To split one or more pairs
1. In Remote Web Console, select Actions > Remote Copy > Continuous Access Journal > Pair
Operation.
2. Click to change the mode from View to Modify.
3. In the tree, select the port or host group. Paired volumes are displayed in the upper-right-side
list area.
4. Select the pair that you want to split, right-click, and select Pairsplit-r 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:
• LU 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 LU 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 :
When you split the pair, update data is copied to the secondary data volume. When the
secondary storage system receives a request for splitting a pair, all the journal data (that
is, update data) that the pair retains is written to the secondary data volume. After that,
the status of the pair changes from Suspending to PSUS if the pair does not retain any
journal data for a certain period of time.
• Purge :
When you split the pair, update data is not copied to the secondary data volume. If you
restore the pair later, the update data is copied to the secondary data volume.
8. Click Set when finished.
58 Pair operations
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