Re: Destroying compact flash securely
From: oops (gte862i_at_mail.gatech.edu)
Date: 04/29/03
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Date: Tue, 29 Apr 2003 21:28:46 +0000 (UTC)
Roger Schlafly <rogersc@mindspring.com> wrote:
: "Simon Johnson" <Ckwop@hotmail.com> wrote
:> I was just wondering whether there are any official recomendations on
:> how to destroy these types of media.
: Why not just overwrite the data with something else?
I am not sure that would work. Since flash can only be overwritten a
certain number of times before it is a dead bit (millions of times), most
flashcards are designed with a table of previously flipped bits so that
they can write the data into a new location so that it doesn't wear out
the same bits over and over again. Basically, when you think you are
overwriting a file, it may be putting the new data in a different spot on
the card for each write. If the decision is made in software, it may be
possible to rewrite the drivers, but if it is made by a chip on the card,
you may not be able to control it.
-- Justin Kennedy Email: jkennedy@cc
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