Unable to mount an UDF DVD

S

sharsch

Hi!

Today I came across another problem. After burning a DVD for backup I tried to mount it with the following error:
Code: 
sudo mount -t udf /dev/cd0 /mnt
mount_udf: /dev/cd0: Invalid argument
The DVD was burned with growisofs as described in the handbook. I checked another DVD (to be sure it is not just an unusable disk) which is working and is definitely UDF. I never tried to mount a DVD before only CDs and that worked fine.
 
My /etc/devfs.conf is untouched:

$ cat /etc/devfs.conf
Code: 
#  Copyright (c) 2003 The FreeBSD Project
#  All rights reserved.
#
#  Redistribution and use in source and binary forms, with or without
#  modification, are permitted provided that the following conditions
#  are met:
#  1. Redistributions of source code must retain the above copyright
#     notice, this list of conditions and the following disclaimer.
#  2. Redistributions in binary form must reproduce the above copyright
#     notice, this list of conditions and the following disclaimer in the
#     documentation and/or other materials provided with the distribution.
#
#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
#  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
#  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
#  ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
#  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
#  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
#  OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
#  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
#  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
#  OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
#  SUCH DAMAGE.
#
#  $FreeBSD: release/9.0.0/etc/devfs.conf 227018 2011-11-02 13:51:29Z gavin $

# These are examples of how to configure devices using /etc/rc.d/devfs.
# The first parameter is always the action to take, the second is always the
# existing device created by devfs, and the last is what you want to change.
# The name of the action is only significant to the first unique character.
#
# Examples:

# Historically X depended on this, but version 4.3.0 doesn't seem to anymore
#link   ttyv0   vga

# Commonly used by many ports
#link   cd0     cdrom
#link   cd0     dvd

# Allow a user in the wheel group to query the smb0 device
#perm   smb0    0660

# Allow members of group operator to cat things to the speaker
#own    speaker root:operator
#perm   speaker 0660
I don't have /dev/acd0. I think my drive is an internal scsi drive (MacBook).

$ sudo camcontrol devlist
Code: 
$ sudo camcontrol devlist
<Hitachi HTS543216L9SA02 FB2AC50F>  at scbus0 target 0 lun 0 (pass0,ada0)
<HL-DT-ST DVDRW  GS21N SA18>       at scbus1 target 0 lun 0 (pass1,cd0)
So ATAPI/CAM isn't in use here. Am I missing something?HL-DT-ST DVDRW GS21N SA18
 
Thank you for the input. udf.ko is loaded and adding a perm line to /etc/devfs.conf doesn't change anything either. I still get the same error. Any other ideas?
 
Set the owner of cd0 to root:operator and add your user to the operator group. This should allow you to mount cd0 as a normal user. If you want to burn as a normal user set the pass device associated with the drive to the same owner and permissions as the cd device.
 
Still doesn't change anything neither as normal user or even as root I'm unable to mount a DVD always the
Code: 
mount_udf: /dev/cd0: Invalid argument
error.
 
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