Recovering DASD Volumes

Volume recovery is the process of copying all data back to a user DASD volume.

You can use volume recovery commands to perform the following recovery tasks:

Restore a volume from the DFSMSdss dump copy with the option to recover individual data sets to the level of the most recent DFSMShsm incremental backup data set versions. This option scratches restored data sets that are now invalid because they:
- Were already migrated or were scratched after the dump copy was made
- Are uncataloged but have the same name as a cataloged data set
Restore the volume only from the DFSMSdss dump copy
Recover the volume only from the DFSMShsm incremental backup data set versions

The multitasking capabilities of individual data set recovery can speed volume recovery when incremental data set backup versions are used in the recovery process. The incremental backup data sets are scheduled to be processed by data set recovery tasks, rather than being processed by the volume recover task. If more than one volume is being recovered, DFSMShsm schedules the incremental data set recovery requests for one volume and the recovery process can immediately begin on the next volume, lessening the time needed for the total recovery process.