The A2090 was a piece of junk when it was originally released, today it can be only used as a cheap source of second-hand Z80 CPUs... ;-)
Other than that it has an XT (mfm) disk controller and a so called "SCSI" (but not a real SCSI) controller interface. The interface never fully supported SCSI and cannot be made to work with any modern (and by 'modern' I mean anything dating from the late 80s till today) SCSI devices.
The card has issues when you attempt to use it with a 020 or higher cpu, does not support autobooting, unless it is a "A2090A" version which had a booting hack. However it is doubtful if this card can boot or even work under 2.0+.
If I were you I would look for a real SCSI controller (such as the A2091).
