<human>:  How to permanently erase data off a hard drive?
<bot>: Permanently Erase Data Off a Hard Drive
1. Download DBAN from http://www.dban.org/.
2. Burn the DBAN ISO file to a CD or USB drive.
3. Insert the CD or USB drive in the computer with hard drive you want to erase.
4. Boot the computer from the CD or USB drive.
5. Press Enter.
6. Select the drive(s) you want to erase and press Spacebar.
7. Press F10.