HP StorageWorks XP Remote Web Console Software - Manual (Page 164)

10. In the list of the Pair Operations window, verify that the pair has been split successfully. If the
pair has been split, the status of the pair is Suspend.
NOTE:
To restore a pair that has already been split, use the Resume Pair command.
In either of the following conditions, the secondary data volume may become suspended due
to a failure:
• You split a pair when the primary data volume is reserved by a mainframe host.
• The primary data volume becomes reserved when you split the pair.
If the secondary data volume is suspended due to a failure, you can restore the pair by using
the Resume Pair command.
Figure 68 Suspend Pair Window
The Suspend Pair window displays the following:
• S-VOL Write: Allows you to specify whether to permit hosts to write data to the secondary data
volume. The default is Disable (i.e., do not permit):
• Disable: Hosts cannot write data to the secondary data volume while the pair is split.
• Enable: Hosts can write data to the secondary data volume while the pair is split. This option
is available only when the selected volume is a primary data volume.
• Range: Allows you to specify the split range. The default is Volume if two or more pairs in the
same mirror are selected. The default is Group if not.
• Volume: Only the specified pair(s) will be split.
NOTE:
If you select pairs with Duplex status and other than Duplex status in the same mirror, an
unexpected suspension may occur during the pair operations (Suspend Pair, Delete(release) Pair,
and Resume Pair) under heavy I/O load conditions. You can estimate whether the I/O load is
heavy or not from frequency of host I/Os. The suspend pair operations should be performed
under light I/O load conditions.
• Group: All pairs in the same mirror(s) as the selected pair(s) will be split.
If the following two conditions are satisfied and you select Apply, a warning message will be
displayed and processing cannot be continued:
• The
Preview list contains two or more pairs belonging to the same mirror.
• The Range column displays Group for at least one of the above pairs.
To be able to continue processing, do either of the following:
• Ensure that the Range column displays Volume for all pairs in the same mirror.
• In the Preview list, select all but one pair in the same mirror, right click the selected pairs, and
then select Delete.
• 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:
164 Performing URz Pair Operations