Recovering from disaster, Failover – HP 3PAR Operating System Software User Manual
Page 128
Recovering from Disaster
Failover
1.
Reverse the role of all volume groups on the system that is still in normal operation (the failover
system). On the failover system (for example, System2), enter:
# setrcopygroup failover -t
•
- Name of the target system that failed (System1)
The setrcopygroup failover -t command:
•
Changes all secondary volume groups on the failover system (periodic_group_1.r96 on
System2) to primary volume groups, and therefore reverses the direction of data replication
•
Enables I/O to the reversed volume groups (periodic_group_1.r96)
NOTE:
If you do not want to perform disaster recovery operations on all volume groups on
a system, you can use all of the disaster recovery commands on one or more specified volume
groups. For more information, see the description of each command in
.
2.
Verify the reversal of volume group roles.
a.
Issue the showrcopy command on the failover system (System2).
b.
In the Group Information area, check that the Role column for the reversed volume group
displays Primary-Rev (primary as a result of reversal).
For example, the showrcopy output on System2 shows that the role of periodic_group_1.r96
is now Primary-Rev:
# showrcopy
Remote Copy System Information
Status: Started, Normal
Target Information
Name ID Type Status Options Policy
System1 7 IP failed mirror_config
Link Information
Target Node Address Status Options
System1 0 10.100.33.96 Down
System1 1 10.101.33.96 Down
receive 0 10.100.33.96 Down
receive 1 10.101.33.96 Down
Group Information
Name Target Status Role Mode Options
periodic_group_1.r96 System1 Stopped Primary-Rev Periodic over_per_alert
LocalVV ID RemoteVV ID SyncStatus LastSyncTime
remotevv.0 21 localvv.0 413 Stopped Thu Dec 14 18:23:52 PST 2006
remotevv.1 22 localvv.1 414 Stopped Thu Dec 14 18:23:52 PST 2006
3.
(Optional) To back up data in the reversed volume groups, export the reversed virtual volumes
(for example, remotevv.0 and remotevv.1) as read/write snapshots.
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Disaster Recovery for 1-to-N Configurations