HP XP P9500 Storage - Manual (Page 62)

Resynchronizing mirrors
When you resynchronize a mirror, all the pairs with the mirror ID are re-synchronized.
Use this procedure also to perform the delta resync operation on all pairs in a mirror or to change
pair status of all pairs in the mirror from Hold(Failure) to Hold.
Prerequisite information
This operation must be performed from the primary system only.
The following additional information may be useful to you before beginning the procedure:
•
Remote Web Console does not support multiple primary and secondary systems in a Cnt Ac-J
system. In this case, use RAID Manager to restore a mirror.
•
Use RAID Manager to restore a mirror that is in a RAID Manager consistency group containing
multiple journals.
•
Resynchronizing a mirror when I/O load is low reduces impact on performance.
Procedure 11 To resynchronize a mirror
1. In the Remote Web Console main window, select Actions > Remote Copy > Continuous Access
Journal > Journal Operation.
2. Click to change the mode from View to Modify.
3. In the tree, expand Registered then select the LDKC.
4. In the list or mirrors in the right pane, right-click a pair that you want to resync, perform the
delta resync operation on, or to change the status from Hold(Failure) to Hold, then select Mirror
> Pairresync > and one of the following:
•
Stopped to resynchronize the pairs in the mirror.
•
Hold or Holding to perform the delta resync operation on all pairs in the mirror.
•
Hold(Failure) to change the status of the mirror to Hold.
5. In the Pairsplit-r dialog box, click Set.
6. To resynchronizeresume other mirrors, repeat steps 2 through 5.
7. Review settings in the Preview list in the Journal Operation window.
To cancel a setting, right click the mirror and click Cancel.
8. Click Apply to restore the mirror(s).
Deleting pairs
When you delete a pair, the Cnt Ac-J relationship between the P-VOL and S-VOL is released. Only
the relationship is affected, the data volumes and their data remain.
Prerequisite information
•
This operation can be performed from the primary or secondary system.
•
When S-VOLs are physically attached to the same host as P-VOLs, take the S-VOLs offline
before releasing the pair. Doing this avoids confusion and possible error when the host is
restarted.
•
When deleting pairs in a journal that is in a RAID Manager consistency group consisting of
multiple primary and secondary systems, make sure to select Mirror in the Range field. If you
select LU, make sure the pair is suspended; otherwise it will not be deleted.
The following additional information may be useful to you before beginning the procedure:
•
When a pair deletion is initiated, differential data is transferred from S-VOL, the pair
relationship is deleted, and the volumes’ status becomes SMPL.
•
A pair can be deleted regardless of its status. However, data consistency is not guaranteed
unless status is Paired.
62 Pair operations