this sonnet tempo 66 is based on the acard 6280m (or is more similar to)
I have been using 2 cards from Sonnet called ATA 66. They both are ACARD build, one older that came with my G3 was a PCI ULTRA ATA66, AEC-62
60M rev 1.3 worked ok as SCSI on OS9, but is now dead.
I have been testing this week another Tempo Ultra ATA66. That Card is ACARD build too. But it drops the M at the end, normally used to point at Mac compatible models. Just AEC-62
60.
That card is seen under OS9, Panther and Leopard as SCSI. But only mounts volumes on OS9 and Panther. It also limits the drives to 120 or 128 Gigs.
So, this card do not allow hardware RAID AFAIK. But it could use
software RAID. IIO told me once SCSI were an advantage vs onboard ATA because you could monitor disk transfers.
Also the Mac OS9 software RAID seems to demand SCSI...