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From: Tom Goessi <goessi@ife.ee.ethz.ch>
Newsgroups: comp.periphs.scsi
Subject: Re: Differences between SCSI-2 & Wide SCSI & Ultra SCSI & Ultra Wide SCSI... etc...
Date: Wed, 19 Feb 1997 20:25:04 +0100
Organization: Swiss Federal Institute of Technology (ETHZ)
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References: <32ff8947.414346078@news.pureatria.com> <Pine.LNX.3.95.970218111013.3112C-100000@wilma.ifas.ufl.edu>
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To: Mike Kutyna <kutyna@wilma.ifas.ufl.edu>

Mike Kutyna wrote:
> 
> see http://www.cis.ohio-state.edu/hypertext/faq/usenet/scsi-faq/top.html
> 
> its the comp.periphs.scsi faq.  It will answer all of your questions...
> 
> Mike K.
> 
> On Mon, 10 Feb 1997, Scott Chapman wrote:
> 
> > Sorry if this is a FAQ, but I couldn't find any good information on
> > it. What are the differences between the different SCSI specs? I
> > know/heard of:
> >       SCSI-2
> >       SCSI-3
> >       Fast SCSI
> >       Wide SCSI
> >       Ultra SCSI
> >       Ultra Wide SCSI
> >
> > I am sure some of these are really duplicates but what are they
> > specifically?
> >
> > Scott.
> >
> >

Fast SCSI-2:      8bit wide, 50 pin connector, 10 MB/s max data transfer
Wide SCSI-2:     16bit wide, 68 pin connector, 20 MB/s max data transfer
Ultra SCSI :      8bit wide, 50 pin connector, 20 MB/s max data transfer
Ultra Wide SCSI: 16bit wide, 68 pin connector, 40 MB/s max datatransfer

Some manufacterers call Ultra-SCSI as SCSI-3, but only some points
of the Ultra-SCSI specs and SCSI-3 specs are identical. SCSI-3 has
more specs.

	Tom