I have four DVD-Rs that I've tried to burn on but that haven't (as far as I can tell) have any thing burned onto them. We'll call them the "offending" ones. I have a bunch others that haven't been tried, we'll call them "fresh". The ones that have had a little burned onto them are disregarded and discarded.
After installing Kprobe, I inserted an offending disc, and when I did info>disc, Kprobe told me "NO MEDIA". So I inserted another one, and everytime I tried to open KProbe, it would freeze while loading. I inserted yet another offending disc, and the same freeze thing happened. So I inserted a fresh disc, and it loaded properly, and gave me the disc info, including the MID mentioned above.
Strangely, everytime I try info>drive, whether a disc is in or not, Kprobe shuts down without hesitation.
I rebooted the computer, and inserted a fresh disc. For some reason, Kprobe says "NO MEDIA". I inserted another fresh disc, Kprobe reads it fine. So I try burning onto it, but unsuccecssful, adding yet another disc to the "offending" pile.
BUT THEN, I rebooted the computer once more, inserted the very same disc I had just tried burning onto, and Kprobe reads it fine. On a whim, I try burning, and it works.