HP StorageWorks XP Remote Web Console Software - Manual (Page 199)

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 83 Suspend Pair Window
The Suspend Pair window displays the following settings:
•
S-VOL Write: Allows you to specify whether to permit hosts to write data to the secondary
data volume. The default is Disable (that is, 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 the 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 click 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 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.
Splitting a Pair of Data Volumes 199