Resuming Continuous Access Xp Volume Pairs (Pairresync); Pair Settings Parameter List (Pairsplit - HP StorageWorks XP12000 User Manual

8. From the Continuous Access XP main pane, verify that Continuous Access XP pairs are displayed
correctly (PSUS status) in the Volume list. Use the Pairresync command (see
Access XP volume pairs
CAUTION:
If a timeout error occurs when the Use Time-Saving Mode option is selected, access the Continuous
Access XP main pane, and confirm the volumes on which the pairsplit-r operation could not be performed.
Deselect the Use Time-Saving Mode option for failed volumes, and retry the pairsplit-r operation.
When the Pairsplit-r pane closes, the list changes to the Pair Settings Parameter list (Pairsplit-r).
Figure 52 Pair Settings Parameter list (Pairsplit-r)
The Pair Settings Parameter list (Pairsplit-r) displays the following information for selected pairs:
• Port, Group (TID), and LUN of the LU in the connected disk array.
• S/N and SSID of the RCU (MCU if connected to the RCU).
• S-VOL Wrt: Disable or enable. Enable means the S-VOL is available to receive read and write
I/Os.
• Kind: S-VOL or P-VOL Failure. Type of suspend operation.
• Range: Split pairs in what measure: Group or LU (Async only).
• Mode: Drain or purge pairsplit-r option (Async only).

Resuming Continuous Access XP volume pairs (Pairresync)

While a Continuous Access XP pair is split or suspended, the MCU does not perform update copy
operations to the S-VOL.
• For a split/suspended Continuous Access XP Synchronous pair, the MCU may or may not
continue accepting write I/Os for the P-VOL, depending on the P-VOL fence level and pairsplit
options (if user-requested) (see
Splitting Continuous Access XP pairs
• For a split/suspended Continuous Access XP Async pair, the MCU and RCU tracks recordsets
discarded during pairsplit/suspension, and the MCU continues accepting write I/Os for the
P-VOL. The MCU tracks P-VOL cylinders updated while the pair is split/suspended.
If the RCU accepts write I/Os for a split S-VOL (S-VOL write enable), the RCU also tracks S-VOL cylinders
updated. When the split/suspended pair is resumed, the MCU merges the P-VOL and S-VOL cylinder
bitmaps to determine out-of-sync cylinders.
Use the Pairresync command to resume split/suspended Continuous Access XP pairs. When the
Pairresync command is selected, the Pairresync pane appears. Use the Pairresync pane to change pair
options, and select the resync range option (asynchronous) for selected pairs.
NOTE:
Resyncing suspended LDEV pairs within a Continuous Access XP LUSE pair is not supported.
1 10
Continuous Access XP for the Array
(Pairresync)) to resync split Continuous Access XP volume pairs.
Creating Continuous Access XP volume pairs (Paircreate)
(Pairsplit-r)).
Resuming Continuous
and