Not sure if anyone else has experienced problems with the this card, but I'm having real problems initializing a Raid 5 array using 4 1TB SATA Hard Drives. I've checked the drives are supported and tried both foreground and background initialization. It seems to fail almost immediately after beginning the process. I have an early 2008 2.8 8 Core Mac Pro. I've upgraded to the latest EFI bios and the latest system drivers. The Drives are supported and all show ok SMART status. I've wasted a week of my life trying to get this built now and am getting close to throwing the hole thing out of the window I'd depreciate any suggestions!