the last harddisk i destoryed had some stuff i did want others getting (crypto keys, finacial stuff, as well as some technical stuff) so I decided to destroy it with a hammer, was actually really good fun smashing all the disks up, I drilled them out as well as i felt that if material wasnt there then it would be allot harder to recover, (the disk was knakered so i decided to experiment i would usually keep them otherwise)

there wasnt allot of need for this in fairness probably just my destructive nature but i enjoyed myself....

you could kill it by putting it in a microwave for a bit, but i doubt your mum will be to impressed....

it sounds very much like you wish to sell the box so total destruction isnt an option, so i suggest some of the software methods suggested above.

I think i remember ninil saying that it was common practice in military/ goverment computers to overwrite the disk 7 times with random 1 and 0, you could easily create a C program to do this.

i2c