[clug] Secure Erase of disks/drives
Tomasz Ciolek
tmc at vandradlabs.com.au
Tue May 8 03:49:33 GMT 2007
I have quite successfully used /dev/zero to zerou out the disk...
I mean in the WHOLE disk is juzt zeros, what difference does it make as
to ist previous contents?
Tomasz
On Tue, May 08, 2007 at 01:20:49PM +1000, Adam Thomas wrote:
> On Tue, May 08, 2007 at 12:56:58PM +1000, Alex Satrapa wrote:
> > Hmm... I wonder if I really meant /dev/urandom? I think urandom
> > resorts to pseudo-random numbers after the entropy pool is exhausted,
> > where /dev/random gives you random numbers only while there are bits
> > left in the entropy pool.
> >
> > Or... just cat an MPEG movie to the disk? Compressed junk is
> > probably "random" enough unless someone knows exactly which movie
> > file you used, and then uses that to guide their interpretation of
> > the output from the scanning magnetic force microscope...
>
> I've been meaning to hook up a webcam and run video_entropyd[1] for a
> disk scrubbing machine. I just don't have anywhere in my office that
> has enough activity to generate decent entropy.
>
> The same guy has also writen an audio_entropyd and has links to other
> code/devices which aid in entropy gathering.
>
> Adam
>
> [1] http://www.vanheusden.com/ved/
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Tomasz M. Ciolek
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