Re: Magnetic dust
I assume you don't mind killing the heads at the same time, so fine pumice powder would take advantage of the disks spinning and get the head to grind it in...
Alternately, corrosive magnetic epoxy resin would be handy, it'd turn the platters into one solid mass, and do a pretty good job of rendering unreadable any bits that someone managed to delaminate...
Biting the hand that feeds IT
