Hitachi ShadowImage for z/OS user guide (HIT9503-96009, January 2008)

a. Make sure that the S VOL and T VOL have the same RAID level and HDD type before

performing the quick restore operation. If you want to restore the original RAID levels after

quick restore, stop host I/Os to the pair, split the pair, perform the quick restore operation

for that pair again, and then restart the host I/Os to the pair.

b. Because the Cache Residency Manager for z/OS settings are exchanged during a quick

restore operation, you must perform one of the two following operations. If you do not, the

change of location of the cache residence areas may cause I/O performance to the Cache

Residency Manager for z/OS data to be down:

• Set the same Cache Residency Manager for z/OS settings (locations) for the S VOL

and T VOL before performing the quick restore operation.

• Release the Cache Residency Manager for z/OS settings of the S VOL and T VOL

before the quick restore operation, and then reset the Cache Residency Manager for

z/OS settings of the S VOL and T VOL after the pair changes to duplex status as a result

of the quick restore operation.

NOTE:

If you do not want to re-synchronize the S-VOL and T-VOL after the quick

restore operation, you must set the Swap & Freeze option before performing the

quick restore operation (see sections “Swap&Freeze Option” on page 38 and

“Setting Hitachi ShadowImage for z/OS Options” on page 93).

5. Click the OK button to reﬂectthesettingstothePresetListontheSizmainwindow.

NOTE:

If you try to perform the quick restore operation to the pair you selected from the Pairresync Volume

List that is (composed of volumes stored in multiple cache logical partitions (CLPRs)), a message

appears asking whether you want to continue the operation. Click the OK button if you do, or click

the Cancel button if you want to discontinue the quick restore operation.

6. Repeat steps (4) through (5) until the Preset List on the Siz main window displays the desired

pairs (settings). Make sure to set the T-VOL(s) ofﬂinebeforestartingresyncoperations.

7. On the Siz main window, click the Apply button to re-synchronize the speciﬁed pair(s). The Siz

main

window then displays the result(s) of the Resync Pair operation(s) (i.e., pair status changed

to re

sync, resync-R, or duplex) and the progress (%) of the update copy operation. The pair status

cha

nges to duplex immediately, if the update copy operation is not necessary.

8. ClicktheRefreshbutton(

) on the Remote Web Console main window to monitor the

progress of the pair copy operation(s).

Suspending Hitachi ShadowImage™ for z/OS Pairs

The Suspend Volume Pair dialog box (seeFigure 38 on page 86) displays pair information for the pair(s)

selected on the Siz main window and allows you to suspend the pair(s). To open the Suspend Volume

ir dialog box, select one or more pairs in the Volume List box on the Siz main window, right-click the

selected pair(s) to display the pop-up menu, and then click the Suspend Pair command

NOTE:

The CSUSPEND/PPRCOPY SUSPEND commands execute a Siz split operation. There is no TSO/ICKDSF

mmand equivalent for manually suspending pairs. See Chapter 5 on page 99 for further information

on using PPRC commands.

Hitachi ShadowImage for z/OS user guide