You create a virtual machine (VM) on a Windows Server 2008 R2 Hyper-V server. The VM
has a single VHD file that is connected to an IDE controller. You need to add five new virtual
disks to the VM. You must minimize the amount of virtual hardware. What should you do?
A.
Add the virtual disks to IDE Controller 0.
B.
Add the virtual disks to an existing SCSI controller.
C.
Remove the virtual DVD drive, and add the virtual disks to IDE Controller1.
D.
Add five SCSI controllers to the VM, and add one virtual disk to each SCSI controller.
Explanation:
Use of virtual SCSI devices requires integration services to be installed in the guest
operating system. SCSI devices. Each virtual machine supports up to 256 SCSI disks (four
SCSI controllers with each controller supporting up to 64 disks). SCSI controllers use a type
of device developed specifically for use with virtual machines and use the virtual machine
bus to communicate. The virtual machine bus must be available when the guest operating
system is started. Therefore, virtual hard disks attached to SCSI controllers cannot be used
as startup disks. By default, SCSI commands are filtered in Hyper-V in Windows Server
2008 R2. Although it is possible to disable filtering of SCSI commands, we do not
recommend that you arbitrarily disable filtering because it represents a possible security risk
(when filtering of SCSI commands is turned off, SCSI commands pass directly from the
virtual machine to the storage stack on the management operating system).
Programmatically disabling SCSI filtering is supported in Hyper-V in Windows Server 2008
R2 and may be required for certain storage management applications. You should only
disable SCSI filtering after consulting with your storage vendor and determining that it is
necessary for application compatibility. Although the I/O performance of physical SCSI and
IDE devices can differ significantly, this is not true for the virtualized SCSI and IDE devices
in Hyper-V. Hyper-V. IDE and SCSI devices both offer equally fast I/O performance when
integration services are installed in the guest operating system