On 02/08/2016 07:38 PM, Always Learning wrote: > On Mon, 2016-02-08 at 14:22 -0800, John R Pierce wrote: > >> the only truly safe way to destroy data on magnetic media is to grind >> the media up into filings or melt it down in a furnace. > I unscrew the casing, extract the disk platter(s), slide a very strong > magnet over both sides of the platter surface then bend the platter in > half. > > How secure is that ? > > I can't afford a machine that grinds everything into dust particles. I have seen a guy in the I.T. department where I work take a hard drive....remove as many stickers from it (to make it porous as possible) and then soak it in a "brine" of ammonia, hydrogen peroxide, bleach, and salted water...for like a week or two. Afterwards? total useless junk. EGO II