Hitachi ShadowImage for IBM z/OS User"s Guide (T5213-96002, June 2007)

5-28 Performing ShadowImage for z/OS Operations Using Storage Navigator
Hitachi ShadowImage™ for IBM
®
z/OS
®
User’s Guide
• The Resync Type drop-down list allows you to select the resync type for
the pairs being resynchronized (from Normal Copy(S->T), Quick
Resync(S->T), Reverse Copy(T->S), or Quick Restore(T->S)). When
you are going to select Reverse Copy(T->S) or Quick Restore(T->S),
make sure that the selected pair meets the following requirements:
Table 5-4 Requirements for Selecting Reverse Copy(T->S) or Quick
Restore(T->S)
Parameter Requirement(s)
Pair status
The specified pair must be in the split state. All other pairs that share the same S-VOL as
the specified pair must also be in the split or suspended state.
Pair type
You cannot perform the quick restore pairresync command on a pair that consists of VLL
and normal volumes.
The specified pair must not be a Cross-OS File Exchange volume pair.
Shared SIz/TCz
volume.
If the SIz and TCz pairs share the same volume (S-VOL = M-VOL, T-VOL = M-VOL, or S-
VOL = R-VOL), and theTCz pair is not in the suspend status, the reverse copy and quick
restore operations cannot be performed.
When the shared SIz/TCz volume is paired with an external volume, the quick restore pairresync
operation cannot be performed.
Shared SIz/URz
volume.
If the SIz and URz pairs share the same volume, and the URz pair is not in the suspend
status, the reverse copy and quick restore operations cannot be performed.
When the shared SIz/URz volume is paired with an external volume, the quick restore pairresync
operation cannot be performed.
Note: During the reverse copy or quick restore operation, a TCz pair nor a
URz pair cannot be created. The TCz add pair command and URz add pair
command will be rejected when the SIz pair status is resync-r.
• The Copy Pace drop-down list allows you to select the copy pace (from
Slower, Medium, or Faster) for all the pairs that you are re-
synchronizing.
Slower minimizes the impact of SIz operations on storage system I/O
performance. Faster quickly completes the copy operation, but it may
affect the storage system I/O performance.
• The OK button adds the operation setting displayed in the Resynchronize
Volume Pair Volume List for re-synchronizing the specified pair(s) to the
Preview List on the Pair Operation window.
Note: You must click Apply on the Pair Operation window to start the
Resync Pair operation for the specified pair(s).
• The Cancel button cancels the operations set in the Resynchronize Volume
Pair dialog box and closes the dialog box.
To resynchronize one or more SIz pairs that have been split or suspended:
1. From the host, set the split T-VOL(s) offline before starting the Resync Pair
operation.
When the Resync Pair operation starts, the storage system will stop
accepting write I/Os to the T-VOL.