From owner-freebsd-questions@FreeBSD.ORG  Wed Dec 23 20:03:17 2009
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Date: Wed, 23 Dec 2009 21:03:13 +0100
From: Polytropon <freebsd@edvax.de>
To: Modulok <modulok@gmail.com>
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On Wed, 23 Dec 2009 12:05:40 -0700, Modulok <modulok@gmail.com> wrote:
> List,
> 
> 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.

There are platform where it works. :-)

What do you mean by "destroy" - make it unreadable before
or after something has been burned onto the CD-R? You can
use /dev/random to fill the writing process for tools like
cdrdao or cdrecord, e. g.

	dd if=/dev/random bs=1024 count=100 | cdrecord -tao -data -

Maybe you need to set specific options (dev=, speed=) for
your recorder.

However, after a successful recording, it's easier to destroy
the CD-R physically. If the session (and media) is already
closed, the same idea applies.


-- 
Polytropon
Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...