Yep - if the drive isn't getting the clock signal from the bus interface module in the computer (this is used to synchronize the spin rate, among other things), it'll light up its fault light and refuse to do anything. At least you know that the "fault" light works! When one of the other bulbs goes bad, the "fault" light is usually the first one cannibalized because it's so rarely on. -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927