destroy harddisk

Concept

Shredding scheme (an algorithm used for shredding)
-Write Zeros: The simplest method, writes only binary zeros.
- DOD 5220-22.M: More powerful, overwrites data in three passes with random values. This is the default eraser method.
- US Army: Three passes algorithm that complies to the US Army specifications.
- Peter Guttman: Overwrites data in 35 passes. Very slow and in most cases not required.

Download

http://www.harddriveeraser.org/download.php

Reference

http://www.harddriveeraser.org/eraser_help.php