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On Fri, 3 Jan 2003, Michael wrote:
> > Why is that? After all bits have been flipped to zero, where is the
> > information stored about their previous states?
>
> People with the right tools can extract the bits that were contained
> several times back. Paranoid people usually rewrite the drive something
> like seven times.
I'd just hit it with a sledgehammer instead! ;-)
Seriously though, how is the information about previous states of bits
stored on the drive? It would seem to imply that the drive has a much
greater capacity than we usually think -- it can hold the current
information and also past information. But how?
Mike
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