Chris,
	There are two things that will make the PROMs unhappy with
a disklabel:

1. wrong "magic" number (literally, it looks in a specific place
in the label for a particular number to know that the disk has been
formatted/partitioned and that the rest of the data read from where
the label is supposed to be is likely to be valid).

2. one or more partitions which are not whole cylinders in size.

Alas, it gives the same error message for *both* conditions.

	Erik E. Fair	fair@clock.org