Selecting DASD and tape daily backup volumes

If you specify BACKUP(ANY) on the SETSYS command, you must ADDVOL DASD or Tape daily backup volumes to DFSMShsm for daily backup selection. DFSMShsm selects the first non-full, unallocated, daily backup volume assigned to the current day in the backup cycle, regardless of its device category. If you want DFSMShsm to use tape as a daily backup volume and you do not specify restrictions limiting selection to tape, you must define at least one tape for each of the appropriate days in the backup cycle by using the ADDVOL command. DFSMShsm does not select a scratch tape if no daily or unassigned, nonful backup volumes are found already defined to DFSMShsm. If DASD daily backup volumes are not being used in your environment, specify SETSYS BACKUP (TAPE) rather than SETSYS BACKUP (ANY). This allows flexibility of backing up to a scratch tape if an eligible daily backup volume is not found. You do not have to define tapes as daily backup volumes with the ADDVOL command if you restrict daily backup volumes to a tape by:

• Specifying BACKUP (TAPE) on a SETSYS command.
• Specifying BACKUPDEVICECATEGORY (TAPE) on a BACKVOL command.
• Specifying BACKUPDEVICECATEGORY (TAPE) on the ADDVOL command of the nonSMS volume being backed up. When daily backup volumes are restricted to tape in one of these ways, DFSMShsm selects a scratch tape if an eligible daily backup volume is not found.