It's a single circuit board, on a frame that
mounts in a half height 5 1/4" bay. The
face has a little two line LCD, and some buttons and lights. The board itself is made by
CMD.
Seems to be model CSB-2200/SDS.
A slightly later iteration of CMD RAID controller (note that this is, in the true SCSI
sense,
a "controller" and not a "host adapter with smarts") has a bit more
condensed
packaging and very similar user interface:
http://cgi.ebay.com/CMD-CRD-5440-RAID-Controller-Device-P-N-CRD-005440-304-…
Chronology: CRD-5440 was late 90's. I'm guessing the one you have is an earlier
iteration, early 90's?
Tim.