Explanation: BACKUPDEVICECATEGORY is an optional
subparameter of the PRIMARY parameter specifying the type of device
that receives the backup versions of the data sets when DFSMShsm backs
up the primary volume. The parameters of the BACKUPDEVICECATEGORY
parameter are explained:
- TAPE
- specifies that the backup version of a data set on the primary
volume resides on a tape daily backup volume.
- DASD
- specifies that the backup version of a data set on the primary
volume resides on a DASD daily backup volume.
- NONE
- specifies that DFSMShsm selects the first available, nonfull
tape or DASD daily backup volume where the backup version of a data
set resides.
Defaults: If you are adding a primary volume
to DFSMShsm and do not specify BACKUPDEVICECATEGORY, the default is
NONE. If you are changing the attributes of a volume and do not specify
BACKUPDEVICECATEGORY, the previous backup device category remains
in effect.
Note: - If you change the backup device category for a volume with a subsequent
ADDVOL command, DFSMShsm could fail an undirected recall of a migrated
data set when the LIKE subparameter of the SETSYS RECALL command is
in effect. With the LIKE subparameter specified on the SETSYS RECALL
command, DFSMShsm automatically recalls a data set to a volume only
if that volume has the same backup device category as the primary
volume that the data set used to be on. Therefore, if DFSMShsm cannot
find a primary volume with the same backup device category as the
original primary volume, DFSMShsm cannot automatically recall the
migrated data set. To avoid this problem, you can specify the UNLIKE
subparameter with the SETSYS RECALL command.
- In a multiple-DFSMShsm-host environment, you can add the same
volume to different DFSMShsm hosts. When you do that, the backup device
category for that volume should be the same in all DFSMShsm hosts
or the last one specified with the ADDVOL command is the one in effect.