This happens for some (but not all) CDs/DVDs burned with Nero while using WinXP.

After inserting the disc in my Linux box, nothing happens and I'm unable to mount/access it.

Any ideas?

Not enough information.......

What does the /etc/fstab entry for the CD/DVD device look like??

With the unaccessible burned media in the drive, what is the output from typed command show;

/lib/udev/vol_id --export /dev/cdrom
(please adjust to match your actual configuration)

What is the exact error message when you attempt to mount the media??? From the console or xterm session type something like;

mount -t auto /dev/cdrom /media/cdrecorder
(again please adjust to your actual configutation)

.

First of all, I have no entry for the CD/DVD device in my /etc/fstab file.

After typing /lib/udev/vol_id --export /dev/cdrom, I get the following output while the inaccessible media is in the drive:

linux-7y2f:~ # /lib/udev/vol_id --export /dev/cdrom
ID_FS_USAGE=filesystem
ID_FS_TYPE=iso9660
ID_FS_VERSION=
ID_FS_UUID=
ID_FS_LABEL=CREATIVE SUITE 2
ID_FS_LABEL_SAFE=CREATIVE_SUITE_2

Mounting with the '-t auto' flag seems to work:

linux-7y2f:~ # mount -t auto /dev/cdrom /media
mount: block device /dev/cdrom is write-protected, mounting read-only

Any idea what's wrong?
Thanks for your help, I really appreciate.

Sounds like haldaemon and/or messagebus is not running or loaded. Check the services and see if they are loaed and running, also check that autofs is loaded and running.

As a workaround you can add an entry in /etc/fstab like for example;

/dev/cdrom /media/cdrecorder auto noauto,users,ro 0 0

Other option may be used for the details see 'man mount' and 'man fstab' also remember to create the mountpoint before attempting to mount the media; mkdir /media.cdrecorder

.

Message-bus, Hal daemon and AutoFs are loaded and running.

I also added an entry in my /etc/fstab (and the mount point exists too) but with no luck: I still have to mount the media manually with the Mount command.

This is a bit strange then.........

The output from the typed command "/lib/udev/vol_id --export /dev/cdrom" suggests that your CD/DVD drive is known.

Using the output from the typed command; ls -al /dev/cdrom

You might want to try replacing the /dev/cdrom part with the actual hardware device (dev/hdc or whatever) for the /etc/fstab entry.

My mistake, when I stated that autofs is loaded, I ment that:
linux-7y2f:~ # chkconfig autofs
autofs on

But if I do:
linux-7y2f:~ # ps -ef | grep autofs | grep -v grep
linux-7y2f:~ #

And also:
linux-7y2f:~ # /etc/init.d/autofs status
Checking for service autofs: running
Configured Mount Points:
------------------------
/usr/sbin/automount --timeout 60 /misc file /etc/auto.misc

Active Mount Points:
--------------------
/usr/sbin/automount --timeout 60 /misc file /etc/auto.misc

Finally:
linux-7y2f:~ # cat /etc/auto.misc
#
# $Id: auto.misc,v 1.2 2003/09/29 08:22:35 raven Exp $
#
# This is an automounter map and it has the following format
# key [ -mount-options-separated-by-comma ] location
# Details may be found in the autofs(5) manpage

cd -fstype=iso9660,ro,nosuid,nodev :/dev/cdrom

Is it right?

Looks about right;

FYI: by placing code and /code inside the brackets [] one can create the output like above. The same also works with other things like quote and b for bold