APC RAID Subsystem SCSI-SATA II - Manual (Page 77)

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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 (GB)” column to rollback the data, which
user can recover data to the time that snapshot is taken.
Rollback function has some constraints as described in the following:
1. Minimum RAM size of enabling rollback function is 512MB.
2. When doing rollback, the original UDV cannot be accessed for a while.
At the same time, the system connects original UDV and snap UDV,
and then starts rollback.
3. During rollback data from snap UDV to original UDV, the original UDV
can be accessed and the data in it just like it finished rollback. At the
same time, the other related snap UDV(s) can 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.
4.5 QCopy remote replication
IS16GL QCopy service is to build a IS16GL proprietary replication mechanism
for created UDVs. It will copy the logical user volume data exactly to the remote
place. The QCopy is built-in service without any host-based application for the
data replication and it has easy configuration setup from management UIs. The
first QCopy version on IS16GL FW V2.2.0 supports copy from one snapshot
UDVs of the source device to the remote target device.
QCopy V2.2.0 supports 2 copying tasks in the system which user can setup
QCopy to 2 snapshot UDV for replication in the same time. The target device
Caution
Before executing rollback, it is better to dismount file system for
flushing data from cache to disks in OS first. SB-3164-G1A3
also send pop-up message when user checks rollback
function.
Roll back snapshot UDV now?
Please dismount the disk in the host side first.