RESTORE/RECOVER › Implicit Recovery and Volume Defragmentation

Implicit Recovery and Volume Defragmentation

A group of data sets, data sets on an entire volume, or a group of volumes, however, are restored through the RECOVER command. Recover processing makes use of all of the applicable RESTORE parameters, plus several additional ones needed to provide greater flexibility unique to the recovery process.

When recovery is being applied to a new volume, or to one or more volumes with sufficient space, the standard benefits provided by individual data set restores are expanded to the volume level:

• Multiple data set extents are combined, resulting not only in defragmented data sets, but defragmented volumes as well.
• PDS data sets are compressed.
• ISAM and VSAM clusters are reorganized.
• Different device types can be used.
• CATALOG entries can be recreated (including VSAM).

See the RESTORE command to restore an individual data set or cluster.