If the process is being driven from FreeNAS, how would you even know which hypervisor is currently hosting the VM?
p.s. it's VAAI.
In the 9.3 WebGUI you ahve to provide the ESXi server, the datastore, and the matching iSCSI device so that FreeNAS can make everything work.
Yeah. VAAI is proper. I'm half asleep today (I'm going to bed in a few minutes because I got no sleep last night... family emergency).