Filter
Top Products
Chapter 4 Functions of ReplicationControl
176
(3) Forced Unpair (-force)
If the regular unpairing becomes impossible due to a failure occurred in the connections between
disk arrays and the like, it is possible to perform Forced unpair for MV and RV individually by
specifying the -force option.
You can specify one of the following as a Forced Unpair target.
y Perform Forced Unpair for both MV and RV. (-force all)
y Perform Forced Unpair only for MV. (-force mv)
y Perform Forced Unpair only for RV. (-force rv)
Note the following when performing Forced Unpair.
y When MV and RV are in the same system, execute the “all” specification.
y When MV and RV are in different systems, use Forced Unpair by specifying MV or RV.
y When performing Forced Unpair by using MV specification (or RV specification), after
removing the cause of the failure, you must perform Forced Unpair for the other volume.
y If Forced Unpair is performed for either MV or RV, subsequent replication operations will not
function properly because inconsistency occurs in the recognized states of MV and RV.
[Displayed Information]
When the pair setting and unpairing has been successfully performed by the iSMrc_pair command, the
following message appears.
iSM13247: Command has completed successfully. (code=pppp-xxxx-xxxx-xxxx)
Description
pppp: Process number
xxxx: Detailed information (code value for maintenance)
[Execution Conditions]
To set or unpair, the following conditions must be satisfied:
(i) The target MV or RV is registered in the volume list.
(ii) The disk array where the specified MV and RV are stored is not in the Freeze state.
(iii) When setting a pair, the MV’s and RV’s logical disk capacity and OS type must coincide.
(iv) The RV to be set as a pair should not be paired with another volume.
(v) To release a pair, the target MV and RV are set as a pair.
(vi) To release a pair, the operational state of the target pair is the Separated state.
(vii) Logical disks are not registered in the reservation group.
(viii) A volume is not the link-volume (LV) of the snapshot function.
(ix) A volume is not the snapshot-volume (SV) and snapshot data volume (SDV) of the snapshot
function.
(x) The base-volume (BV) of the snapshot function is not used as RV.