Software

Continuous Access XP user guide for the XP1024/XP128 91
Delete a Continuous Access XP pair from the RCU only for disaster recovery (see ”Continuous Access XP
disaster recovery operations” on page 97). When a Continuous Access XP pair is deleted from the RCU,
the RCU changes the S-VOL pair status to SMPL, but does not change the pair status of the corresponding
P-VOL. When the MCU performs the next Continuous Access XP operation, the MCU detects that the
S-VOL status changed, and changes the P-VOL status to PSUS-pairsplit-S to RCU. To restart a pair deleted
from the RCU, delete the pair from the MCU, and create the pair from the MCU using the appropriate
initial copy option (Entire or No Copy) to restart the pair.
To delete all Continuous Access XP Async pairs in a consistency group, delete pairs from the MCU. The
Continuous Access XP pair status changes to Deleting when the pairsplit-S operation is accepted by the
MCU and RCU, and changes to SMPL after the internal pairsplit-S process is complete. To delete
Continuous Access XP Async pairs according to consistency status (for example, for disaster recovery),
delete the pairs from the RCU.
CAUTION: When you delete a Continuous Access XP pair from the RCU, remember that the S-VOL and
P-VOL are identical (for example, same volume label), and take appropriate precautions to prevent a
system problem due to duplicate volumes.
Use the Pairsplit-S command to delete one or more Continuous Access XP pairs. When the Pairsplit-S
command is selected, the Pairsplit-S pane appears. Use the Pairsplit-S pane to change Pairsplit-S options
(by force, and Continuous Access XP Async delete range) for pairs selected on the Volume list on the
Continuous Access XP main pane.
Figure 53 Pairsplit-S pane
• Volume: Port - Host Group - LUN of the selected volume.
NOTE: If # is added to the end of the LDEV number, such as 00:3C#, the LDEV is an external
volume. For details about external volumes, see the HP StorageWorks External Storage XP user
guide.
• Delete Pair by Force: Restriction on deleting a Continuous Access XP volume pair.
• Yes: Pairs are deleted even if the MCU cannot communicate with the RCU. Use this option to free a
host waiting for device-end from an MCU that cannot communicate with its RCU, thus allowing host
operations to continue.
• No: Pairs are deleted only if the MCU can change the pair status of the P-VOL and S-VOL to SMPL.
When the status of the pair is SMPL or Deleting, the default is Yes (cannot be changed). When the
status of the pair is not SMPL or Deleting, the default is No.
• Asynchronous Parameters: Delete Range: Simplifies disaster recovery operations for Continuous
Access XP Async consistency groups at the RCU (secondary (remote) disk array).
Continuous Access XP delete range options are:
• Group (MCU or RCU): The MCU/RCU deletes all Continuous Access XP Async pairs in the same
consistency group as the specified pair, regardless of pair status and consistency status.