HP XP Racks - Manual (Page 39)

operation, it detects that S-VOL status as SMPL and changes P-VOL status to PSUS. The suspend
type is Delete pair to RCU.
TIP: Best Practice: Release a pair from the P-VOL. If the pair has a failure and cannot be released
from the P-VOL, then release it from the S-VOL.
1. Verify that the P-VOL has the latest data using one of the following methods:
•
On the secondary storage system, open the Pair Operation window. Check that the
Volume Access column for the S-VOL is blank (must not show Access Lock).
•
Use the multipath software command to check if the P-VOL path (owner path) is online.
2. Vary the S-VOL path offline using the multipath software command.
3. Access the MCU in RWC, then click Actions > Remote Copy > Continuous Access Synchronous
> Pair Operation.
4. Make sure that you are in the modify mode.
5. In the Pair Operation window tree, select the CU group, CU, port, or host group where the
P-VOL is located.
6. Right-click the pair to be released and click Pairsplit-S.
7. In the Pairsplit-S dialog box, Delete Pair by Force drop-down menu, select one of the following:
•
Yes: The pair will be released even if the primary storage system cannot communicate
with the secondary storage system. This option can be used to free a host waiting for a
response from the primary storage system, thus allowing host operations to continue.
•
No: The pair will be released only if the primary storage system can change pair status
for both P-VOL and S-VOL to SMPL.
When the status of the pair to be released is SMPL, the default setting is Yes and it cannot be
changed. If the status is other than SMPL, the default setting is No.
8. Click Set.
9. Click Apply.
10. Verify that the operation completes successfully (changes to SMPL status).
11. The device identifier for one or both pair volumes changes when the pair is released. Therefore
you should enable host recognition of the volumes, using one of the following methods:
•
Run the device recognition command provided by the operating system on the host.
For more information, see the following table.
•
Reboot the host.
Determined by Device recognition required for
S-VOL •
Both volumes are on P9500
• P-VOL is on XP24000 and S-VOL is on P9500.
P-VOL is on P9500 and S-VOL is on XP24000. P-VOL and S-VOL
Changing Continuous Access Synchronous pairs to ESAM pairs
You can convert a Continuous Access Synchronous pair to an ESAM pair.
Changing Continuous Access Synchronous pairs to ESAM pairs 39