HP XP7 Storage - Manual (Page 139)

Figure 22 Shared Cnt Ac-J volumes with BC primary volumes
Configurations with Business Copy secondary volumes
The following figure shows a BC primary volume used as the production volume. A remote Cnt
Ac-J backup copy is made of the BC secondary volume. The BC pair must be in PSUS status to
perform the Cnt Ac-J operation.
Figure 23 Shared Cnt Ac-J P-VOL with BC secondary volume
Pair status and data currency
The table below shows whether the data in a shared volume is current, given the combined status.
BC pair status Cnt Ac-J pair
status
PSUE COPY(RS/COPY,
COPY(RS-R)/COPY PSUS COPY(SP)/COPY PAIR COPY(PD)/COPY
Not Current Not Current Current Not Current Not Current Not Current COPY
Not Current Not Current Current Not Current Not Current Not Current PAIR
Not Current Current Current Current Current Not Current PSUS/PSUE
Check pair status for shared volumes as follows:
•
For Cnt Ac-J, check status of the primary volume or secondary volume.
•
For BC, check status of the primary volume.
BC 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 lowest LDEV
ID. To see status for the pairs with a different secondary volume, direct a host query to the specific
secondary volume using the secondary volume’s LDEV ID in the host command.
Configurations with Business Copy secondary volumes 139