On 2012-03-20, js.b1 wrote:

On Mar 20, 11:02Â*pm, "brass monkey" wrote:
What do you guys do with old hard drives?

DBAN.

Does take a long time to run on old or very large hard drives.
Available for a few £ as a linux bootup disk, runs like a DOS 6.0
screen, gives time to complete, various levels of security.

DBAN is free (in both senses of the word).

http://www.dban.org/download

(Obviously you have to buy your own blank CD.)