How does one backup aA/UX to floppies ?

[Donn Fishbein]

(I'm sure that this is covered in the extensive A/UX manuals, but
unfortunately we have received our machine while the manuals are
backordered.)

How exactly do you back up A/UX to floppies?  More importantly,
starting with a newly formatted disk, how do you restore it?

Do any tape drives other than Apple's allow backup of the A/UX
partitions while running under MacOS?