When creating an MSCS Cluster across 2 ESX 4 Hosts, what type of Virtual Disks can be
used?

A.
Raw Device Mapped (RDM) disks in Physical or Virtual Compatibility Mode, or
virtual disks on a shared VMFS datastore

B.
Raw Device Mapped (RDM) disks in Virtual Compatibility Mode only

C.
Raw Device Mapped (RDM) disks in Physical or Virtual Compatibility Mode

D.
Raw Device Mapped (RDM) disks in Physical Compatibility Mode only

Explanation:
Setup for Failover Clustering and Microsoft Cluster Service ESX 4.0 ESXi 4.0 vCenter
Server 4.0, page 19.
You can create a MSCS cluster that consists of two virtual machines on two ESX/ESXi
hosts.
Prerequisites
A cluster across physical hosts requires specific hardware and software.
ESX/ESXi hosts that have the following:
Two physical network adapters dedicated to the MSCS cluster and to the public and
private networks.
One physical network adapter dedicated to the service console (ESX hosts) or the
VMkernel (ESXi hosts).
Fibre Channel (FC) SAN. Shared storage must be on an FC SAN.
RDM in physical compatibility (pass-through) or virtual compatibility
(non-pass-through) mode. Vmware recommends physical compatibility mode. The
cluster cannot use virtual disks for shared storage.