HP StorageWorks XP24000 User Manual page 21

Figure 8 ShadowImage for Mainframe Pair Status Transitions
If a volume is not assigned to an SIz pair, its status is simplex.
1. Select the simplex volumes for S-VOL and T-VOL to create an SIz pair. When you create an
SIz pair, the initial copy operation starts. During the initial copy operation, the status of the
S-VOL and T-VOL changes to pending.
2. When the initial copy operation is complete, the pair status becomes duplex. When the initial
copy is completed, the differential data between the S-VOL and the T-VOL will be copied by
the update copy.
3. There are two kinds of pair status (split and suspend) when the pair is not synchronized.
When you split a pair (pairsplit), the pair status changes to split.
During the pairsplit process, the pair status becomes SP-pending. Note that if you specify
Quick Split pairsplit, the pair status becomes V-Split during the process. When the split
Pair Status 21