Re: Inquiry:How to totally wipe out the entire hard drive

[Napoleon <rri0187@attglobal.net>]

Sven Joachim wrote:
> On 2009-09-06 21:12 +0200, John Hasler wrote:
>
> > Napoleon writes:
> > > Overwriting with zeros (or ones) once is not at all secure.  It can
> > > easily be nearly 100% recovered by someone with the necessary
> > > equipment, even more so on a modern drive.
> > Please provide evidence that anyone has ever done this on a modern
> > drive.
>
> Jumping into that discussion, here is evidence that this is not possible
> with modern drives:
>
> http://www.h-online.com/news/Secure-deletion-a-single-overwrite-will-do-it--/112432
>
> So, anyone who wants to sell his hard disk can just use
> "dd if=/dev/zero ..." and be done with it.
>
> Sven

Don't believe everything you read on the internet.  This guy may claim 
to be a forensics expert, and he may claim to be able to do certain 
things.  But he does not have a security clearance (if he did, he 
wouldn't be able to discuss it), and he obviously does not have access 
to some of the equipment available to others.