DVD wont mount Ubuntu 12.04 [closed]
Try the following terminal commands with a disk in the drive:
sudo mount -t iso9660 /dev/sr0 /cdrom
or more simply
sudo mount /dev/sr0 /cdrom
If you get an error message to the effect of "no media in drive" the most likely reason is a faulty drive. Unfortunately dvd/cd drives are a lot more fragile than most people realise - a piece of fluff or a scratch on the lens can render them useless. Even worse, laptop drives that have the lens on the carriage that is ejected from the device leave them very susceptible to physical damage.