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From: Peter Dufault <dufault@hda>
Message-Id: <199605161350.JAA10014@hda>
Subject: Re: using scsi(8)
To: wilko@yedi.iaf.nl (Wilko Bulte)
Date: Thu, 16 May 1996 09:50:07 -0400 (EDT)
Cc: FreeBSD-hackers@FreeBSD.org
In-Reply-To: <199605131902.VAA01472@yedi.iaf.nl> from "Wilko Bulte" at May 13, 96 09:02:31 pm
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> 
> Hi there
> 
> I'm figgling around with the scsi(8) command to get LOG PAGES info from
> my DLT drive. It should be possible to get quite a lot of info from the
> drive in this way.
> 
> My problem is that the scsi(3) man page that describes the arguments
> that scsi(8) can use is more or less incomprehensible to me :(

Sorry - I should probably revisit it since I've been away from it for
a while and it could be a lot clearer.

> Especially the part about the _fmt_ parameters (which are quite essential
> to my efforts) I can't seem to figure out.

Take a look at "sbin/scsi_format/scsi_format.sh" in -current
where it dumps out a mode page, and also the mode page data
base in /usr/share/misc/scsi_modes where everything inside the
curly brace associated with a mode page index is a decode descriptor:

> # Peripheral Device Page:
> 0x09	{
> 	{Interface Identifier} i2
> 	{Reserved} *i1
> 	{Reserved} *i1
> 	{Reserved} *i1
> 	{Reserved} *i1
> }

This will dump out the first 2-byte integer field swapped into the
right order.

-- 
Temporarily via "hdalog@zipnet.net"...

Peter Dufault               Real-Time Machine Control and Simulation
HD Associates, Inc.         Voice: 508 433 6936
dufault@hda.com             Fax:   508 433 5267