Path: utzoo!attcan!uunet!lll-winken!ncis.llnl.gov!ncis!helios.ee.lbl.gov!pasteur!ucbvax!decwrl!labrea!polya!kaufman
From: kaufman@polya.Stanford.EDU (Marc T. Kaufman)
Newsgroups: comp.sys.mac
Subject: Re: Apple HD80SC... Quantum ???
Message-ID: <6178@polya.Stanford.EDU>
Date: 18 Jan 89 02:35:01 GMT
References: <19105@agate.BERKELEY.EDU> <8400055@m.cs.uiuc.edu>
Reply-To: kaufman@polya.Stanford.EDU (Marc T. Kaufman)
Organization: Stanford University
Lines: 22

In article <8400055@m.cs.uiuc.edu> gillies@m.cs.uiuc.edu writes:

>I was under the impression that "Apple SCSI" is not the same as
>"REAL-WORLD SCSI", just like "Apple Nubus" is not the same as
>"REAL-WORLD Nubus" (notice a pattern?)  I don't see the point of
>adopting a standard, if you pervert it for your own evil
>purposes....Apple!

Not quite fair.  Apple SCSI is a ("proper" [sic]) subset of SCSI.  It doesn't
(currently) support some extensions, such as disconnect/reselect.  In general,
though, any SCSI device can be driven on the bus.  I HAVE noticed that disk
sellers often do something "unique" in the ROMs with respect to INQUIRY
commands, or supported SCSI commands (Supermac used to use a non-standard
"Write" command), so that the formatter/manager programs could not be used to
initialize other drives, or so that a program (e.g. LaserSpool.df) could tell
if it was being run from a certain manufacturer's drive.  I am not sure just
why they do it, unless it is from a certain egocentric view that, somehow,
their driver software is "better" than others, and by god, if you are going
to use their driver it had better be on their disk!  Seems silly to me, but
I don't have to report to the Chairman of the Board.

Marc Kaufman (kaufman@polya.stanford.edu)