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Re: 'Shredding' a hard disk



On Thu, Jun 13, 2002 at 02:54:44PM +0200, Ivo Wever wrote:
> Robert Waldner wrote:
> >But, for all practical values, a simple `dd if=dev/urandom bs=1M \
> > of=/dev/hdX` should be quite sufficient.
> 
> Some people advise to repeat this procedure several times. Can anyone
> explain why? I see no reason why one pass doesn't suffice.

If you have good enough equipment, it's possible to retrieve even
overwritten data from magnetic disks.

-- 
Colin Watson                                  [cjwatson@flatline.org.uk]


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