Date: Thu, 19 Jul 2012 09:53:58 -0400 (EDT) From: Daniel Feenberg <feenberg@nber.org> To: FreeBSD <freebsd-questions@freebsd.org> Subject: Re: fsck on FAT32 filesystem? Message-ID: <alpine.DEB.2.00.1207190945230.20149@nber9.nber.org> In-Reply-To: <BLU0-SMTP3158B6907CC27BEAF4F8C2C93D90@phx.gbl> References: <201207190253.q6J2r3p0070058@mail.r-bonomi.com> <alpine.BSF.2.00.1207191014310.7414@wojtek.tensor.gdynia.pl> <BLU0-SMTP3158B6907CC27BEAF4F8C2C93D90@phx.gbl>
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On Thu, 19 Jul 2012, Carmel wrote:
> On Thu, 19 Jul 2012 10:15:17 +0200 (CEST)
> Wojciech Puchar articulated:
>
>>> 1) There's a _reason_ the gov't requires hard drives with anthing
>>> higher than 'somewhat' classified data on them to be =physically=
>>> destroyed before leving the secure area.
>>
>> no. for modern hard drives it was already proved that
>>
>> dd if=/dev/zero of=/dev/disk bs=1m
>>
>> is enough to make data unreadable.
>>
>> for very old drives it may not
>
> Would you be so kind as to point out the proof of that statement?
> Please provide an address or location where the documentation
> supporting that statement can be found. By the way, "NOT READABLE" is
> not equal to "UNRECOVERABLE".
I hesitate to intervene in this dispute, but my posting "Can intelligence
agencies recover overwritten data?" at
http://www.nber.org/sys-admin/overwritten-data-gutmann.html
will iluminate this discussion.
dan feenberg
>
> --
> Carmel ?
> carmel_ny@hotmail.com
>
>
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