growisofs gives random error messages on 8.1 amd64

[Erich Dollansky]

Hi,

On Monday 26 July 2010 09:11:22 Polytropon wrote:
> 
> Your command was
> 
> 	growisofs -dvd-compat -speed=4 -Z /dev/cd0=imagefile.iso'
> 
> You can omit the -speed parameter as growisofs usually (this means,
> at least by my individual experience) will automatically determine
> the correct writing speed.

the speed parameter got stuck after I tried the lowest supported speed to exclude the speed as the cause.
> 
> As writing started - your example did show that - I don't think
> it's a problem with permissions (cd, pass, xpt devices).

I did it as root.
> 
> 
> On Mon, 26 Jul 2010 08:35:53 +0800, Erich Dollansky <erichfreebsdlist at ovitrap.com> wrote:
> > The output is random. It even claimed once to have the DVD finished.
> 
> 
> > But the DVD is not mountable.
> 
> Check "file - < /dev/acd0" if an ISO file system has been written
> to the DVD.
> 
> 
> 
> > As it was never used to burn, it also could be a hardware problem.
> > Reading was not a problem on 8.0.
> 
> Could be, especially if you consider the range of errors, from "no
> write at all" to "finished writing" (with no readable result).

These optical media drive me crazy. I once have had a CD with a very fine crack. Once it worked, once it did not. Over time, the crack became visible. As it was an installation CD it caused a lot of problems before realising that the CD is the source.
> 
> 
> 
> > I followed this advice:
> > 
> > http://www.freebsd.org/gnome/docs/halfaq.html#q6
> 
> Just for testing, I would first eleminate HAL and all the "automation
> magic". The test setting should be as "clean" as possible.
> 
Ok, this is what I will do later when my main work has finished using X.
> 
> Polytropon
> Magdeburg, Germany
> Happy FreeBSD user since 4.0

My first BSD was running on a PDP-11 in 79. Some time has passed since then.

Erich