Hello Waldi,
> > 
> > is printed and the system hangs. Did you change something on the 
> > NBR/NBU/NBS partition id system?
> 
> Oops, looks like a bug in the disklabel routines. The partition ID
> system has indeed changed, but should be backwards compatible (or
> did you take that backward compatibility stuff out, Leo?).
No, not that I know of. This is also the first complaint I hear
about it. 
> 
> Try renaming NBR -> NBD. This is necessary anyway, to be able
> to write a NetBSD disklabel (there should be some basic notes
> about the disklabel stuff, probably in INSTALL or some README).
Yes, the latest install document contains a section on how to migrate
to the NetBSD-label partitioning. Rather heavily based on what you
have send me ;-).
> 
> If that doesn't work, I'm afraid you've got a more essential problem.
> Did you, by any chance, partition your disk with SCSI-tools?

Leo.