Greetings!

More likely there is a hard drive glitch - cold solder joint, bad cable, etc. Do you see this problem when on AC power? It sometimes only shows up when used in the car because a) temperature extremes and b) possible low voltage or bad power feed not letting the drives spin up properly.

I would recommend a close inspection of both the hard drive cable and the IDE header on the motherboard.
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Paul Grzelak
200GB with 48MB RAM, Illuminated Buttons and Digital Outputs