HyperVoria | How Are My VHD’s/Passthough Disk’s Connected To My Virtual Machine?

Posted by Kenneth van Surksum on on February 23 2009, 11:16 AM with no comments

Taylor Brown: This is a follow up on my previous post on Hyper-V WMI: What VHD’s/Physical Disks Are Associated With a Virtual Machine?.  I had been getting questions about how to better identify what disks are connected to what bus location/controller.  Specifically I have been getting a lot of questions about how back up or copy just the VHD that the guest sees as drive letter C or D etc… I wrote a revised script that gives a bit more information specifically the controller addresses and the Instance ID of the controller.  The reason that’s interesting is that you can determine that the C volume is on Disk Number 1 and that Disk Number 1 is connected to IDE Port 0/1 and on the parent you know that IDE Port 0/1 is backed by S:\vhds\foo.vhd well then you know what to backup…  So what about SCSI controller’s?  Well they are a bit more challenging but not to much – if you look at the PNP ID of the controller its VMBUS\<GUID> where the GUID is the same as the first GUID in the WMI instance id for the controller on the management OS.