You can use the BACKVOL command to request that DFSMShsm perform
any of the following tasks:
- Back up eligible data sets on one or a list of volumes, or dump
one or a list of DASD volumes
- Back up eligible data sets from all primary volumes
- Back up control data sets and the journal
- Back up eligible data sets from all volumes in one or more storage
groups
- Dump all volumes in one or more storage groups
Use the BACKUPDEVICECATEGORY parameter to specify whether to back
up the data sets to tape or to DASD daily backup volumes.
Backup messages are always recorded in the backup activity log.
When you issue the BACKVOL command with the DUMP optional parameter,
DFSMShsm requests that DFSMSdss does a full-volume dump of either
(1) each DASD volume specified with the VOLUMES parameter or (2) each
eligible DASD volume in each storage group specified with the STORAGEGROUP
parameter. In the first case, the full-volume dumps are stacked on
dump volumes in those dump classes if:
- Dump classes specified on the command call for stacking, or
- The STACK subparameter is specified
In the second case, the full-volume dumps are stacked on dump
volumes if:
- Dump classes specified on the command call for stacking, or
- The STACK subparameter is specified, or
- The dump classes associated with a storage group or volume call
for stacking
For full-volume dumps, you can decide to print dump messages at
the system console (TERMINAL). Dump messages are always recorded
in the dump activity log.
You can specify the BACKVOL command with the CONTROLDATASETS parameter
to back up the DFSMShsm control data sets and journal or you can specify
CONTROLDATASETS(NULLJOURNALONLY) to null the journal without backing
up the control data sets. Backup messages for the control data sets
are written to the backup activity log.