Hello friends and thank you for taking the time to look at my thread. I am a little embarrassed to admit that a dell GX270 has got the better of me. I have a number of units that i have been trying to upgrade. A dell GX 270 has 1 unused SATA connection on the motherboard. I have been trying to remove the standard 40 gig IDE hard drives and replace with various size SATA hard drives ranging from 80/120/320/500 gig drives. But no matter what i connect to the SATA connector on the motherboard the BIOS shows as unknown device. Even if i try to connect a SATA optical drive i still get the same unknown device. So basically what ever i connect to the SATA mobo connection does not work. This has happened on 7 or so units so it is not a one off. Can someone please shed some light on the situation and put me out of my misery. You will definitely go on my Christmas card list if you can offer some advice. Thank you..