The vSphere 6 documentation describes how to "Cluster Physical and Virtual Machines" for say MS SQL cluster:
In the sub-section 'Add Hard Disks to the Second Node for a Cluster of Physical and Virtual Machines', it states:
"...expand SCSI controller and select the SCSI Bus Sharing drop-down menu. Set SCSI Bus Sharing to Virtual
and click OK."
(This 'Virtual' setting allows sharing of virtual disks on the same server while 'Physical' setting would allow sharing of vDisks on different servers as well.)
Selecting "Virtual" or "Physical" Bus Sharing makes little sense to me since we are not creating a cluster of two VMs, so there is no sharing of Virtual disks. I will be using RDMs, which will be shared with a physical server. Am I wrong?
Let me add that using RDM seems better (direct and simple) to me than using iSCSI initiator inside the Windows VM, as RDMs bypass the vSwitch. Thanks.