text: **Note:**Consider the following rules for creating remote partnerships between the IBM 
  Storwize Family systems and IBM SAN Volume Controller: 
  
  (cid:2) An IBM SAN Volume Controller is always in the replication layer. 
  
  (cid:2) By default, the IBM Storwize systems are in the storage layer, but can be changed to 
  the replication layer. 
  
  (cid:2) A system can form partnerships only with systems in the same layer. 
  
  (cid:2) Starting in V6.4, an Storwize V7000 or IBM SAN Volume Controller system in the 
  replication layer can virtualize an IBM Storwize system in the storage layer. 