On 2009-05-16, Ricardo Bevilacqua <rus.s...@gmail.com> wrote:

> Why don't you use the (very old, but still effective) dd [1]
> command to create an ISO image?

Because it won't work.

Have you tried it with an encrypted DVD?

> dd if=/dev/<your-dvd-device> of=<some-path>/bakup.iso bs=2048 
> conv=sync,notrunc
>
> That will make an exact copy of your DVD into your hard disk.

No, it won't.  Commercially sold audio and video DVDs are
encrypted so the DVD drive can't read them unless you load a
decryption key into the DVD drive.  DVD players have keys built
into them.  There are software packages like DeCSS and
libdvdcss that either have a built-in key or know how to figure
one out.

  http://en.wikipedia.org/wiki/Content_Scramble_System

  http://en.wikipedia.org/wiki/DeCSS
  http://en.wikipedia.org/wiki/Libdvdcss

Audio DVD uses a different scheme (that's also been broken):

  http://en.wikipedia.org/wiki/DVD-Audio

> I don't know if this is what you want to do.

Yes it is what he wants to do, but your suggestion is useless
(as could been seen from the OP's post which showed the
read-errors you get when you try to used tools like dd to read
encyrpted DVDs).

-- 
Grant



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