Date   : Tue, 06 Jul 2004 22:45:35 +0100 (BST)
From   : Pete Turnbull <pete@...>
Subject: Re: Acorn Winchester unit

On Jul 6, 19:34, Jules Richardson wrote:
> On Tue, 2004-07-06 at 17:58, Pete Turnbull wrote:
> > I have the manuals for the ACB4000 and X1410A,
>
> Hmm. I've got the Xebec S1410 one.

Oops, typo alert.  I meant S1410A, not X1410A.

> (I've still not found anyone who can say what the difference between
> SCSI and SASI is - is SASI just SCSI before the days of the common
> command set, or are there other differences in the protocol?)

*SCSI* is SCSI before CCS.  CCS was developed about the same time the
SCSI standard was ratified, but wasn't incorporated into the standard
until SCSI-2.  The ACB4000 manual says a few things about SASI vs SCSI.
 One difference is the ATN line, not present in SASI.  I don't think
SASI had a notion of disconnection/reconnection (optional in SCSI-1),
and I thin SCSI is more strict about implementation of certain commands
being mandatory.  However, I've never read a genuine SASI spec, and
wouldn't consider myself an expert on the fine details of SCSI either,
s I'm not sure what other differences might exist.

-- 
Pete                                           Peter Turnbull
                                               Network Manager
                                               University of York