We purchased a Adaptec RAID 51645 SATA card a while back and had 16 500GB hard drives attached to it. A few days ago we decided to purchase new WD 2TB hard drives and replace all other 500GB drives. We deleted the array and tried creating another RAID 5 on all drives. For some reason the RAID controller would not see all of the drives, and we would switch them around on the server and it would then see them when initializing them. We then noticed that the firmware on the RAID controller was old so we upgraded it to the latest build of 17911 from 15720. We started the process again but when it starts building the array, it gets to about 1% and then gives a degraded status. The new hard drives are in the compatability list for this controller and are working fine, but for some reason the RAID controller is not completing the array. Can you please help?? I'm not sure what else to do.