I have an HP DL100 NAS server that decided to throw a fit. It is setup as RAID5 with 4x500GB SATA drives. I cannot boot into Windows. The Adaptec 2420A Controller says no logical drives found, but it see's all the hard drives ok. I have replaced the controller with 3 new ones. I have replaced the system board, I have replaced the SATA cables. What do I have to do, to get this data back? I thought the whole thing about RAID was redundancy. Any ideas?