User manual

Tips

Daily snapshot will be taken at every 00:00. Weekly snapshot

will be taken on every Monday 00:00.

4.4.3 Rollback

The data in snapshot UDV can rollback to original UDV. Please follow the

procedures.

1. Select “/ Volume config / User data volume”.

2. Take one or more snapshots. Please refer to section 4.4.1 for more

detail.

3. Click “

” in “Snapshot (MB)” column to rollback the data, which is at

the time of taking snapshot.

Rollback function has some constraints as described in the following:

1. Minimum RAM size of enabling rollback function is 512MB.

2. When executing rollback, the original UDV cannot be accessed for a

while. At this time, transfer connections from original UDV to snap UDV,

and then start rollback.

3. During rollback data from snap UDV to original UDV, the original UDV

can be accessed and the data in it shown just like finished rollback. At

the same time, the other related snap UDV(s) will not be accessed.

4. After rollback process finished, the other related snap UDV(s) will be

deleted, and snapshot space will be set to 0.

Caution

Before executing rollback, it is better to dismount file system for

flushin

data from cache to disks in OS.

4.5 Disk roaming

Physical disks can be re-sequenced in the same system or move whole physical

disks from system-1 to system-2. This is called disk roaming. Disk roaming has

some constraints as described in the following:

Enhance technology UltraStor RS16

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