[NTLUG:Discuss] SCSI problems - (Was: aic7xxx: infinite...)

[Kevin Brannen]

Steve Baker wrote:
> 
> Buddy Brannan wrote:
> 
> > *Hmm* I'm also having a problem with a CD-R. (SCSI, of course)
> >
> > Some months ago, I got a 2X write, 4X read external CD-R, a JVC which is
> > the same drive as one of the Teac drives. I was actually able to burn an
> > ISO image with it once, and I don't remember if it was before or after I
> > upgraded to 2.2.14.
> 
> I'd just upgraded to 2.2.14 - but I bought the CD writer the day AFTER
> I upgraded - so I had never tried it with an earlier kernel.

I'm about to upgrade my machine to SuSE6.4, with a 2.2.14 kernel; so
I'll find out. :-)  And yes, I use the aic7xxx driver too.

> Well, if your symptoms are similar to mine, it could be a kernel bug
> in 2.2.14.

I doubt the bug theory, but hey, stranger things have happened. :-)

> 
> One thing I tried was this:
> 
>   cdrecord -v driver=scsi2_cd dev={whatever} -toc
> 
> (the 'driver=scsi2_cd' option forces the command to use a very
> generic SCSI drive reader - rather than the one it thinks it
> should use on the basis of auto-detection).

So auto-detection is failing?  Try forcing it to the one you need, or
the generic as you're doing if there is no other.  Also try writing
with the -dummy command.  That does a test write while doing nothing
to the disk, and you must have one in the drive BTW.  For example,
here's the command I use:

cdrecord -v -dummy -fs=6m -dev=0,3,0 -speed=4 -data /dosh/cdimage.raw

That will cause your lights to change as if it were writing, but it
won't.  If that works, with your proper driver arg, then you *should*
be able to successfully burn a disk.  That is assuming that the file
(/dosh/cdimage.raw in my case) was successfully made with mkisofs.

Kevin