Restoring a pair of data volumes – HP StorageWorks XP Remote Web Console Software User Manual
Page 200
•
Suspend Mode: Allows you to specify how to deal with update data that has not been copied
to the secondary data volume. The default is Flush:
◦
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 (that is, 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 (
“Resume Pair Window” (page 201)
) 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 a
Universal Replicator for Mainframe pair in Hold or Holding status in order to perform the delta
resync operation.
NOTE:
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. Note that the administrator of the secondary storage system cannot
perform the following operation, or to perform the delta resync operation.
1.
Ensure that the Remote Web Console main window is in Modify mode.
For detailed information about how to do this, see HP XP24000/XP20000 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 group number or 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 recovers.
•
When you select the pair in Hold or Holding status, the delta resync operation is
performed.
•
When you select the pair in Hlde status, the status changes 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.
Click Set to close the Resume Pair window.
200 Performing Pair Operations