Jump to content
RESET Forums (homeservershow.com)

Passthrough disk on same drive as OS in VM?

Sorta Oldguy

Recommended Posts

Built a server with 4 1.5TB drives using the Intel Raid on board to give me 2 2TB Volumes. After various trials to get used to running WHS2011 in a VM under Windows Server 2008R2 I think I have the hang of it mostly, but have run into a problem.


Since the board I am using only has 6 SATA ports and I've stretched the budget a bit to put together what I have, I decided to try installing Windows Server 2008 on one of the Raid Volumes in a 200GB partition to leave room for WHS, Win7 and whatever virtualized. This gives me one extra port for a drive with miscellaneous stuff, like the install ISO's plus another port for a hot swappable drive bay for backups. The Server 2008 install went OK after finding the answers to some gotchas (will post those later for others after I have all this working). If this is too confusing, I suppose I can upload a picture of the drive layout.


I then installed WHS2011 under Hyper-V. No real problem there. The problem is setting up drives for the WHS VM. It appears that to have a pass through disk you need to take the disk offline. I don't have a problem taking the unused raid volume offline and then attaching it to the WHS VM to use as a pass through drive with 2TB space. The trouble is that I have another 1.8TB left on the volume where I lopped off the 200GB for the OS installation. The only option appears to be to take the whole disk offline, which I suppose would screw up the running of Windows Server 2008.


Am I forced to create a VHD on the remaining space, assuming that is possible? Is there another way around this? If I want to use that RAID volume where I now have the OS partition as a pass through drive, do I have to install the OS's on a disk separate from the ones I intend to use as storage?



Link to comment
Share on other sites

Guest no-control

No you pretty much have it figured out. That is the limitation of that configuration.


You have no other options either VHD the remaining space then add it as a HDD to WHS. Other option is to use another disk for the host OS and VM's then pass through the drives.

Link to comment
Share on other sites

Thanks. I did a bit of checking on whether anyone had compared benchmarks for VHD's v. Passthrough. There were some old one's for an SQL server. Think I might waste some time doing that, although I suppose I have to go with the VHD option anyway.


I have to admit I was impressed with how relatively easy setting up Server 2008 and Hyper-V were, other than a couple of gotchs related more to the Intel Raid software than the Server itself.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Create New...