(using ubuntu fiesty fawn)
I wouldn't exactly say that the problem i am having is in mounting the cd.
I am able to mount the cd and i am able to play audio files but i am not able to read Data files . Please tell me what could be the reason for this?

What command do you use to mount the data cd?

Did you make the data cd yourself? If so, what command did you use to make the cd?

Also, what does your /etc/fstab look like?

well i use mount /media/cdrom.. (in a general scenario it should be mounted automatically)
yes i made the data disk myself , i have read from it earlier and also checked it out on some other machine ...
--my /etc/fstab looks like:



# /etc/fstab: static file system information.
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
# /dev/sda1
UUID=ff89e892-8820-4513-b830-8da56e05585d / ext3 defaults,errors=remount-ro 0 1
# /dev/sda5
UUID=962ddb3b-59d9-4e34-b5a7-ad7ca0a0193d none swap sw 0 0
#/dev/hdb /media/cdrom0 udf,iso9660 user,noauto 0



--my /etc/mtab looks like


/dev/hda1 / ext3 rw,errors=remount-ro 0 0
proc /proc proc rw,noexec,nosuid,nodev 0 0
/sys /sys sysfs rw,noexec,nosuid,nodev 0 0
varrun /var/run tmpfs rw,noexec,nosuid,nodev,mode=0755 0 0
varlock /var/lock tmpfs rw,noexec,nosuid,nodev,mode=1777 0 0
procbususb /proc/bus/usb usbfs rw 0 0
udev /dev tmpfs rw,mode=0755 0 0
devshm /dev/shm tmpfs rw 0 0
devpts /dev/pts devpts rw,gid=5,mode=620 0 0
lrm /lib/modules/2.6.20-16-generic/volatile tmpfs rw 0 0
binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw 0 0

According to your mtab listing, the cdrom is not mounted. So you are reading the contents of the directory instead, which is empty.

--for an audio disk my mount gives the following result



/dev/hda1 on / type ext3 (rw,errors=remount-ro)
proc on /proc type proc (rw,noexec,nosuid,nodev)
/sys on /sys type sysfs (rw,noexec,nosuid,nodev)
varrun on /var/run type tmpfs (rw,noexec,nosuid,nodev,mode=0755)
varlock on /var/lock type tmpfs (rw,noexec,nosuid,nodev,mode=1777)
procbususb on /proc/bus/usb type usbfs (rw)
udev on /dev type tmpfs (rw,mode=0755)
devshm on /dev/shm type tmpfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
lrm on /lib/modules/2.6.20-16-generic/volatile type tmpfs (rw)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
/dev/hdb on /media/mp 3 type iso9660 (ro,nosuid,nodev,uid=1000,utf8)


obviously different from /etc/mtab when a data disk is inserted , how is that possible?? i don't get it...

Add an entry to /etc/fstab for your cd drive:
/dev/hdb /media/cdrom iso9660 defaults,users,ro,noauto 0 0

well it worked but still i have a few questions
1. why should one give noauto??
2. well it is dvd reader actually and i have a few dvds it is still not able to read...
i tried mounting it by specifying udf file system but still it was no use ... what all filesystem types are possible on dvds and how should i specify more than one file system
in /etc/fstab