Encrypted FlashCopy image copies, copies made with DFSMSdss concurrent copy, and system-level backups
System-level backups, backups for FlashCopy image copies, and copies that are made by DFSMSdss concurrent copy are allocated with the same key label as the table space and index space data sets.
For replication and disaster recovery, the same key information must be available at the recovery system in order to subsequently access the data.
FlashCopy image copies and concurrent copies
For FlashCopy image copies, the COPY, REORG, LOAD, or REBUILD INDEX utilities invoke DFSMSdss with the COPY command to create backups. The FlashCopy image copies are allocated with the key label for the data sets of the table space or index space.
For concurrent image copies, the COPY utility invokes DFSMSdss with the DUMP command to create backups. The concurrent copy data sets will be allocated with the key label for the data sets of the table space or index space.
During recovery from a FlashCopy image copy or concurrent copy, the RECOVER utility invokes
DFSMSdss with the COPY and RESTORE commands respectively to restore the backup. FL 502 If
the key label for the storage group was altered after the copies were created, the key label for
table spaces and index spaces may be different after the recovery, and might not match the current
key label specified for the table space or storage group.
FL 502 The DFSMSdss COPY or RESTORE command fails if the data set attributes of the FlashCopy image copy
or concurrent copy are different than the data set attributes of the table space and index space.
Data set attributes include the encryption status (encrypted versus non encrypted) and the format
(extended format versus basic format). For the DB2 RECOVER utility, this DFSMSdss restriction means
that point-in-time recovery of an object will fail with a DFSMSdss error during the restore of a
FlashCopy image copy or concurrent copy, if the encryption status of the table space and index space
data sets have changed since the backup was created. As a work around, use IDCAMS ALTER NEWNAME or
IDCAMS DELETE on the table space and index space data sets then execute the RECOVER utility. During
recovery, DFSMSdss will create and allocate the table space and index space data sets automatically
with attributes that match the FCIC or concurrent copy.
System-level backups of encrypted data sets
The BACKUP SYSTEM and RESTORE SYSTEM utilities invoke DFSMShsm to backup and restore Db2 production disks with FlashCopy at the volume level. The background or physical copy copies encrypted data.