The restoration of a VSAM data set does not recatalog the data set. However, DFSMShsm can recatalog a VSAM data set if a backup version of the data set exists. To recatalog the restored data set, DFSMShsm first recovers the backup copy. The recovery of the backup copy recatalogs the data set. After recovering the backup version of the VSAM data set, DFSMShsm invokes DFSMSdss to restore the data set by replacing the version just recovered.
If a backup version of the data set does not exist or the attempt to recover the backup version fails, the VSAM data set that is restored to the target volume is uncataloged. A warning message is issued to alert you to your need to recatalog the data set. When a VSAM data set does not have a DFSMShsm backup version or has not been CATALOGED on the target volume, you must recatalog the data set by using the Access Method Services DEFINE command with the RECATALOG option. DFSMShsm does not recatalog a VSAM data set after a restore. When a restored VSAM data set replaces an existing data set or a recovered backup version, you should ensure that the catalog records reflect the desired conditions.
If DFSMShsm successfully recovered a backup version but the restore failed (for example, the allocated space or the control interval was too small), you should delete the recovered data set. After deleting the recovered data set, you should:
If the VSAM data set exists on the target volume when the recovery request is made, neither DFSMShsm nor DFSMSdss alters any preexisting catalog information for the data set. You are responsible for ensuring that the catalog information is correct.
No catalog entries are created or modified for these cases. DFSMSdss does restore the VSAM volume data set catalog entry. The data set cannot be an integrated catalog facility catalog. DFSMShsm processing causes the catalog to be opened if it is not already opened. DFSMSdss does not restore an open integrated catalog facility catalog. If you need to restore the catalog from a dump copy, refer to Restoring data sets or volumes directly with DFSMSdss.