The drive could well be dead.
You mentioned that Nero was hanging after you clicked the 'Cancel' button but what I want to know is, was the drive still active just before you restarted your PC? By active I mean, green LED flashing on the front bezel or perhaps a noise coming from the drive?
If one of these things happened just before you restarted then it may be possible for a fresh firmware install to recover the drive.
I can provide details on how to install firmware if you don't know how to do it.