On Mon, Sep 2, 2013 at 3:02 PM, David Zuccaro
<[email protected]> wrote:
> What is the best way to wash a disk?
>
> I tried this but it is taking forever.
>
> dd if=/dev/zero of=/dev/sdg1

It depends who is trying to read your disk.  If it's a
three-letter-agency, just get a big magnet, and write it off as a
loss.  If not, dd using zero and a larger block size than default
should do the trick.  But I am sure the DoD mandates a certain number
of passes of zeros/ones over the drive.  I believe at a previous time
it was 7 or 9 passes, using 'bcwipe.'  The latter being commercial
software.  If you want to trash a single file, just use 'scrub'
instead of 'rm'

-Matt
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