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.Deleting pairs
A TrueCopy pair can be deleted. Doing this deletes the TC 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 PSUS (Delete pair to RCU).
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.
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.
To delete pairs
In Hitachi Command Suite:
On the Resources tab, expand the Storage Systems tree, right-click the target storage system and click Remote Replication.
In Device Manager - Storage Navigator
Click Storage Systems, and then expand the Storage Systems tree.
In the Storage Systems tree, click Replication > Remote Replication.
In the Remote Replication window, click the TC Pairs tab then select the pairs to be deleted.
In the TC Pairs tab, click More Actions > Delete Pairs.
In the Delete Pairs window, ensure that the pairs to be deleted appear in the Selected Pairs table.
For Delete Mode, specify one of the following:
Normal: Deletes the pair only if the primary system can change both P-VOL and S-VOL to unpaired volumes.
Force: Forcibly deletes pairs even when the primary system cannot communicate with the secondary system.
Click Finish.
In the Confirm window, review the settings and enter a task name in the Task Name box.
Click Apply to save your settings in the system.