HP StorageWorks P9000 User Manual page 72

Journal data may not be copied to the S-VOL depending on the option you select.
During normal Continuous Access Journal Z operations, the secondary system rejects write
operations to an S-VOL. However, you can enable write operations to the S-VOL during the
pair split operation. When you do this, then resync the pair, the secondary system sends the
S-VOL track bitmap to the primary system to insure proper resynchronization of the pair. This
S-VOL Write option is described in the pair-split procedure.
To split one or more pairs
1. In Remote Web Console, select Actions > Remote Copy > Continuous Access Journal Z > Pair
Operation.
2. Click
3. In the tree, select a CU group number or CU number. Paired volumes are displayed in the
upper-right-side list area.
4. Select the pair that you want to split, right-click, and select Suspend Pair from the menu. The
dialog box displays.
5. From the S-VOL Write list, select one of the following:
Enable to permit hosts to write data to the S-VOL.
Disable (the default) to prevent hosts from writing to the S-VOL
6. From the Range list, select one of the following:
Volume to split only the selected pair or pairs.
Mirror to split all pairs in the same mirror(s) as the selected pairs
If the following two conditions are satisfied and you select Apply, a warning message
appears and processing cannot continue.
- The Preview list contains two or more pairs belonging to the same mirror.
- The Range column shows Mirror for at least one of the above pairs.
To be able to continue processing, do either of the following:
- Ensure that the Range column shows Volume for all pairs in the same mirror.
- In the Preview list, select one pair in one mirror, and then other pairs in the mirror is
excluded.
7. From the Suspend Mode list, select one of the following:
Flush to cause all uncopied update data to be copied to the S-VOL before the split
operation is completed.
Purge to cause all uncopied update data not to be copied to the S-VOL before the split
operation is completed. When you resynchronize, uncopied update data is then copied
to the S-VOL(s).
8. Click Set when finished.
72 Pair operations
to change the mode from View to Modify.