Adding and removing volumes in a consistency group
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If you want to change the composition of the consistency group by adding or removing a volume, you must first delete the original relationship and then create the consistency group again with the new composition.
The composition change is not allowed when the consistency group is in the “InSync” state.
The destination volume should be of type DP.
The new volume you add to expand the consistency group must have a pair of common Snapshot copies between the source and destination volumes.
Delete the zero RTO consistency group relationship:
destination::>snapmirror delete -destination-path vs1_dst:/cg/cg_dst
Release the source side SnapMirror relationship and retain common Snapshot copies:
source::>snapmirror release -relationship-info-only true -destination-path vs1_dst:/cg/cg_dst
Create the new consistency group with the new composition:
destination::> snapmirror create -source-path vs1_src:/cg/cg_src -destination-path vs1_dst:/cg/cg_dst -cg-item-mappings vol_src2:@vol_dst2
Resynchronize the zero RTO consistency group relationship to ensure it is in sync:
destination::> snapmirror resync -destination-path vs1_dst:/cg/cg_dst