HP XP P9500 Storage - Manual (Page 43)

Status reporting, data currency
The following table explains whose pair status is reported under different combinations of shared
volumes.
•
Continuous Access Synchronous Z pair status is reported to the host if you query the Continuous
Access Synchronous Z M-VOL or R-VOL. To obtain the Business Copy Z pair status, query the
Business Copy Z S-VOL pair.
•
Business Copy Z supports multiple R-VOLs for each of its S-VOLs, but when you issue a pair
status query, the status is returned only for the pair whose R-VOL has the lowest LDEV ID. To
check pair status for the other R-VOLs, direct a host query to the specific R-VOL using the
R-VOL’s LDEV ID in the host command.
Remote Web Console displays the status of all R-VOLs associated with a Business Copy Z
M-VOL.
Table 21 Pair status reporting
Pair status Number of BC Z R-VOLs Number of Cnt
Ac-S Z pairs
Simplex 0 0
Business Copy Z pair status 1 0
Business Copy Z pair status for the R-VOL with lowest LDEV ID 2 or more 0
Continuous Access Synchronous Z pair status 0 1
Continuous Access Synchronous Z pair status 1 1
Continuous Access Synchronous Z pair status 2 or more 1
The following table shows when data is current on a shared Continuous Access Synchronous
Z/Business Copy Z volume based on the pair statuses.
Table 22 Data currency of a shared volume
Business Copy Z pair status Continuous
Access
Suspended Resync Suspended Split Pending Duplex Pending
Duplex Synchronous Z
pair status
Not Current Not Current Current Not Current Not Current Not Current Pending
Duplex
Not Current Not Current Current Not Current Not Current Not Current Duplex
Not Current Current Current Current Current Not Current Suspended
-R-VOL by
operator/
Suspended
Virtual LVI/LUN
Virtual LVI/LUN volumes can be assigned to Continuous Access Synchronous Z pairs, with the
following restrictions:
•
The R-VOL must have the same capacity than the M-VOL.
•
When performing Virtual LVI/LUN operations on an existing Continuous Access Synchronous
Z M-VOL or R-VOL, you must release the pair first to return the volume to Simplex status.
For further information on Virtual LVI/LUN, see the HP P9000 Provisioning for Mainframe Systems
User Guide.
Virtual LVI/LUN 43