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Date:      Fri, 21 Dec 2001 16:10:37 +0100
From:      Wilko Bulte <wkb@freebie.xs4all.nl>
To:        Matthew Emmerton <matt@gsicomp.on.ca>
Cc:        Ross Lippert <ripper@eskimo.com>, freebsd-stable@FreeBSD.ORG
Subject:   Re: DVD kills system
Message-ID:  <20011221161037.A24896@freebie.xs4all.nl>
In-Reply-To: <Pine.BSF.4.21.0112210923550.3440-100000@xena.gsicomp.on.ca>; from matt@gsicomp.on.ca on Fri, Dec 21, 2001 at 09:26:21AM -0500
References:  <200112211404.GAA26213@eskimo.com> <Pine.BSF.4.21.0112210923550.3440-100000@xena.gsicomp.on.ca>

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On Fri, Dec 21, 2001 at 09:26:21AM -0500, Matthew Emmerton wrote:

No, lots of DVDs carry iso9660 filesystems. I have mounted a few, though
not recently, a few months back.

It *could* be a DVD with a slightly warped iso9660 on it of course.
I think you will need to catch a kernel dump.

I'll try to mount a DVD to see what gives here

Wilko




> I thought that DVDs used a different filesystem format (UDF) than regular
> CDs (ISO9660).  If this is true, then what you're probably seeing is
> "correct" behaviour - the ISO9660 code is reading stuff from the CD that
> is nonsensical (in an ISO9660 context) and it's crashing - hard.
> 
> -- 
> Matthew Emmerton      || matt@gsicomp.on.ca
> GSI Computer Services || http://www.gsicomp.on.ca
> 
> On Fri, 21 Dec 2001, Ross Lippert wrote:
> 
> > 
> > This is the first time I have used my DVD player on a DVD and not
> > a CD.  On CDs there has never been a problem.  However, I put in
> > a DVD movie disk, mount it 
> > 
> >  mount -o nosuid,nodev -t cd9660 /dev/acd0c /dvdrom
> > 
> > and then
> > 
> >  cd /dvdrom/video_ts
> > 
> >  ls
> > which works, but then
> > 
> >  file *
> > kills me.  It gives output for a couple files, then hangs for a little bit
> > and then -- ka-boom!  reboot!
> > 
> > Pretty frightening when a read operation on a filesystem can do that.
> > It happened twice in a row for the two times I tried it, so, by induction,
> > I think it will consistently happen, though I am reluctant to try this
> > often.
> > 
> > Looking at /var/log/messages gives me no clue at all.  Is there another
> > log which would be more disagnostic for this?
> > 
> > I don't have another DVD to try this out with, currently.
> > 
> > Should I just wipe the fuzz off and try again?
> > 
> > Attached is my dmesg.

-- 
|   / o / /_  _   		email: 	wilko@FreeBSD.org
|/|/ / / /(  (_)  Bulte		Arnhem, The Netherlands	

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