–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 8-6 Suspend Pair Window
The Suspend Pair window displays the following:
•
–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.
Note: 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.
Chapter 8 Performing Pair Operations |
