HP XP7 Storage - Manual (Page 72)

Deleting pairs
A Continuous Access Synchronous Z pair can be deleted. Doing this deletes the Cnt Ac-S Z
relationship, though not the volumes or their data.
•
When it is no longer necessary to maintain a remote copy of the P-VOL, delete a pair from
the primary system only. All update operations are stopped and pair status for both the P-VOL
and S-VOL changes to unpaired.
When a pair is deleted, the primary system continues to accept write I/O to the former P-VOL
but does not keep track of the updates.
•
Delete a pair from the secondary system only for disaster recovery purposes. When you do
this, the secondary system changes the S-VOL pair status to unpaired, the primary system
detects that the S-VOL status is unpaired, and then changes P-VOL status to Suspend-delete
pair to RCU.
The CDELPAIR TSO command can be used to delete pairs from the MCU.
To restart a pair that was deleted from the secondary system, you must delete the pair from
the primary system, then create the pair from the primary system.
NOTE: When you delete a pair from the secondary system, make sure that the S-VOL and P-VOL
are identical, including the volume labels. Take all necessary steps to prevent system problems due
to duplicate volumes.
Procedure 14 To delete pairs
1. In the Storage Systems tree, click Replications > Remote Replications.
2. In the Remote Replications window, click the Cnt Ac-S Pairs tab, then select the pair or pairs
to be deleted.
3. From the Actions menu, click Remote Replications > Delete Pairs.
4. In the Delete Pairs window, ensure that the pairs to be deleted appear in the Selected Pairs
table.
72 Cnt Ac-S Z pair operations