On Mon, 19 Jan 2009, Stefan Kelm wrote:
...it has to be overwritten completely, sector
by sector. Although this takes time, it costs nothing: the dd command in
any Linux distribution will do the job perfectly.
Note quite perfectly, and not nearly as fast as the built-in option (see below).
The myth that to delete data really securely from a hard disk you have
to overwrite it many times, using different patterns, has persisted for
decades, despite the fact that even firms specialising in data recovery,
openly admit that if a hard disk is overwritten with zeros just once,
all of its
On Mon, 19 Jan 2009, Stefan Kelm wrote:
... and who knows where else? Really, to ensure that nothing more can be
recovered from a hard disk, it has to be overwritten completely, sector
by sector. Although this takes time, it costs nothing: the dd command in
any Linux distribution will do the
Peter Gutmann has responded
http://www.cs.auckland.ac.nz/~pgut001/pubs/secure_del.html
(see the Further Epilogue section well down the page)
--dan
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