Convert ide bus to virtio in Windows guests on Proxmox

Surprisingly simple to do this:


This is the exact procedure from http://forum.proxmox.com/threads/5248-Is-it-possible-to-convert-to-Virtio:

With "BUS" you mean IDE I suppose. Yes, it's possible, just you could risk that Win2008 ask you for a reactivation (hardware change can trigger it).
Sure on the wiki you find the answer, that is the same way you usually follow when installing as Virtio from the beginning.
In short, shutdown Win2008 and simply add a very small HD (like 1GB) with Virtio type to your Win2008 guest from web interface, and have the cdrom pointing to the ISO with the virtio drivers for kvm (latest and greatests, virtio-win-1.1.11-0.iso at the moment, see http://alt.fedoraproject.org/pub/alt...st/images/bin/).
Boot Win2008 that will detect the new 1GB HD and ask you for drivers. Install them (the ones in P { margin-bottom: 0cm; }'Wlh' dir on the .iso) and shutdown. Remove the additional hd AND your current HD (will be listed beyond as unused HD), and then re-add it picking it from the unused section, but this time with VIRTIO interface. Boot the VM and enjoy!
Of course, I don't take resposability for the success of the above, so do a backup first, just in case...

By the way, we have a VSphere setup here now, I have been messing with it for a week and it is HORRENDOUS by comparison to Proxmox as far as ease of use and administration. The interface is the most unintuitive jumbled unorganized thing I have ever seen. Now I grant you that I am still new at it, but things that are SO obvious on proxmox are either difficult or impossible on VCenter.
There are many different interfaces for doing the same things, some options are allowed some places not others, its really confusing.