A customer needs a datastore to be seen across multiple vSphere clusters with applications inside
of the virtual machines that must detect the physical characteristics of the storage device.
Which type of virtual disk meets this requirement?
A.
A virtual disk on a VMFS datastore
B.
A raw device mapped disk in virtual compatibility mode
C.
A raw device mapped disk in physical compatibility mode
D.
A virtual disk on an NFS datastore
Explanation:
Physical compatibility mode
Physical mode specifies minimal SCSI virtualization of the mapped device, allowing the greatest flexibility for SAN management software.
VMkernel passes all SCSI commands to the device, with one exception – The REPORT LUNs command is virtualized, so that the VMkernel can isolate the LUN to the owning virtual machine. Otherwise, all physical characteristics of the underlying hardware are exposed.
Virtual compatibility mode
Virtual mode specifies full virtualization of the mapped device.
VMkernel sends only READ and WRITE to the mapped device. The mapped device appears to the guest operating system exactly the same as a virtual disk file in a VMFS volume.
The real hardware characteristics are hidden.
C : A raw device mapped disk in physical compatibility mode
thanks for the explanation yun!