Restoring a pair of data volumes – HP StorageWorks XP Remote Web Console Software User Manual
Page 165
• Flush: When you split the pair, update data will be copied to the secondary data volume.
When the secondary storage system receives a request for splitting a pair, all the journal data
(i.e., update data) that the pair retains will be written to the secondary data volume. After that, the
status of the pair will change from Suspending to Suspend if the pair does not retain any journal
data for a certain period of time.
• Purge: When you split the pair, update data will not be copied to the secondary data volume.
If you restore the pair later, the update data will be copied to the secondary data volume.
•
Set: Applies the settings to the Preview list in the Pair Operation window
•
Cancel: Discards the settings.
Restoring a Pair of Data Volumes
The Resume Pair window (
on page 166) allows you to restore a pair that has been split. In
addition, the window allows you to recover a mirror and start data copying of URz pair in Hold status in
order to perform delta resync operation.
If the primary or secondary storage system is powered off and its backup batteries are fully discharged
while pairs are suspended, the primary/secondary data volume bitmaps will not be retained. In this
unlikely case, the primary/secondary storage system will mark all cylinders/tracks of all suspended
volumes as modified, so that the primary storage system will perform the equivalent of an entire initial
copy operation when the pairs are resumed.
The administrator of the primary storage system can follow the procedure below to restore one or more
pairs that have been split, or to perform delta resync operation. The administrator of the secondary
storage system cannot perform the following operation.
1.
Ensure that the XP Remote Web Console main window is in Modify mode.
For detailed information about how to do this, please refer to XP Remote Web Console User’s Guide.
2.
Ensure that the Pair Operation window is displayed.
3.
If any pair was suspended due to an error condition (use the Detailed Information window to
view the suspend type), make sure that the error condition has been removed. The primary
storage system will not resume the pair(s) until the error condition has been removed.
4.
In the tree, select a CU image number.
5.
In the list, select and right-click the pair that you want to restore.
The result of this operation differs according to the status of the selected mirror.
• When you select the pair in Suspend status, the split pair will recover.
• When you select the pair in Hold status, delta resync operation will be performed.
• When
you select the pair in Hlde status, the status will change to Hold.
6.
From the pop-up menu, select Resume Pair.
The Resume Pair window appears (
7.
In the Resume Pair window, select the desired options for the pair(s).
8.
Select Set to close the Resume Pair window.
9.
See the Preview list in the Pair Operation window to check the settings that you have made.
• If you want to modify a setting, select and right-click the setting and then select Modify.
• If
you want to cancel a setting, select and right-click the setting and then select Cancel.
10.
Select Apply to restore pair(s).
NOTE:
If an error occurs, the rightmost column of the Preview list displays the error code. To view detailed
information about the error, right-click the error code and then select Error Detail. An error message
appears and gives you detailed information about the error
Hitachi Universal Replicator for z/OS user guide for XP12000/XP10000 Disk Arrays and SVS 200
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