HP P9000 Continuous Access Synchronous User Guide (AV400-96400, October 2011)

Table 15 Pair status reporting (continued)
Pair statusNumber of BC S-VOLsNumber of Cnt
Ac-S pairs
Continuous Access Synchronous pair status01
Continuous Access Synchronous pair status11
Continuous Access Synchronous pair status2 or more1
The following table indicates when data is current on a shared Continuous Access
Synchronous/Business Copy volume based on the pair statuses.
Table 16 Data currency of a shared volume
Business Copy Pair statusContinuous
Access
PSUECOPY
(RS/RS-R)
PSUSCOPY (SP)PAIRCOPY (PD)
Synchronous
pair status
Not CurrentNot CurrentCurrentNot CurrentNot CurrentNot CurrentCOPY
Not CurrentNot CurrentCurrentNot CurrentNot CurrentNot CurrentPAIR
Not CurrentCurrentCurrentCurrentCurrentNot CurrentPSUS (Delete
pair to
RCU)/PSUE
(pair
suspended-error)
LUN Expansion
LUSE volumes can be assigned to Continuous Access Synchronous pairs, with the following
restrictions:
• The P-VOL and S-VOL must have the same LU type and the same number of LDEVs.
• If you need to perform LUSE operations on an existing Continuous Access Synchronous P-VOL
or S-VOL, you must release the pair first to return the volume to SMPL status.
• If you allocate a LUSE volume that consists of LDEVs set across more than one CU to the
Continuous Access Synchronous pair, you must select CU Free for an RCU.
For further information on LUN Expansion (LUSE), see the HP P9000 Provisioning for Open Systems
User Guide.
Virtual LVI/LUN
to Continuous Access Synchronous pairs, with the following restrictions:
• The S-VOL must have the same capacity as the P-VOL.
• When performing Virtual LVI/LUN operations on an existing Continuous Access Synchronous
P-VOL or S-VOL, you must release the pair first to return the volume to SMPL status.
For more information on Virtual LVI/LUN, see the HP P9000 Provisioning for Open Systems User
Guide.
Cache Residency
Cache Residency volumes can be assigned to Continuous Access Synchronous pairs, and Cache
Residency operations can be performed on Continuous Access Synchronous P-VOLs and S-VOLs.
For more information, see the HP P9000 Cache Manager User Guide.
LUN Expansion 35