HP has published a guide on how to best deploy Windows Server 2008 Hyper-V on their Blade servers and EVA SAN. Similar to us, they’ve gone with boot from SAN. This turns your host hardware into dumb appliances that can be replaced pretty easily … assuming you’ve used virtual connects to abstract the SAN WWN’s and NIC MAC addresses. In this document HP has used 128GB RAM BL495’s and an EVA 8000. You don’t need to go all out like that. I found that there was a sweet spot sizing the RAM in the servers. 32GB seems pretty good right now. Once you go to 64GB RAM kits the prices get exponentially outrageous and defeat the purpose of virtualisation.