Double Layer DVD problem - help
John Wendel
jwendel10 at comcast.net
Sun Jul 24 04:40:52 UTC 2005
William W. Austin wrote:
> Simple question (I posed it previously but probably wasn't clear)
>
> I have a dual-layer dvd burner (Sony DVD RW DRU-720A) which I got to
> replace my old dvd burner.
>
> I can successfully burn single layer dvd's with no trouble on this
> drive - and after testing it works fine under windows.
>
> However every dual-layer dvd I've burned so far is now an expensive
> coaster. I have reread the docs I can find, but don't see any
> additional options for the dual-layer dvd's ...
>
> If somebody could give me some help on this one I'd appreciate it.
>
> Notes: same results (failure) with both mkisofs ... cdrecord and just
> using k3b. Tried on both DVD-R DL and DVD+R DL.
>
> cdrecord-2.01.1; kernel-2.6.12-1.1372_FC3; minimal system activity;
> no underruns reported at all.
>
> My normal script is simple (here's the stripped-down version):
>
> #!/bin/sh
> cd ${1}
> mkisofs -o /<somewhere>/XXX.iso -R -f -T -v -A \
> "XXX" -V "XXX" .
> (mount and verify the iso image, then unmount it)
> cdrecord --dev=/dev/hdc -v -dao speed=16 -data /<somewhere>XXX.iso
>
> resulting single-layer dvd-r works fine. double not recognized and
> won't mount on any drive (on several machines with differing OS's).
>
> I presume I'm missing an option here some place, but haven't found it
> yet... so someone please give me a clue if you can.
>
> Thanks,
> william austin
> waustin at speakeasy.net
Have you tried burning DL at 4 instead of 16? I'm not a DVD guru, but
the spec for my NEC DL drive says it burns DL at 4X vs 16X for SL. If I
read it correctly, your Sony has the same spec.
You might also try growisofs instead of cdrecord like this :
growisofs -dvd-compat -speed=4 -Z /dev/hdc=dvd.iso
Regards,
John
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