the FDT load module.