The first time I saw RAID that people could afford (ie. not super computing
centers) was 1993 or so. 

Would it useless to suggest that a RAID board built in 1990 supports
10MB/s SCSI if you are lucky.  And that it likely wouldn't support
disks > 1GB.  And that you can get a modern RAID controller for under
less than 200 US dollars or Euros?

I'd presume you have google'd for it.  Google has lots more info
that this tiny list does.

Quoting Torsten Sadowski (moehl@akaflieg.extern.tu-berlin.de):
> Hi,
> I have a strange piece of hardware which might be a RAID controller. It
> was made by EXSYS-Storage Systems in 1990. It has the size of a 5.25" HD.
> On the board are a 68020, 512k SRAM, 2 SCSI-Controllers with connectors
> and several other chips.