Explanation: DUMP, INCREMENTAL, and TOTAL
are mutually exclusive, optional parameters of VOLUME specifying which
data sets are to be backed up. A message is issued and the backup
or dump is not processed if:
- DFSMShsm is running in a non-SMS environment.
- The SMS-managed volume is in initial status
(contains both SMS-and non-SMS-managed data sets while in the process
of being converted to an SMS-managed volume).
- DFSMShsm cannot determine if the specified volume is SMS-managed.
- DUMP
- specifies that a DFSMSdss full-volume dump be performed for
a single volume. All specified subparameters process the volume and
thereby override the dump classes, defined for the storage group which
is associated with the volume.
Note: The DUMP subparameters
DUMPCLASS, RETENTIONPERIOD, and STACK, are described separately.
- INCREMENTAL
- specifies that only those data sets that have never been backed
up or have been changed since their last backup version was created
are eligible for backup. If a data set is a changed data set, the
frequency requirement as defined in the data set’s management
class must be met before DFSMShsm backs up the data set.
- TOTAL
- specifies that all the data sets on the volume are to be backed
up unless the data set is excluded by its management class.
Defaults: The default is INCREMENTAL.