Operating System Software Owner manual

22 Disaster Recovery for 1-to-N Configurations
Before you begin disaster recovery:
Figure 26 (page 124)1. Acquaint yourself with the example Remote Copy pair
used to illustrate 1-to-N disaster recovery.
“System Information during Normal Operation” (page 125)2. Familiarize yourself with system information for 1-to-N
configurations.
“System Information during Failover” (page 127)3. Understand the system information to look for during a
failover.
Recover the systems:
“Recovering from Disaster” (page 128)1. Change secondary volume groups to primary.
2. Export recovered data if desired.
3. Recover the failed system.
4. Reverse the natural direction of data flow and
synchronize data.
5. Verify volume groups are started.
6. Restore the natural direction of data flow.
Additional Information:
• “About the Remote Copy Commands” (page 222)
• “Quick Disaster Recovery Guide” (page 220)
The disaster recovery steps for 1-to-N configurations refer to the example setup illustrated in
Figure 26 (page 124).
Figure 26 Example unidirectional 1-to-N configuration
Example second backup
system
Example first backup systemExample primary system
System3System2System1System name
116196System ID
124 Disaster Recovery for 1-to-N Configurations