DFSMSrmm records the expiration date for a volume when each data set is written to the volume. You can change this date to extend the time before a volume is released without writing to the volume again.

Use the CHANGEVOLUME subcommand with the EXPDT or RETPD operands, or the Change Volume panel to change the expiration date or the retention period for a volume. You can change the expiration date or the retention period anytime after the volume has been defined to DFSMSrmm and before the expiration date is reached. Retention periods set by one or more vital record specifications that are defined for the volume or for one or more data sets on the volume might override this expiration date.

See CHANGEVOLUME: Changing volume information or Changing volume information for more information on changing the expiration date.