Quantum's engineering quality was fine. It was their marketing that was retarded. They would sell 4200 rpm drives as part of their "Fireball" line and it gave people the wrong impression.

BTW, the thought crossed my mind that I have a unshielded sub-woofer 4 feet from my Mac. Any possibility that could have something to do with this? It would have to be a pretty stong magnetic field... but I wonder. Only one partition got messed up, so I'm kinda doubtful. Hmmmmm...