I’ve been asked to install Proxmox VE 3.0 on a new server having a Intel RSTe raid controller. Unfortunately this raid controller is not well supported under linux and even if properly configured, when I tried to install Proxmox VE 3.0 from the provided ISO image I could not see the RAID disk but I was seeing the two separate disks.
After some search I found this good HowTo from Dominic Pratt (http://dominicpratt.de/proxmox-ve-3-0-software-raid/). It is in German, I translated with google and after some issues I could reach my goal.
I am posting more or less the same steps in English for future use, hopefully it will be better than translate the Dominic’s post with google (even if I do not bet a cent about this!)