On other threads I have documented my experiences with scsi2sd C6. On A2091 with 14mhz hack and GuruROM, was able to get consistent txfer rates of 2.9mb/sec across zii bus to a gvp 40mhz 030 combo card. The combo card onboard scsi was not as fast, believe it or not.
Now I am using the same a2091 setup with a pp&s a2000/040@33mhz., So my txfer rates dropped to around 1.85mb/sec.
