New tool Sysinternals, disk2vhd!

I am a big fan of sysinternals tools and I use these tools quite often to debug OS related issues. These tools are quite useful when you want to understand internals of OS. Mark and his team has been doing a great job in keeping these tools up to date and adding new features once in a while. One such new tool that got released yesterday is Disk2VHD. You can download it here. Here is how TechNet link decribes this new tool.

Disk2vhd is a utility that creates VHD (Virtual Hard Disk – Microsoft’s Virtual Machine disk format) versions of physical disks for use in Microsoft Virtual PC or Microsoft Hyper-V virtual machines (VMs). The difference between Disk2vhd and other physical-to-virtual tools is that you can run Disk2vhd on a system that’s online. Disk2vhd uses Windows’ Volume Snapshot capability, introduced in Windows XP, to create consistent point-in-time snapshots of the volumes you want to include in a conversion. You can even have Disk2vhd create the VHDs on local volumes, even ones being converted (though performance is better when the VHD is on a disk different than ones being converted)


I downloaded this tool in the morning and experimented a bit on my Windows 7 system. Usage of this tool is straight forward. You see a dialog with all disk partitions as listed in the screen shot here. All you need to do is select all the partitions you want to export to a VHD and click “Create”. The VHD export will take sometime based on the overall disk size you selected. For my experiments, I just selected first two partitions. This is because I have all the BCD information on partition 1 and without that my new VHD will be meaningless. You may see lot of CPU/memory utilization while the export is in progress. On my system, it looked something like this.

Once the export is complete, I rebooted my system in to Windows Server 2008  R2 and created a virtual machine and attached the exported VHD. That is it. My virtual machine is ready with installed OS and all the applications I was running on the physical Windows 7 system.

As I powered on the VM, the first screen showed me the boot menu I usually see on my physical machine. This is because I never removed the additional multi-boot entries I had in the BCD stored on first partition.  This entries — if selected — won’t work because I did not export the partitions containing those OS images to the VHD.


At this point, I continued selecting the Windows 7 entry and started booting OS. Within a few seconds, I could see the user selection screen and after I logged in using my regualr user account, I could see all the applications working as usual. I also have Windows Virtual PC with WinXP mode in the VHD image. But — as I expected — that did not work as it requires hardware assisted virtualization which is something that will not be availble inside a virtual machine.


Comments are closed.