HP P9000 Continuous Access Journal for Mainframe Systems User Guide (AV400-96397, October 2011)

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 to change the mode from View to Modify.
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.
Split a pair 71