[mdlug] Erase hard drive

[Jeff Hanson]

On 9/15/07, R. Kannan <rkannan at peoplepc.com> wrote:
> I was looking at this article
>
> http://www.redhat.com/magazine/026dec06/features/tips_tricks/
>
> and it says that there are 'newer, more advanced, techniques make it possible
> to retrieve data that was replaced with a bunch of 0'" after issuing the
> command
>
> dd if=dev/zero of=/dev/sdb
>
> How is it possible to 'read' data that has been replaced with zeroes??
>
> Raj

http://free-backup.info/physical-data-recovery.html

Deletion is a basic level of erasure.  Overwriting is better.  Thermite is best.