I use a Quantum Atlas 10k III SCSI hard drive with a 68 pin to 50 pin on a A4000 with a A4091 SCSI card and it works without any problems.
I also used the same drive using a CyberstormPPC, without the adapter of course, before I fried the board due to my incompetence, and it worked flawlessly.
I got my adapter at
The Mate Company
