Re: Panic with CD use

From: Pav Lucistnik <pav_at_FreeBSD.org>
Date: Tue, 23 Dec 2003 00:34:59 +0100
V t, 23. 12. 2003 v 00:10, Doug White pe:

> > This is a 'me too' report for the problems that have been reported on
> > this list over the last few weeks with problems ripping CDs and/or
> > mounting CDs.  I have not attached a panic report as it is essentially
> > the same as those already reported (a page fault in
> > devstat_remove_entry), but I can if requested.
> 
> I can reproduce this. It appears to be geom doing something goofy.  The
> cdparanoia command causes geom to "taste" the audio CD and sets up the
> devices as such.  For the mount, though, you are probably doing
> 
> mount -t cd9660 /dev/acd0 /mnt
> 
> When you do this, geom does a re-taste of the disc and somewhere between
> removing the old devices and instantiating the new, something ends up
> zeroed and devstat trips over it.
> 
> Whats worse, there is no workaround; putting an audio CD in your -current
> box makes it impossible to use any other CD until you reboot. Grrr.

There is a workaround, sortof. If you have CD drive alone
on ATA channel 1, do

atacontrol detach 1
atacontrol attach 1

Voila, works :)

-- 
Pav Lucistnik <pav_at_oook.cz>
              <pav_at_FreeBSD.org>

On second thought, let's not go to Camelot. It is a silly place.

Received on Mon Dec 22 2003 - 14:35:25 UTC

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