How EMC VNX storage array control access to data
EMC VNX array use Storage Groups to control access to data. A Storage Group is one or more LUNs within the storage array that can be accessed only by the host or hosts that you associate with the array LUNs. A host cannot access or modify data in any array LUNs that are not part of its Storage Group.
ONTAP supports multiple Storage Groups if these rules are followed:
Switch zoning must define which target ports the FC initiator ports on the ONTAP system use to access each array LUN group.
LUN masking must be used to restrict host access to array LUNs.
Storage Groups must define which array LUN groups are presented to each FC initiator port.
One FC initiator port pair on each ONTAP system is required for each array LUN group.
If array LUN neighborhoods are used, the V-Series systems in the same neighborhood must be in the same Storage Group.