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Date: Tue, 20 Jan 2004 10:44:54 -0700
From: "Kenneth D. Merry" <ken@kdm.org>
To: Mark Terribile <materribile@yahoo.com>
Message-ID: <20040120174454.GA13828@panzer.kdm.org>
References: <20040120164830.39726.qmail@web21108.mail.yahoo.com>
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cc: scsi@freebsd.org
Subject: Re: Does this document (also) describe FreeBSD SCSI?
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On Tue, Jan 20, 2004 at 08:48:30 -0800, Mark Terribile wrote:
> Hi,
> 
> This document:
> 
> http://www.cs.arizona.edu/computer.help/policy/DIGITAL_unix/AA-PS3GD-TET1_html/camosf2.html
> 
> claims to describe the SCSI subsystem in ``Digital UNIX'' but it looks a lot
> like
> FreeBSD.  Does anyone know if there is a genetic relationship, or how reliable
> a
> guide it is?

FreeBSD and DEC UNIX/Tru64 have both implemented the ANSI CAM spec.

Thus the reason that DEC's implementation looks a lot like the FreeBSD SCSI
layer.  (They're based on the same spec.)

The spec is here:

http://www.t10.org/ftp/t10/drafts/cam/cam-r12b.pdf

So the DEC CAM paper may be somewhat applicable to FreeBSD, but certainly not
100% applicable.

Ken
-- 
Kenneth Merry
ken@kdm.org