This sub-section explains how the Tape Backup function of AdvancedCopy Manager restores backup data.
Restore processing refers to restoring the data of a transaction volume from the backup volume or tape that is managed with backup history information. The restoration operation restores data from a backup volume managed by the backup carrier information to a transaction volume. Restoration from a backup volume involves using the OPC function provided by the ETERNUS storage system to restore data from a backup volume to a transaction volume. If the data on a backup volume under carrier management is restored to a transaction volume, the carrier management information will not change.
In restoration from tape, tape data is read and written directly to the restoration destination (transaction) volume.
When data backed up to both a disk and tape is restored based on history information, the Tape Backup function automatically selects disk data, unless otherwise specified, and restores it by OPC.
Note that data will be restored to a transaction volume that is the backup source. However, you can change the restoration destination.
Note
If transaction volume contents are rewritten in the period between collection of the latest backup volume and a subsequent restore operation, the rewritten data will be lost.
Figure 5.8 Notes on restoration with AdvancedCopy Manager
TD: Transaction volume
BD: Backup volume
