28 Business Copy XP (BC) for the XP10000/XP12000
NOTE: When a reverse or quick restore pairresync operation is in progress, you cannot perform
paircreate, pairsplit, or pairresync operations for any other pairs sharing the same P-VOL (pairsplit-S and
pairsplit-E are allowed).
Figure 6 BC P-VOL forming pair with Continuous Access XP S-VOL and external S-VOL, respectively
Figure 7 BC P-VOL forming pair with external S-VOL and shared as Continuous Access XP S-VOL
Figure 8 BC S-VOL forming pair with external P-VOL and shared as Continuous Access XP P-VOL
Figure 9 BC P-VOL forming pair with Continuous Access XP Journal S-VOL and External S-VOL, respectively
Figure 10 BC P-VOL forming pair with external S-VOL and shared as Continuous Access XP Journal S-VOL
Use the Pairresync window (see ”Resynchronizing BC pairs (Pairresync)” on page 67) to resynchronize split
and suspended BC pairs. When the pairresync operation starts, the pair status changes to COPY(RS) or
COPY(RS-R). When the pairresync is complete, the pair status changes to PAIR. The disk array resumes BC
update copy operations after the pair status changes to PAIR. The P-VOL remains fully accessible during a
normal pairresync operation, but becomes inaccessible to all hosts during a reverse or quick restore
pairresync operation. This ensures that data on the P-VOL is identical to data on the S-VOL when the
reverse or quick restore pairresync operation completes.
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