Hiya
I'm sure the floppy problem is a jumper on the motherboard. External floppy drives on A3000 should begin df2:
Check the motherboard manual or online for where the jumper is located.
The scsi problem could be a faulty 08 chip
I assume since your using the accelerator you have the INT2 fix on your motherboard? or maybe the accelerator has this interrupt line fixed in its own design?
If not.. do the INT2 fix and see if the new 08 scsi chip works correctly
Az
