text: **2.5.6 Clustered system**
  
  A clustered system consists of 1 - 4 pairs of nodes. All configuration, monitoring, and service 
  tasks are performed at the system level, and the configuration settings are replicated across 
  all node canisters in the clustered system. To facilitate these tasks, one or two management 
  IP addresses are set for the system. 
  
  A process is provided to back up the system configuration data to disk so that the clustered 
  system can be restored if a disaster occurs. This method does not back up application data, 
  only the IBM Storwize V7000 system configuration information. 