Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I've searched this site and google, and I CAN find information about how to back up Hyper-V virtual machines by using Windows Server Backup from the Hyper-V host in Windows Server 2008. You have to set up a registry key to enable the Hyper-V VSS writer, and then you can take online backups of your VMs.

However, all the information I have found is about a year old, and none of it has been updated for Windows Server 2008 R2.

I tried to run the "FixIt" .msi found here:

... but it said that it was not applicable to my operating system. So I am thinking either Windows Server 2008 R2 already has its VSS service for Hyper-V enabled, or it still needs to be enabled but the FixIt package doesn't feel comfortable operating on an OS that wasn't RTM at the time.

I went ahead and scheduled a windows server backup for 9pm tomorrow. It said it would take 86 GB, which means it MUST be counting those VMs. But will this backup fail?

Can anyone confirm whether you have to apply the same registry changes for R2?

share|improve this question
up vote 2 down vote accepted

It appears that a Windows Server 2008 R2 Hyper-V Host can back itself and all its Hyper-V machines up right out of the box. The shadow copy service appears capable without any additional help.

share|improve this answer

If you can't get that method to work you can run the server2008 backup from inside the VM's as a batch file. Not really answering the question specifically but will do the trick.

share|improve this answer
Thanks, Matt. I did actually get this solved a while back but forgot to update it. – Chris May 23 '10 at 15:59

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.