HP XP7 Storage - Manual (Page 51)

6. In the Confirm window, review the settings and enter a task name in the Task Name box.
7. Click Apply to save your settings to the system.
Deleting Cnt Ac-J 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.
•
Pairs must be in Suspend status when their journal is in a RAID Manager consistency group
consisting of multiple primary and secondary systems. If all pairs in the journal are not in
Suspend status, you can delete the desired pairs individually, or select Mirror in the Range
field, which deletes all pairs in the pair’s mirror.
The following additional information may be useful to you before beginning the procedure:
•
When a pair deletion is initiated, differential data is transferred from the S-VOL, the pair
relationship is ended, and the volumes’ status becomes unpaired.
•
Pairs should be in PAIR status to ensure data consistency between volumes. However, a pair
can be deleted in any status except Suspending or Deleting.
•
If the operation fails, the P-VOL nevertheless becomes unpaired, but transfer of differential
data to the S-VOL is terminated.
•
If you plan to delete all pairs in the journal and then create another pair, be sure to wait at
least one minute after deleting the pairs before creating the new pair.
•
Perform pair deletion when write I/O load is low to reduce impact on performance. Operations
on pairs with different status in the same mirror may result in suspension during periods of
heavy write I/O.
•
If you delete pairs in PAIR status and other than PAIR status in the same mirror, an unexpected
suspension could occur during the operation under heavy I/O load conditions. You can
estimate whether the I/O load is heavy or not from frequency of host I/Os. This operation
should be performed under light I/O load conditions.
•
In a delta resync configuration, if you release the Cnt Ac-S pair, the Cnt Ac-J delta resync pair
is released as well. If you release the Cnt Ac-J pair, the Cnt Ac-J delta resync S-VOL is released.
Procedure 7 To delete pairs
1. In the Storage Systems tree, click Replication > Remote Replication, and then select the Cnt
Ac-J Pairs tab.
2. From the list, select the pairs to be deleted.
3. From the Actions menu, click Remote Replication > Delete Pairs.
4. In the Delete Pairs dialog box, review the pairs in the Selected Pairs table. You can remove
a pair from the table by selecting it and clicking Cancel.
Deleting Cnt Ac-J pairs 51