Ancient disk controllers - test-drb@ccmp.vtda.org

19 Apr 1999

On Apr 19,  5:58, Eric Smith wrote:

...
  SCSI-1 added arbitration (for multiple initiators),
disconnects (and
 reselection), and the 10-byte commands (to support larger devices).  I'm not
...
  sure whether SASI supported the message phase; that
may also be a SCSI-1
 innovation. 
It didn't; messages first appeared in SCSI-1.

...
  Usually a SASI host can deal with SCSI disk drives. 
Sometimes a SCSI
 host can deal with SASI targets, as long as it restricts itself to the
 SASI commands. 
Some old SCSI hosts can, but most modern ones expect to use messages.

-- 

Pete						Peter Turnbull
						Dept. of Computer Science
						University of York