Wipe Swap File

[Peter Monta]

Tim May writes:

> Much more expensive would be various electron microscope-based imaging
> methods to directly image the domains and extract subtle signs of past
> write cycles.

I recently took a tour of Park Scientific, the scanning-probe
microscopy people, in Sunnyvale.  One of their demo-stations
showed a small portion of a hard disk (taken with an AFM
tip fitted with a small magnet to generate the force).  Most
impressive.  (I did look closely at the edges of the track,
but saw no sign of previous writes.)

Cheers,
Peter Monta   pmonta at qualcomm.com
Qualcomm, Inc./Globalstar