text: IBM Spectrum Virtualize provides intracluster and intercluster Metro Mirror. 
  
  **Intracluster Metro Mirror**
  Intracluster Metro Mirror performs the intracluster copying of a volume, in which both volumes 
  belong to the same system and I/O Group within the system. Because it is within the same 
  I/O Group, there must be sufficient bitmap space within the I/O Group for both sets of volumes 
  and licensing on the system. 
  
  **Important:**Performing Metro Mirror across I/O Groups within a system is not supported. 
  
  **Intercluster Metro Mirror**
  Intercluster Metro Mirror performs intercluster copying of a volume, in which one volume 
  belongs to a system and the other volume belongs to a separate system. 
  
  Two IBM Spectrum Virtualize systems must be defined in a partnership, which must be 
  performed on both systems to establish a fully functional Metro Mirror partnership. 
  
  By using standard single-mode connections, the supported distance between two systems in 
  a Metro Mirror partnership is 10 km (6.2 miles), although greater distances can be achieved 
  by using extenders. For extended distance solutions, contact your IBM representative. 
  
  **Limit:**When a local fabric and a remote fabric are connected for Metro Mirror purposes, 
  the inter-switch link (ISL) hop count between a local node and a remote node cannot 
  exceed seven. 