Can't you force the Bios not to have raid activated on the disk controller ?
Your problem is quite similar to bug 22107 in the way that Ubuntu does not provide software raid controller for installation. -- Raid on Motherboard not able to detect Non-Sata Hard disk https://launchpad.net/bugs/57103 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
