Figure 27 Shared Continuous Access Journal primary volume and secondary volume with
Business Copy primary volumes
Configurations with Business Copy secondary volumes
The following figure shows a Business Copy primary volume used as the production volume. A
remote Continuous Access Journal backup copy is made of the Business Copy secondary volume.
The Business Copy pair must be in PSUS status (Split) to perform the Continuous Access Journal
operation.
Figure 28 Shared Continuous Access Journal secondary volume with Business Copy primary volume
Pair status and data currency
The table below shows whether the data in a shared volume is current, given the combined status.
Table 25 Data currency of a shared volume
Business Copy pair statusContinuous Access
Journal pair status
PSUECOPY
(RS/RS-R)
PSUSCOPY (SP)PAIRCOPY (PD)
Not CurrentNot CurrentCurrentNot CurrentNot CurrentNot CurrentCOPY
Not CurrentNot CurrentCurrentNot CurrentNot CurrentNot CurrentPAIR
Not CurrentCurrentCurrentCurrentCurrentNot CurrentPSUS/PSUE
Check pair status for shared volumes as follows:
• For Continuous Access Journal, check status of the primary volume or secondary volume.
• For Business Copy, check status of the primary volume.
Business Copy supports multiple secondary volumes for each primary volume. When you check
pair status, the system returns status for only one pair—the pair whose secondary volume has the
Configurations with Business Copy secondary volumes 149
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