José Romildo Malaquias <j.romi...@gmail.com> wrote:

> > Did you ever write a DVD-R with this hardware?
>
> Yes I have written some DVD-R discs with this hardware. When I bought
> the notebook and installed gentoo in last January, burning with cdrecord
> (from cdrtools) used to work. Sometime later (about one month, but I am
> not sure) it stopped working. Probably after some upgrade. I do not
> remeber exactly. By then I could not look at the problem because of lack
> of time. Since then I have been using Nero Linux for recording DVD-R
> discs without problems.
>
> Some information I have sent in previous messages may not be accurate
> enough because I have forgotten to change the media to a new unused
> one. So I am attaching a new file with the output of some requested
> commands.

With the messages you send, it cannot be cdrecord but either your drive
or the Linux kernel.

One interesting point is that cdrecord is unable to do a DMA speed test.
THis may have different reasons and without knowing the reason, I cannot
say more...

You may try to call cdrecord -v -checkdrive -V

and have a look at the SCSI read buffer command.

You also may try to reduce the transfer size to 16 kb by adding "ts=16k"
to the command line in hope that it is a driver bug that goes away with smaller 
transfer sizes.



Jörg

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