How many of you have ever tried migration between different virtualization platform. Learning could be a fun , I realized after doing such nasty things.  I tried few ,those are VMware ESXi, Windows Hyper-v ,Oracle Virtual Box. You can try all as they are either free or free for a limited time period.
Its a way long back when I was using Virtual Box and tried migrating one of the Windows 7 VM to Hyper-V . Since the VM was working fine on Virtual Box so thought whatever be the method used i will get a perfectly running VM on my Hyper-V environment.
To some extent I was correct VM booted up but was contineously rebooting.

As a basic troubleshooting method tried to disable “Disable Automatic restart on system failure” . Which will show you the error on the screen if there will be any.

Disable-automatic-restart-system-failure

Disable-automatic-restart-system-failure

BSOD 0x7B

BSOD 0x7B

 

Wow !! BSOD [Blue screen of Death]  0x7B INACCESSIBLE_BOOT_DEVICE

Most of the people know that there is a hidden message on every BSOD. The BSOD which I received was an expected and known one as well you will face most of the time due to hardware changes ,the dreaded 0x7B

There are various reasons to get 0x7B BSOD , here I am talking about a very specific one which is storage controller.

What kind of disk you are using ? Is it ATAPI, ISCSI or IDE ?

 

My Virtual Box VM was using IDE disk controller while in Hyper-v I was using ISCSI , also no major change even I tried using the same machine . Dont worry , I enabled role of Hyper-V on my machine and installed Virtual Box on the same machine.

So one of the major confusion is clear , its nothing related to hardware change.

While troubleshooting , I found one of the major difference. One of the services was in disabled state “IntelIde” .

Intelide-disable

Intelide-disable

As soon as I changed the Value to ” 0 ” . It started booting up.

Only problem you might face is , How to get registry out from the boot disk ?

Attach VHD

Attach VHD

 

 

Answer is very simple , Convert the default disk into VHD format using the Virutal Media Manager.  And attach the VHD to the machine via disk management as shown.

 

Once you have attached the VHD, make it online and you will be able to view  the content , you may load hive to make the changes as desired.