text: **11.6.7 Metro Mirror features**
  
  The IBM Spectrum Virtualize Metro Mirror function supports the following features: 
  
  (cid:2) Synchronous remote copy of volumes that are dispersed over metropolitan distances. 
  
  (cid:2) The Metro Mirror relationships between volume pairs, with each volume in a pair that is 
  managed by a Storwize V7000 system or IBM SAN Volume Controller system (requires 
  V6.3.0 or later). 
  
  (cid:2) Supports intracluster Metro Mirror where both volumes belong to the same system (and 
  I/O Group). 
  
  (cid:2) IBM Spectrum Virtualize supports intercluster Metro Mirror where each volume belongs to 
  a separate system. You can configure a specific system for partnership with another 
  system. All intercluster Metro Mirror processing occurs between two IBM Spectrum 
  Virtualize systems that are configured in a partnership. 
  
  (cid:2) Intercluster and intracluster Metro Mirror can be used concurrently. 
  
  (cid:2) IBM Spectrum Virtualize does not require that a control network or fabric is installed to 
  manage Metro Mirror. For intercluster Metro Mirror, the system maintains a control link 
  between two systems. This control link is used to control the state and coordinate updates 
  at either end. The control link is implemented on top of the same FC fabric connection that 
  the system uses for Metro Mirror I/O. 