text: In an IBM Storwize V7000 environment, the use of active/active architecture and the I/O 
  handling for a volume can be managed by both nodes of the I/O group. Therefore, servers 
  that are connected through Fibre Channel connectors*must*use multipath device drivers 
  handle this capability. 
  
  The IBM Storwize V7000 I/O groups are connected to the SAN so that all application servers 
  accessing volumes from the I/O group have access to them. Up to 2048 host server objects 
  can be defined in four I/O groups. 