Allison wrote about the DEC RX01 and RX02 drives being different:
Do look. the two are very different.
[...]
Every other one. same for RX01. Different signals
though.
I don't have documentation, so I'm not disputing that, but this
makes me very curious. How is it that the RX8-E card (M8357) can deal
with any of:
1) RX01
2) RX02 in RX01 mode
3) RX02 in RX02 mode