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Invisible wrote:
> As far as I know, both option #5 and option #6 make it impossible to
> read any useful data from the drive just by plugging it in and asking
> the drive electronics to read the data off the disk surface. In either
> case, you would have to physically dismantle the drive and crawl over it
> with a microscope - which is damned expensive. Using random data (and
> multiple passes of it) reputedly makes this process harder - but not
> impossible. Non-sequential writes are supposed to make it harder still.
The US military overwrites (with pseudorandom data) five times before a
classified drive becomes unclassified.
I suppose a drive could be designed so that a single pass is good
enough, but if you're in that big a hurry, thermite is your friend.
Regards,
John
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