From: "Greg London"<em...@greglondon.com>
   Date: Wed, 10 Apr 2013 23:18:12 -0400

   I have no idea what the signaling looks like on that 4wire connector
   between the platters and controller electronics, but it would seem to
   me that the right bit of hardware hooked directly to those 4 wires
   would be the best way to wipe a drive. If you drive random data onto
   the data wire and slowly work the head from the inside to the outside
   track, you would wipe out formatting data, hidden sectors, sectors
   marked as bad, etc.

There's a simpler way to do this:  Sandpaper.

                                        -- Bob

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