HP XP P9500 Storage - Manual (Page 94)

7. Execute the pairresync -swaps command, which reverses P-VOLs and S-VOLs and resynchronizes
the pairs. Copy flow is from the primary site to the secondary site (was disaster recovery site).
NOTE: When you execute the pairresync -swaps command, you can use the -d option to
specify a data volume. However, the command is rejected if the restore journal where the
data volume belongs is in Active, Halting or Stopping status.
Disaster recovery when the system consists of multiple primary and
secondary storage systems
Recovering the primary site from a failure when the system consists of multiple primary
and secondary storage systems
If a disaster or a failure occurs on the primary site, where the system consists of multiple primary
and secondary storage systems, you can continue the business tasks in the remote site and maintain
the data consistency in the RAID Manager consistency group. If a disaster or a failure occurs on
the primary site, first transfer the tasks from the primary to secondary site.
To transfer the business tasks to the secondary site by using RAID Manager:
1.
Switch the operations from the primary to secondary site.
2. Specify the swap option and split the pair (pairsplit -RS).
3. Confirm that the status of all Continuous Access Journal secondary volumes in every secondary
storage systems become SSWS.
4. Using the volumes in SSWS status in the secondary storage systems, resume the business tasks
on the secondary site.
For information on how to use RAID Manager, see HP P9000 RAID Manager User Guide.
Transferring business tasks to primary site after recovering from primary site failures
You can transfer your business tasks back to the primary site after removing failures from the primary
site and other locations if you follow the instructions in Recovering the Primary Site from a Failure
When the System Consists of Multiple Primary and Secondary Storage Systems.
To transfer the business tasks to the primary site:
1.
Confirm that all Continuous Access Journal secondary volumes in all secondary storage systems
are in the SSWS status.
2. Specify the swap option and resynchronize the pair (pairresync -swaps).
3. Switch the operations from the secondary to primary site.
4. Execute the takeover command from the primary site.
94 Disaster recovery operations