Preserving Hyper-V virtual machines during operating system re-install
Posted on 2015-02-11
I've inherited a Hyper-V 2008 Server ( no GUI) which has two partitions. The C: partition contains the host OS and the VHD for the site's DC/main server. The F: partition contains two other VHDs for servers running Exchange and some application software. Because of space limitations the DC virtual disk can't be moved off the system partition.
We want to upgrade the system to Server 2012 Standard Edition i.e. with a GUI. As I understand it, there is no support for an in-place upgrade between 2008 Hyper-V server and 2012 Standard.
So, we have to do a fresh OS install. I am hoping to do a 2012 custom installation and install the new OS onto the existing partition i.e. not formatting it and thus preserving the VHD that is already there.
Before we crack on with this I'd be grateful if someone could confirm that what I'm suggesting is actually valid. Also, assuming it is, what happens to the 2008 OS files? Are they simply renamed to Windows.old?