OK so in fact what I meant was I didn't manage to remount my cdrom by the command proposed by Dan Kegel : > sudo umount /media/cdrom > sudo mount /dev/cdrom /media/cdrom -o norock The second command doesn't work because of writting protection problems as I said. Of course if I eject and put back my cdrom it will re-mount by itself well... Perhpas I don't understand what yoi said gnivler... What do you mean "put it out of use" ?