User manual

4.4.3 Rollback
The data in snapshot VD can be roll back to original VD. Follow the steps below.
1. Select “/ Volume configuration / Snapshot”.
2. Move cursor to the gray button next to the Snap VD number which user
wants to rollback the data ; click “Rollback”.
3. Done, the data in snapshot VD will rollback to original VD.
Rollback has some constraints as describe d”
1. Minimum RAM size of enabling rollback is 512MB.
2. When making a rollback, the original VD cannot be accessed for a
while. At the same time, the system connects to original VD and the
snapshot VD, and then starts rollback.
3. During rollback, data from snapshot VD to ori ginal VD can be
accessed. At the same time, the other related snapshot VD(s) can not
be accessed.
4. After rollback, the other snapshot VD(s) after the VD rollback is
completed will be deleted.
Tips
Daily snapshot will be taken every 00:00. Weekly snapshot will
be taken every Sunday 00:00. Monthly snapshot will be taken
every first day of month 00:00.
Caution
Before executing rollback, it is best to dismount iSCSI drive for
data to be flashed from cache to disks. The system sends a
pop-up message when user executes rollback function .