I believe that what I am trying to do is simple:
How to add a node to an HP StoreVirtual Management group (and cluster)?
Basically we got newer VM hosts, and we want to move the nodes to those hosts. The appliances do not allow to be migrated, so we thought on adding new nodes and removing the old ones.
Running the HP StoreVirtual VSA 2014 (v11).
BTW: the "Add Storage Systems" option under the Edit Cluster menu option is disabled. I guess that's root of my issues, but I do not know why.