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6-22 Chapter 6 Configuring Journal Groups
Hitachi Universal Replicator for IBM /OS User’s Guide
Splitting a Mirror (Suspending a copy operation)
A mirror is a combination of a master journal group and a restore journal
group. If you split a mirror, the copying of data from the master journal group
to the restore journal group will suspended.
To split a mirror, follow the procedure below. Not only the primary storage
system administrator but also the secondary storage system administrator can
perform this operation:
1. Ensure that the Storage Navigator main window is in Modify mode.
For detailed information about how to do this, please refer to Storage
Navigator User’s Guide.
2. Ensure that the Journal Operation window is displayed (see section
Journal
Operation Window).
3. Do either of the following:
– In the tree, select a master journal group ( ) or a restore journal group
(
) from below Registered.
– In the tree, select Subsystem or Registered and then select a master
journal group (
) or a restore journal group ( ) from the list to the right.
The list displays a list of mirrors. One row in the list represents one mirror.
4. Locate mirrors that are in Active status.
5. From the mirrors, select and right-click the mirror(s) that you want to split.
6. From the pop-up menu, select JNL Groups and Suspend Pair.
7. In the Suspend Pair window (
Figure 6-6), specify parameters and then
select Set.
8. See the Preview list to check the mirrors that you want to split.
– If you want to modify parameters of a mirror, select and right-click the
mirror and then select Modify.
– If you want to cancel splitting a mirror, select and right-click the mirror
and then select Cancel.
– If necessary, you can repeat steps 3 to 8 to specify other mirrors.
9. Select Apply to split the mirror(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.