Damn! Clicked on helpful button my mistake - again! Quite! I lost interest when it became a discussion on the benefits of various different RAM types which is not my forte, I didn't realise that the original problem had reappeared. Very interesting and well done on finding it. However are you sure it is the hard drive as it could possibly be the IDE cable, just an idea. Also did you have the master drive on the end of the cable and the slave in the middle? If it was the other way around then that may have been the trouble. If that was the case then I would try plugging the drives in as above and see if that makes a difference. Sorry if this seems all rather unnecessary and feel free to ignore me if you wish but I would be fascinated to find an error like that and would probably spend the next several days playing around with it until I'd found the exact problem.