In message <v0311070cb1da3bce5bd0@[205.243.213.22]>, Eric Damien Berna writes:
>As far as I can tell, the 2930 is an Ultra SCSI card and the 2940 is an
>Ultra Wide SCSI card. The 2930 uses an 8bit data bus and the 2940 can use a
>16bit bus, therefore the 2940 can achieve up to twice the throughput. The
>2940 is overkill for anything but high speed Ultra Wide SCSI drives. I have
>three 2940s controlling high speed RAID 0 arrays on workstations for photo
>editing on the network I manage. Adaptec even offers a 2940U2W that is an
>Ultra 2 Wide adaptor that can get 80 MB per second transfer rates. Now that
>would be fast (where's the company check book? :) ).

I don't know anything about the 2930, but this is not quite correct.

The 2940 comes in both Ultra and Ultra Wide versions-- the 2940U and
2940UW, repsectively.  There are also non-Ultra Narrow and Wide
versions-- the 2940 and 2940W.  The straight 2940 is just Fast SCSI-2.