COMPACT DASDBACKUP and NODASDBACKUP: Specifying whether to compact data sets during backup to DASD

Explanation: DASDBACKUP | NODASDBACKUP are mutually exclusive, optional subparameters of the COMPACT parameter specifying whether or not to compact a data set when DFSMShsm backs it up to DASD.

Subparameter Explanation
DASDBACKUP DFSMShsm can compact a data set when DFSMShsm backs it up to DASD.
NODASDBACKUP DFSMShsm does not compact a data set when DFSMShsm backs it up to DASD.

SMS relationship: Parameter differs in meaning when applied to SMS-managed or non-SMS-managed DASD volumes or data sets.

SETSYS default: None.

DFSMShsm default: If you do not specify either subparameter on any SETSYS command, the DFSMShsm default is NODASDBACKUP.
Note:
  1. If you do not want a specific data set to be compacted during volume backup, use the data set backup exit (ARCBDEXT) to prevent compaction.
  2. Since compressed format data sets are already compressed, they will not be compacted during backup to DASD.
Parent topic: Optional parameters of the SETSYS command