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Date:      Tue, 17 Feb 2015 18:30:56 -0500 (EST)
From:      Daniel Feenberg <feenberg@nber.org>
To:        Michael Powell <nightrecon@hotmail.com>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: What's in my hard drive? How can I get rid of it?
Message-ID:  <alpine.LRH.2.11.1502171829280.7759@sas1.nber.org>
In-Reply-To: <mc0ad5$qu2$1@ger.gmane.org>
References:  <54E39F83.70002@gmail.com> <mc0ad5$qu2$1@ger.gmane.org>

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On Tue, 17 Feb 2015, Michael Powell wrote:

> jd1008 wrote:
>
> [snip]
>
> Remove the cover. Remove the platters. Smash all platters with large sledge
> hammer until all pieces are fairly small. Melt material with oxyacetylene
> welders torch. Repeat smashing with hammer. Soak for few hours in
> hydrofluoric acid. Rinse and allow to dry. Grind material into a fine
> particulate dust. Dispose of out the back of airplane while flying or drop
> into convenient nearby volcano. That might be good enough.
>
> Send the electronic components to Kaspersky for analysis.

I did once investigate claims that overwritten sectors could be read by 
sophisticated instruments and posted my results at:

   http://www.nber.org/sys-admin/overwritten-data-gutmann.html


In short - that is pure science fiction.

daniel feenberg

>
> :-)
>
> -Mike
>
>
>
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