HP XP P9500 Storage - Manual (Page 95)

After you remove failures from the intermediate site, you can set up the original cascade
configuration.
Procedure 29 To restore the intermediate site and cascade configuration
1. If the status of the primary-intermediate site pair is SUSPENDED, resynchronize the pair.
2. Delete the primary-secondary site delta resync pair. As a result of this operation, the
intermediate-remote site pair is also deleted.
3. Create a pair between the intermediate and secondary sites. Specify Entire for Initial Copy.
4. Create a delta resync pair between the primary and secondary sites.
Recovery when the primary-intermediate path fails
When the data path between the primary and intermediate sites fails, the status of journals in these
sites might change to Stopping (with pair status changed to Suspending). Stopping status maintains
journal data for a delta resync operation.
You can recover in either of the following ways:
•
By correcting the problem then resyncing primary-intermediate sites.
•
By performing the delta resync between primary-secondary sites
Procedure 30 To recover by resynchronizing primary and intermediate sites
1. Delete the delta resync pair between the primary and secondary sites.
2. Confirm that the status of the journal between the primary and intermediate sites is changed
to Stop.
3. Remove the path error.
4. Resync the pair between the primary and intermediate sites.
Procedure 31 To recover using the delta resync between primary-secondary sites
• Run the delta resync operation on the delta resync pair set up between the primary and
secondary sites.
This changes the journal status between the primary and intermediate sites.
Recovery for 3 Cnt Ac-J DC multi-target configuration
When the primary site fails, you move business operations to a remote site. When the primary site
is recovered, you move operations back.
Recovery for 3 Cnt Ac-J data centers 95