Explanation: BACKUP, DUMP, MIGRATION, and
PRIMARY are mutually exclusive, required parameters that identify
for DFSMShsm the type of volume you are adding or changing.
- BACKUP
- identifies a volume to be used as a backup volume.
- DUMP
- identifies a volume to be used as the output of a full-volume
dump. DFSMShsm supports only tape units for the DUMP function. The unittype must be a valid tape unit or the ADDVOL command will fail.
- MIGRATION
- identifies a volume to be used as a migration volume. Migration
level 1 volumes must be DASD. Migration level 2 volumes can be either
DASD or tape.
- PRIMARY
- identifies a volume to be used as a primary volume. Primary
volumes must be DASD.
Defaults: None.
Note: If a volume record already exists for the specified volser, you cannot change the type of volume.