Hi, is it possible to perform an inplace upgrade of win 2008 R2 hyper-v host to win 2012 hyper-v server?

The upgrade path is supported.

http://technet.microsoft.com/en-us/library/jj134246.aspx

but I would ask them over on handling the guests during migration / upgrade.

http://social.technet.microsoft.com/Forums/windowsserver/en-US/home?forum=winserverhyperv

 

 

 

I've successfully upgraded two of my 2008R2 core Hyper-V servers to 2012 Standard Core with absolutely no issues.  I've never been a fan of inplace upgrades, but sometimes it's the only choice we have.  

Are your VMs on the system drive?  Is there anyway you can do a fresh install and import your VMs afterwards?

Hi,

Thanks for your posting in Windows Server Forum.

Kindly refer beneath article for in-place upgrade from server 2008 R2 to server 2012.

1. In-place Upgrade from Windows Server 2008 R2 to Windows Server 2012
2. Step-by-Step: Migrating to FREE Microsoft Hyper-V 2012 Servers AND Clusters from 2008 R2 and VMware

Hope it helps!

Thanks,
Dharmesh

Hi thanks. I  apologize, I was  referring to Win Server 2008 R2 to Win Server 2012 Hyper-V. Not 2008 R2 Core to 2012 Core but full blown 2008 R2 to 2012 Hyper-V core (the free one).  

Hi,

Do you need any other assistance?

Thanks,
Dharmesh