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NOTE:
After the pairsplit, response time of the first I/O to each logical unit (LU) can be up to approximately
five seconds in the worst case. This worst case should be in a one-to-three BC pair situation and 36
LDEV LUSE configuration.
Pair status
The BC remote console software displays the pair status of all BC volumes (LUs) on the specified port of
the connected disk array. The following figure shows the BC pair status transitions and the relationship
between pair status and BC operations.
Figure 14 BC pair status transitions
The following describes BC pair status conditions:
1. IfavolumeisnotassignedtoaBCpair,itsstatusisSMPL.
2. Select the SMPL volumes for the P-VOL and S-VOL to create a BC pair. When you create a BC
pair, the initial copy operation starts. During the initial copy operation, the status of the P-VOL
and S-VOL changes to COPY(PD).
3. When the initial copy operation is complete, the pair status becomes PAIR, and the differential data
between the P-VOL and the S-VOL is copied by the update copy operation.
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Business Copy XP (BC) for the Array