I suspect you would probably need an field strength somewhere close to that in the toroid field created by the European JET to create a favourable magnetic bottle sufficient to contain nuclear fusion before a shielded drive with a 5 micron magneto-resistive head would be affected.

Now I'm not sure, but I think this means no, Doug.
_________________________
1998 BMW ///M3 30 GB Mk2a, Tuner, and 10 GB backup