HP StorageWorks XP Remote Web Console Software - Manual (Page 123)

Continuous Access XP Journal user guide 123
NOTE: If a pair is deleted, the deletion might take effect on the secondary data volume later than it takes
effect on the primary data volume. Therefore, an error might occur if you reference a pair’s status or
manipulate a pair immediately after RAID Manager deletes the pair. If such an error occurs, check the
secondary data volume’s status and retry referencing the pair status or manipulating the pair.
Figure 58 Pairsplit-S pane
The Pairsplit-S pane displays the following:
• Range: Specify the delete range. If you select two or more pairs in the same consistency group, the
default is LU. Otherwise, the default is Group.
• LU: Only the specified pairs are deleted. If the pair status is SMPL, Range is set to LU.
NOTE: If you select pairs with PAIR status and other than PAIR status in the same consistency
group, an unexpected suspension might occur during the pair operations (Pairsplit-r, Pairsplit-S, and
Pairresync) under heavy I/O load conditions. You can estimate whether the I/O load is heavy or
not from the rate of journal cache (around 30%), or if you cannot see the journal cache rate from
the frequency of host I/O. The pair operations should be performed under light I/O load
conditions.
• Group: All pairs in the same consistency groups as the selected pairs are deleted. If the pair status
is Deleting or Suspending, Range is set to Group.
CAUTION: Do not use this option when deleting pairs at the secondary disk array during disaster
recovery.
NOTE: If the following two conditions are satisfied and you click Apply, a warning message is
displayed and processing cannot continue:
• The Preset list contains two or more pairs belonging to the same consistency group.
• The Range column displays Group for at least one of the above pairs.
To continue processing, do one of the following:
• Ensure that the Range column displays LU for all pairs in the same consistency group.
• In the Preset list, select all but one pair in the same consistency group, right click the selected
pairs, and select Delete.
• Delete Mode: Specify whether pairs are forcibly deleted. When the status of the pairs to be deleted is
SMPL or Deleting, the default is Force. Otherwise, the default is Normal.
• Force: Pairs are forcibly deleted even if the primary disk array cannot communicate with the
secondary disk array. Use this to free a host waiting for device-end from a primary disk array that
cannot communicate with its the secondary disk array, allowing host operations to continue.
If you specify Force when the pair status is other than SMPL, Range is set to Group.
• Normal: Pairs are deleted only if the primary disk array can change the pair status of the primary
and secondary volumes to SMPL.