I noted your posts to misc@ about your cd0 issue.
It looks at first glance like the drive is recognized, but that you have blank media inserted. I didn't reply on misc@, because I'm not sure if that's the case; I'm not where I can test blank media to see if I can duplicate your symptom.
As for the bell, oh my word, there were two threads, with 24 posts, on misc@ in the last few days:
Thread #1:
http://marc.info/?t=124031178000002&r=1&w=2
Thread #2:
http://marc.info/?t=124040094900002&r=1&w=2