This is a pertty odd phenomenon. Does this happen with anything else? Have you tried other objects above the drive? Like another piece of sheet metal, or other metal objects - maybe even a magnet (er, maybe not ) I wonder what would happen with this.
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Brent
RioCar MK][a 20GB+80GB
'96 Saab 900s (Not any more)
Still looking for a good way to install in a 2010 BMW 3 series with iDrive/NAV