RX01 drives and RX02 drives are the same. Only the
logic differs.
I was under the impression there was a minor electical difference between
the drives -- something about a resistor on the head connector. But I
might be thinking of some other unit.
Most RX01 and RX02 drives are mechanically the same. But I've seen an
early RX01 with a different drive mechanism. Most of the drives have a
pressed metal housing with a little die-cast chassis to hold the spindle,
motor, and head positioned. That's mounted into the housing, the disk
holder bits are mounted seperatly to the hosing.
The other drive (which had a 'CDC flavour') had a diecast
chassis/housing. Everything was mounted on that. IIRC, there was an air
duct cast as past of the housing.
I think the 2 types of drives are totally compatible externally (i.e.
there are no PSU or R/W board changes), but most of the internal bits are
different.
-tony