virtual drive errors

[Ulrich Spörlein]

On Thu, 08.04.2010 at 00:50:40 +0300, Andriy Gapon wrote:
> Looking at cdcheckmedia and at the logged READ TOC (0x43) SCSI command errors
> (as reported by Markus) I see the following problem.  Even if cdsize() call at
> the beginning of cdcheckmedia() succeeds, a subsequent failure of cdreadtoc()
> throws us to 'bailout' label which is past the code that sets d_mediasize.
> 
> I think that the following patch should help with this situation (and possibly
> other cases with READ TOC problems):
> 
> --- a/sys/cam/scsi/scsi_cd.c
> +++ b/sys/cam/scsi/scsi_cd.c
>[snip]

This patch, much like the one in kern/138789 makes my external Plextor
PX-755A drive successfully read "mastered" DVD media, i.e., the retail
kind, not DVD-R/RW.

So, please commit some version of this patch. Thanks!

Regards,
Uli