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On Wed 2009-12-23 12:05:40 UTC-0700, Modulok (modulok@gmail.com) wrote:

> Is there a software method (not a microwave oven) to destroy a CD-R?
> Something like:
> 
>     dd if=/dev/random of=/dev/acd0?
> 
> Obviously the above doesn't work, but the idea is there.

I suspect most CD burners are designed to disallow overwriting of data
already written to a CD-R.  Otherwise the software method would
already exist and you'd see lots of people treating CD-Rs as
rewritable discs.  Which they aren't.

Personally I'd physically destroy the disc using whatever method you
prefer, eg. removing the label with steel wool, or disintegrate the
disc with a shredder.