HP 3PAR Operating System Software - Manual (Page 207)

The disaster recovery sequence is as follows:
1.
Failover Remote Copy groups to the backup system.
2. Recover the Remote Copy groups to the primary (source) system once the source server has
been brought back up and is running normally.
3. Restore the Remote Copy groups to their normal operation.
The following topics provide instructions on performing disaster recovery:
“Failover Remote Copy Groups” (page 207)
“Switch Failover Remote Copy Groups” (page 207)
“Recover Remote Copy Groups” (page 208)
“Restore Remote Copy Groups” (page 209)
The HP 3PAR Management Console also provides the flexibility to "undo" a disaster recovery
failover operation. This is described in
“Revert Remote Copy Groups” (page 208) .
Failover Remote Copy Groups
When the source system in a Remote Copy setup becomes unavailable, you can perform a failover
operation on the Remote Copy groups in order to continue your normal operations on the backup
system(s) while the primary system is down.
To failover Remote Copy groups:
1.
Navigate to the Remote Copy Groups screen.
2. In the right pane, select the Remote Copy group(s) you wish to failover.
3. Right-click and select Stop Remote Copy Group(s).
4. Select the stopped groups.
5. Right-click and select Failover Remote Copy Group(s).
The Remote Copy Failover dialog box appears.
When performing failover on Remote Copy groups, the groups on the backup system reverse
roles to become primary groups, i.e. data is written directly to those groups as data would
normally be written to groups on the primary system.
6. (Optional only in SLD configuration) Click Advanced to display additional failover options. If
you do not want to check for newer data, select Do not check other targets for newer data.
7. Click OK.
8. Click Yes when prompted for confirmation.
In the right pane of the Remote Copy Groups screen:
•
Primary-Rev is displayed under the Backup Role column indicating that the groups on the
backup system are currently acting as the primary groups. Any data is written to the groups
on the backup system.
•
The DR state column displays Failover.
Switch Failover Remote Copy Groups
NOTE: The switch failover operation is only allowed for Synchronous Long Distance Remote
Copy setups.
For Synchronous Long Distance Remote Copy, the HP 3PAR Management Console allows you to
switch failover of Remote Copy groups from one backup system to the other backup system. For
example, in a Synchronous Long Distance Remote Copy setup where source system A is backed
up to backup systems B and C, if Remote Copy groups are failed over from source system A to
backup system B, you can switch failover from backup system B to backup system C.
Using Remote Copy for Disaster Recovery 207