HP XP P9500 Storage - Manual (Page 35)

Table 15 Pair status reporting (continued)
Pair status Number of BC S-VOLs Number of Cnt
Ac-S pairs
Continuous Access Synchronous pair status 0 1
Continuous Access Synchronous pair status 1 1
Continuous Access Synchronous pair status 2 or more 1
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 status Continuous
Access
PSUE COPY
(RS/RS-R) PSUS COPY (SP) PAIR COPY (PD)
Synchronous
pair status
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 (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