We have a X4100 M2 with 2 Sun 73gB SAS Seagate Savio drives. We are trying to use it as a firewall. Tried loading pfSense and Clear OS but it will not install on the hard drive, says the drive does not exist. Tried installing a linux distro and had the same problem. Is there something in the LSI controller menu that needs to be configured? It sees both drives but we cannot install anything. Have tried both drives with the same problem. Also tried loading Windows 7 also with no luck. It could be that both drives are bad but before I buy another one want to rule out any BIOS or SAS controller problem.