hmmmm..... do you have older IDE cables? on that maxtor, because the same thing happened to me once, but it turns out I had the IDe cable backwards because the cable was older and had no pin blocks, so it could go on either way. it stumped me for a week. also if that doesnt work this will.. go onto or somewhere and get an EMPTY external 3.5" hd enclosure, they connect through USB or IEEE1394. just pop the drive into that, and boom take all the files form your old HD and put them on that IBM, then reformat the Maxtor and try using standard IDe again....