Cannot find iso9660 to mount cd rom

Troubleshooting
1

I would like to mount an attached cd rom with audio cd and share it across the network. But when I ran the mount command

mount -t iso9660 /dev/sr0 /mnt/cdrom

it said

unknow fileSystem type 'iso9660'

The dietpi version:

root@DietPi:~# uname -a
Linux DietPi 3.10.38 #22 SMP PREEMPT Fri Dec 22 10:45:41 IST 2017 armv7l GNU/Linux

I ran

cat /proc/filesystems

but didn’t see the iso9660

How could I add iso9660 to the filesystem?

2

I think it is my mistake. If I use data CD I can mount the drive. It is none issue now.