Using an "SCA to 50-pin adapter", it is possible to use a 300 gig Ultra-320 SCSI drive from 2004, with an Apple II outfitted with the Apple SCSI controller.
It seems possible for the electronics to be capable of accessing more storage than what the available software is currently designed to support. So...
Looking at the electronics only, what is the theoretical maximum block number / disk capacity accessible by the old SCSI controller?
If the old controller has technical limits on the maximum accessible block number, is there a way for the drive to overcome those limits?
Software-wise, what is the maximum usable logical volume or number of volumes that can be created?