DVD ROM is missing

Hello, everybody,

I installed the UCS server with the DVD drive. In /etc/fstab a corresponding entry was created:

/dev/sr0 /media/cdrom0 udf,iso9660 user,noauto 0 0

When I try to mount a CD I get the message:

root@vmhost02:/var/lib/libvirt/images# mount /media/cdrom0/
mount: no medium found on /dev/sr0

Okay, I thought the drive was broken. Now I tried it on another UCS server. There it is exactly the same.

How can I find out if the DVD drive is present and which device name?

best regards