NetApp
7-mode/HA pair/V-Series : LUNs : Understanding LUNs : Guidelines for mapping LUNs to igroups : VMware RDM

VMware RDM
When you perform Raw Device Mapping (RDM) on VMware, the operating system type of the LUN must be the operating system type of the guest operating system.
Parent Topic: Guidelines for mapping LUNs to igroups