HP XP7 Continuous Access Synchronous User Guide (TK911-96004)

Configurations with Business Copy S-VOLs
In the following figure, an BC S-VOL also functions as a Cnt Ac-S P-VOL. This configuration requires
that the BC pair is split before the Cnt Ac-S pair is created.
Figure 5 Shared BC S-VOL with Cnt Ac-S P-VOL
Status reporting and data currency
The following table shows the pair status that is reported for different combinations of shared
volumes.
Pair statusNumber of BC S-VOLsNumber of Cnt
Ac-S pairs
SMPL00
BC pair status10
BC pair status for the S-VOL with lowest LDEV ID2 or more0
Cnt Ac-S pair status01
Cnt Ac-S pair status11
Cnt Ac-S pair status2 or more1
• Cnt Ac-S pair status is reported to the host if you query the Cnt Ac-S P-VOL or S-VOL. To obtain
the BC pair status, query the BC P-VOL pair.
• BC supports multiple S-VOLs for each of its P-VOLs, but when you issue a pair status query,
the status is returned only for the pair whose S-VOL has the lowest LUN. To check pair status
for the other S-VOLs, direct a host query to the specific S-VOL using the S-VOL's LUN in the
host command.
Remote Web Console displays the status of all S-VOLs.
The following table shows when data is current on a shared Cnt Ac-S/BC volume based on the
pair statuses.
BC pair statusCnt Ac-S pair
status
PSUECOPY (RS)/COPY,
COPY(RS-R)/RCPY
PSUSCOPY
(SP)/COPY
PAIRCOPY
(PD)/COPY
Not CurrentNot CurrentCurrentNot CurrentNot
Current
Not CurrentCOPY
Not CurrentNot CurrentCurrentNot CurrentNot
Current
Not CurrentPAIR
Not CurrentCurrentCurrentCurrentCurrentNot CurrentPSUS (Delete
pair to
RCU)/PSUE
(pair
suspended-error)
Business Copy 43