HP XP Continuous Access Software - Manual (Page 89)

Continuous Access XP user guide for the XP1024/XP128 89
• P-VOL: 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.
• P-VOL Fence Level: Fence level.
• Never: Never fence the operation.
• Data: Fence when the MCU cannot successfully execute an update copy operation for any reason.
• Status: Fence only if the MCU cannot change the S-VOL status to the same status as the P-VOL. For
synchronous mode only.
When asynchronous pairs are created, Never is set automatically.
• Initial Copy Parameters:
• Initial Copy Pace (From 1 to 15): Number of tracks for resume copy. The default is 15.
• Priority (From 1 to 256): Priority for resync operation, which determines order in which resync
operations are performed.
• Asynchronous Parameters:
• Resume Range: When Group is selected, resync all split or suspended Continuous Access XP Async
pairs in the same group as the selected pair. When LU is selected, resync only the selected
Continuous Access XP Async pairs.
• Error Level: Error level for the Continuous Access XP Async pairs: Group or LU. This option is
available only when LU is selected for the Resume Range.
For more information about option parameters, see ” Continuous Access XP initial copy and pair options
of the Paircreate pane ” on page 84.
NOTE: If an MCU or RCU is powered off and its backup batteries are fully discharged while Continuous
Access XP pairs are suspended, the P-VOL and S-VOL cylinder bitmaps are not retained. In this unlikely
case, the MCU and RCU mark all cylinders of all split or suspended Continuous Access XP volumes as
modified, so the MCU performs the equivalent of an entire initial copy operation when pairs are
resynced.
1. If any pair was suspended due to an error condition (use the Pairdisplay pane to view suspend type),
ensure that the error condition is removed (see ” Continuous Access XP error codes ” on page 103 for
troubleshooting instructions). The MCU will not resync pairs until the error condition is removed.
2. Connect to the MCU of pairs to be resynced, and start Continuous Access XP.
3. From the CU number/Port Number tree on the Continuous Access XP main pane, click the number of
the correct CU image.
4. If you are resyncing split or suspended LUs, click the pairs on the Volume list on the Continuous Access
XP main pane. Select PSUS or PSUE pairs (not both). Select either Sync or Async pairs (not both). If
you plan to use the Resume Range option, select only one Continuous Access XP Async pair in the
group.
NOTE: Resyncing suspended LDEV pairs within a Continuous Access XP LUSE pair is not
supported.
5. Right-click, and click Pairresync. The Pairresync pane appears.
6. Click the pair options, and click Set to close the Pairresync pane and set parameters. The list changes
to the Pair Settings Parameter list (Pairresync). Ensure that all resync and pair options for each pair are
correct.