I used to work, day job, as electrical engineer for an outfit that wrote a lot of software involved in the defense industry as well as many a proprietary private outfit.

Writing zeros on a drive was prohibited. For good reason. There is a way to read the leftover magnetic field that used to be ones...

So we'd give away the older computers, but each and every one, the hard drives were removed -- and the shop machinist would drill at least two 1/4" holes right through the sides of the drives and through the internal platters.

Only then could the drives be disposed of.

I still do that with any of my drives that may have personal identification or the likes ever stored on 'em.


--Mac

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