text: **3.6.5 Host zones**
  
  Host must be zoned to the I/O Group to access volumes that are presented by this I/O Group. 
  
  The preferred zoning policy is to create a separate zone for each host HBA port, and place 
  exactly one port from each node in each I/O group that the host accesses in this zone. For 
  deployments with more than 64 hosts defined in the system, this host zoning scheme is 
  mandatory. 
  
  If you plan to use NPIV, see the other host zoning requirements at that available at this 
  website. 
  
  When a dual-core SAN design is used, it is a requirement that no internode communications 
  use the ISL link. When you create host zones in this type of configuration, ensure that each 
  system port in the host zone is attached to the same Fibre Channel switch. 
  
  Consider the following rules for zoning hosts with the Storwize V7000: 
  
  (cid:2) HBA to Storwize V7000 port zones 
  
  Place each host’s HBA in a separate zone with exactly one port from each node in each 
  I/O group that the host accesses. 
  
  It is not prohibited to zone host’s HBA to one port from every node in the cluster, but it 
  does reduce the maximum number of hosts that can be attached to the system. 