In the first phase of automatic dump on the primary host, the expired dump copies are deleted. Dump copies become eligible to be automatically deleted when they expire or when the maximum number of dump generations is reached and a new generation of dump copies is to be made. Dump copies are automatically deleted after the number of days specified in the RETENTIONPERIOD subparameter of the DUMPCLASS parameter of the DEFINE command has elapsed. This phase of automatic dump causes the status of the dump tapes containing the deleted copies to be changed from expired to available if they remain under DFSMShsm control.
Automatic dump expiration is performed at the dump class level for both copy pool volumes and non-copy pool volumes. DFSMShsm does not automatically delete the last and only remaining copy of a source volume. The dump volumes that make up this dump copy remain in EXPIRED status. To determine which dump tapes are currently in EXPIRED status, issue the LIST DUMPVOLUME command with the SELECT(EXPIRED) option. To delete the dump volumes in this copy, issue the DELVOL command with the LASTCOPY option for one of the dump volumes. The COPYPOOLCOPY keyword must also be specified if the dump volumes belong to a copy pool version. All volumes in the copy are then deleted. You can delete the last dump class for a copy pool version using the FRDELETE command. Automatic dump expiration of copy pool copies may extend the automatic dump window because of the additional CDS records that need to be accessed and any overlap with existing non-copy pool dump expiration.