i have one of these with the original 1.11 BIOS from 1994 and while 4 and 8 GB drives are seemingly detected fine, the machine would lock up every time when trying to boot from a floppy, then would boot fine when unplugging the hard drive, so i'm assuming there's a size limitation. given the popularity of these i'm slightly baffled at the lack of information online, though; beyond the mention of >1GB support in its BIOS config (to be expected given what was out in 1994, i suppose), i could not find any mention anywhere what exactly the size limit on this thing is, and there's no mention of what the 1.16 BIOS does either, beyond stating not to use the 1.23 BIOS on older cards without autoterm, anyway.

a 2 gig limit seems a bit disappointing given these probably weren't the cheapest controllers in their day, and bigger drives were rapidly appearing...