Restoring Data From A Tape Backup - Hitachi AMS2100 User Manual

Restoring data from a tape backup

6-10
Hitachi AMS 2000 Family Copy-on-Write SnapShot User Guide
•
Figure 6-1: Backing-up to Tape
Data can be restored from a tape backup to a V-VOL or P-VOL.
Restoring to the V-VOL results in less impact on your SnapShot
system and on performance.
• If restoring to the V-VOL:
- Data must be restored to the V-VOL from which the tape
backup was made.
- Data can then be restored from the V-VOL to the P-VOL. The
P-VOL must be unmounted before its restoration.
- Data pool capacity should be 1.5-times the capacity of the
P-VOL.
• If restoring to the P-VOL:
- Unmount the P-VOL.
- Return all pairs to Simplex (recommended in order to
reduce build-up of data in the data pool and impact to
performance).
- Use this method when the V-VOL is in Failure status (V-VOL
data is corrupt), or when capacity of the data pool is less
than 1.5-times the capacity of the P-VOL.
Using SnapShot