Using a Boot to VHD file in a Hyper-V Server VM

I have a file win7.vhd that I've been using in a Boot to VHD scenario. Now I want to run that Windows 7 instance within Hyper-V Server alongside a few other VMs I have. I sysprepped win7.vhd and copied it over to the the Hyper-V Server and tried creating a new VM using that .vhd file. I get the "Boot failure. Reboot and Select proper Boot device or Insert Boot Media in selected Boot device" error. Any suggestions?

From serverfault qntmfred

• When you boot (physically) from a VHD, the boot loader and a few other files reside not within the VHD but on the hosting volume, thus the VHD is incomplete when it stands alone (virtually, within a VM.)

  You can probably fix it up by booting the VM from the Windows 7 installation CD and telling it to repair the boot volume.

  qntmfred : i'm not quite sure what you mean by "booting the VM from the Windows 7 installation CD" could you elaborate?

  Jake Oshins : I meant: Attach the Windows 7 DVD (or an ISO file that contains the same thing) to your VM. Configure the VM to boot from the CD. Press the "start" button on the VM.
  From Jake Oshins

• I was able to successfully boot my vhd in Hyper-V Server using the sequence of commands found at http://www.ravichaganti.com/blog/?p=317

  • Boot into a Windows 7 Installation disc. When the wizard begins, open a command prompt by pressing Shift+F10
  • Open Diskpart
  • Select vdisk file=D:\Win7.VHD
  • Attach Vdisk
  • select part 1
  • active
  • Assign letter=Z
  • exit
  • Now, at the command prompt, change to Z:\Windows\System32
  • Run, BCDboot.exe Z:\Windows /s Z:\
  • Run, BCDedit /store Z:\boot\BCD /set {bootmgr} device boot
  • Run, BCDedit /store Z:\boot\BCD /set {default} device boot
  • Run, BCDedit /store Z:\boot\BCD /set {default} osdevice boot
  • Change directory to C:\
  • open Diskpart again and run
  • Select vdisk file=D:\Win7.VHD
  • detach vDISK
  • Exit
  Jake Oshins : It sounds like you set up your VM to boot from a VHD from within the VM. I was suggesting that you make the VHD itself the boot volume of the VM. Either way, you seem to have what you want.
  From qntmfred