Dit is die linux distru:
http://www.linux-kurser.dk/secure_harddisk_eraser.html
Kwam het volgende tegen op een forum, 't s in het Engels maar dat lijkt me geen probleem:
Secure Harddisk Eraser
-------------------------------------------------
A single floppy disk that erases your old harddisk.
When selling your old computer you rarely want the buyer to get access to your old data. Even if you format your harddisk it is often possible to recover data. Most erasure utilites will only erase the directory information, so the actual data is still on the harddisk.
To erase the harddisk you can just overwrite the whole harddisk with zeroes. But even this is not enough: With some special hardware it is possible to determine what was written before.
So what you need to do is overwrite the whole harddisk several times with different patterns. Peter Gutmann recomends 35 passes with different patterns. The DoD 5220.22-M NISPOM recomends 3 passes.
Secure Harddisk Eraser implements these 35 or 3 passes on a single floppy. Just boot from the floppy, wait 60 seconds and the harddisk will start to erase. When the erasure is done the computer will beep every second. This makes it possible to erase computers without having a monitor attached. To make sure the erasure is succesful you should try rebooting the machine.
How to get started
Get the floppy image for Secure Harddisk Eraser. Shift-click here for 35-pass version or here for 3-pass version.
Put the image on a floppy. You may want to use dd or Rawwrite for that.
Put the floppy in the computer that you want erased and boot the computer. (If you computer will not boot from floppy then you probably will have to set this up in the BIOS).
Wait. Secure Harddisk Eraser will automatically start erasing your harddisk after 60 seconds. Expect 3 hour/GB for the actual erasure.
When the erasure is complete you computer will beep every second.
Test the computer to see if the erasure went well by booting it. (Remove the floppy disk first). If the computer can no longer boot the harddisk has been erased.