Marco Peereboom wrote:
Grind them up. There is nothing else you can do to "permanently" wipe
disks. Residual magnetism is always there provided good enough
equipment. If your data is that sensitive there is nothing else but the
grinder.
Be sure that you do this yourself or personally witness the act. I just experienced this myself where a contractor was *paid* money to grind up hard drives in a bunch of old Sun hardware before the equipment was auctioned off online. The contractor even issued 'certificates of destruction' for the drives... long story short, the drives had not been destroyed. They were intact, untouched, not even a software wipe. The drives booted and worked fine. A simple 'boot cdrom -s' to change the root passwd was all it took to view the hard drive's content.
