hp proliant mv350 g6

Hi there people at the proxmox forums. Im trying to install proxmox on a server i got from a friend. I tryed 5.1 and 3.4 but both fail under the installations saying there is no harddisk to install it to. I run 2x 300 gb SAS disks and 2x 143 GB SAS disks. Does anyone have any idea what i should...