We are setting up a Microsoft Cluster across two physical hosts in vSphere 5. In order for both VMs to be able to access the shared storage, we have to create an RDM and assign it a unique SCSI controller. I noticed that there are only four SCSI controllers (labeled 0, 1, 2, 3). SCSI controller 0:0 is being used by the host OS.
Does this mean that we can only have 3 RDMs in our cluster? (1:0, 2:0, 3:0) One of those is being used by the quorum disk, so that leaves 2 available for actual data LUNs? Is this correct?