I just got a DVD burner. It's the Sony DRU-510A.
I think Mandrake tried to mount the DVD-RW automatically but instead it made the DVD-RW the default optical drive and my CD-RW is not detected at all. To further complicate matters, I don't know how to mount from the command line.
The CD-RW is the secondary master and the DVD-RW is the secondary slave.