Long story short... I've got about 15 bare metal Windows servers, all fully licensed 2012 R2 Standard. Recently, some late model HP DL360 hardware came into my lap. I'm wondering if I can virtualise all these older servers on this hardware, at minimal cost. If I install the free Hyper-V server on 3 of these new servers, can I then purchase System Center Datacenter (US$3600), install it on a fourth server running 2012 R2, and manage unlimited VMs on the hyper-v hosts, and get fail-over clustering, live migration etc? I have a very beefy HA NAS here - 50TB, SSD cache, dual 10GbE. Thinking of using this as cluster storage. Storage utilisation is fairly low...the workload is mainly CPU.