Operating System Software User Manual

26 Quick Disaster Recovery Guide
See:To recover from primary system downtime for:
“Quick Recovery: 1-to-1 and M-to-N Remote-Copy
Configurations” (page 259)
1-to-1
N-to-1
1-to-N
“Quick Recovery: Synchronous Long Distance
Configurations” (page 260)
SLD
For additional information, see the following:
• “Disaster Recovery for 1-to-1 Configurations” (page 171)
• “Disaster Recovery for N-to-1 Configurations” (page 181)
• “Disaster Recovery for 1-to-N Configurations” (page 191)
• “Disaster Recovery for Synchronous Long Distance” (page 202)
• “About the Remote-Copy Commands” (page 261)
Quick Recovery: 1-to-1 and M-to-N Remote-Copy Configurations
Table 13 Quick Recovery Steps for 1-to-1 and M-to-N Remote-Copy Configurations
Failed/Recovered SystemFailover SystemStep
setrcopygroup failover -t
<target_name>
1. Change secondary volume groups
to primary.
(of failed system)
showrcopy2. Verify group reversal.
(Optional) Export the reversed virtual
volumes as read/write snapshots.
3. Back up data.
Recover the failed system.4. Prepare to resume normal
operation.
Stop I/O to the reversed volume
groups.
5. Stop writes.
setrcopygroup recover -t
<target_name>
6. Reverse the natural direction of
data flow and synchronize the
systems.
(of recovered system)
showrcopyshowrcopy7. Verify synchronization.
showrcopy groups <group_name>8. Verify volume groups are started.
(Do not continue until groups are
started and synced.)
(of volume group that should be started)
setrcopygroup restore -t
<target_name>
9. Restore the natural direction of
data flow.
(of recovered system)
showrcopyshowrcopy10. Verify natural data flow restored.
Quick Recovery: 1-to-1 and M-to-N Remote-Copy Configurations 259