HP XP P9500 Storage - Manual (Page 63)

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If the operation fails, the P-VOL nevertheless becomes SMPL. Transfer of differential data to
S-VOL is terminated.
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If you plan to delete all pairs in the journal and then create another pair, be sure to wait at
least one minute after deleting the pairs before creating the new pair.
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Perform pair deletion when write I/O load is low to reduce impact on performance. Operations
on pairs with different status in the same mirror may result in suspension during periods of
heavy write I/O.
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If you delete pairs in PAIR status and other than PAIR status in the same mirror, an unexpected
suspension could occur during the operation under heavy I/O load conditions. You can
estimate whether the I/O load is heavy or not from frequency of host I/Os. This operation
should be performed under light I/O load conditions.
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In a delta resync configuration, if you release the Cnt Ac-S pair, the Cnt Ac-J delta resync pair
is released as well. If you release the Cnt Ac-J pair, the Cnt Ac-J delta resync S-VOL is released.
Procedure 12 To delete pairs
1. In the Remote Web Console main window, select Actions > Remote Copy > Continuous Access
Journal > Pair Operation.
2. Click to change the mode from View to Modify.
3. In the tree, the port or host group for the pair.
4. In the list of associated pairs in the right pane, right-click the pair or pairs that you want to
delete and select Pairsplit-S.
5. In the Pairsplit-S dialog box Range list, select one of the following:
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LU, to delete only the selected pairs.
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Mirror, (default) to delete all pairs in the same mirror as the selected pair.
If you are deleting some pairs in a mirror but not all, you must select LU for each of these
pairs. Do not select Mirror in this case, otherwise an error occurs.
If the pair’s status is SMPL, the Range field is disabled and automatically set to LU. It is
automatically set to Mirror if the pair’s status is Deleting or Suspending.
6. From the Delete Mode list, select one of the following:
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Normal, to delete pairs only if the primary system can change the pair status of both
P-VOL and S-VOL to SMPL.
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Force, to forcibly delete pairs even when the primary system cannot communicate with
the secondary system. If the primary system cannot to communicate with the secondary
system, specifying Force allows host operations to continue.
If you select Force when pair status is other than SMPL, Range is automatically set to
Mirror.
Deleting pairs 63