HP P9000 Continuous Access Synchronous for Mainframe Systems User Guide (AV400-96398, October 2011)

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 statusNumber of BC Z R-VOLsNumber of Cnt
Ac-S Z pairs
Simplex00
Business Copy Z pair status10
Business Copy Z pair status for the R-VOL with lowest LDEV ID2 or more0
Continuous Access Synchronous Z pair status01
Continuous Access Synchronous Z pair status11
Continuous Access Synchronous Z pair status2 or more1
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 statusContinuous
Access
SuspendedResyncSuspendedSplit PendingDuplexPending
Duplex
Synchronous Z
pair status
Not CurrentNot CurrentCurrentNot CurrentNot CurrentNot CurrentPending
Duplex
Not CurrentNot CurrentCurrentNot CurrentNot CurrentNot CurrentDuplex
Not CurrentCurrentCurrentCurrentCurrentNot CurrentSuspended
-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