Re: [Dvdrtools-users] Re: Weird "scsibus" assignment -- WAS: Sony DRU-500A: Cannot even burn DVD+/-Rs

[Arndt Schoenewald]

Hi Dominique,

I doubt very much that your problems had anything to do with the version
of mkisofs you were using. cdrecord-prodvd does not care at all what the
image file contains that it writes to the disk.

However, cdrecord-prodvd (at least the current 2.0 version) was made for
writing DVD-R and DVD-RW disks, and if you use it to write DVD+R and
DVD+RW disks, anything can happen. I would have assumed that it would
simply fail (as it in fact does with most drives), but as you said, on
the DRU500 it seems to work somewhat, with some strange effects (i.e.,
-dummy not working).

Upshot: Use the dvd+rw-tools (http://fy.chalmers.se/~appro/linux/DVD+RW/)
to write DVD+R and DVD+RW disks.

Good luck,
Arndt


On Mon, Jan 27, 2003 at 03:23:37PM +0000, Dominique Alessandri wrote:
> Ok, I managed to get the whole thing working. Here are the reason for 
> the problems I observed:
> 
> 1. Initially I used the wrong version of mkisofs to create iso images - 
> sorry for that!
> 
> 2. The -dummy option of cdrecord-prodvd and dvdrecord is not as "dummy" as
> one would think it is. I did my first tests with a DVD-R, but was using
> the wrong the mkisofs command to generate the image. The subsequent tests
> I made with a DVD+R - still using the wrong mkisofs. However, although I
> used the -dummy option the drive _did_ write to the DVD+R before it failed
> because of the wrong ISO format. As a consequence all further test with
> the correct ISO images failed as well. I ignored the warning about the
> possibility of the media being prerecorded because I consistently used the
> -dummy option (one also gets warnings about incorrect start sectors when
> burning CDRs...) As far as I can tell the -dummy option is working fine
> for DVD-R but not for the DVD+R media. I verified this by accidentally
> sacrificing yet another DVD+R. Anybody to confirm this behavior?
> 
> In the description of the "driver" option the man page states the 
> following:
> 
> ... There are two special driver entries in the list: cdr_simul and
> dvd_simul.  These driver entries are designed to make timing tests at any
> speed or timing tests for drives that do not support the -dummy 
> option. ...
> 
> Seemingly there exist drives that do not support the -dummy option. 
> However, I am not sure whether the problem I observed is caused by the 
> firmware of the drive or by the device driver not providing me an error 
> message in case the enabling of -dummy mode fails.
> 
> Thanks to everybody for their support!
> 
> Dominique

-- 
Arndt Schoenewald <address@hidden>, Software Developer
Quelltext AG (http://www.quelltext-ag.de), Dortmund, Germany