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Date:      Fri, 18 Dec 1998 15:41:22 -0700 (MST)
From:      "Kenneth D. Merry" <ken@plutotech.com>
To:        searle@longacre.demon.co.uk (Michael Searle)
Cc:        freebsd-scsi@FreeBSD.ORG
Subject:   Re: Is this error as important as it looks: HARDWARE FAILURE asc:44,0
Message-ID:  <199812182241.PAA81790@panzer.plutotech.com>
In-Reply-To: <Marcel-1.46-1218210541-b49cjo5@longacre.demon.co.uk> from Michael Searle at "Dec 18, 98 09:05:41 pm"

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Michael Searle wrote...
> On Fri 18 Dec, Kenneth D. Merry wrote:
> 
> > 
> > You might want to check and see if it is running too hot.  Here's a script
> > that might do that, depending on whether your firmware supports it.  (I've
> > tried it on the 18G version of that drive, with firmware version 03B0, and
> > it works fine.)
> > 
> > ========================================
> > #!/bin/ksh
> > 
> > TEMPC=`camcontrol cmd -n da -u 1 -c "4D 0 76 0 0 0 0 0 20 0" -i 32 "s9 i1"`
> > 
> > TEMPF=`echo " 2 k $TEMPC 9 * 5 / 32 + p" | dc`
> > 
> > echo "The temperature is: $TEMPF F"
> > ========================================
> > 
> > I think the default temperature threshold (before it starts spewing errors)
> > is 60C.  Ideally, though, you'll want to run a good bit cooler than that.
> > 
> > You'll need to change the '-u 1' above to '-u 0' for your drive.
> > 
> > Ken
> 
> Is this a general SCSI command that could be used on anything, or specific to
> IBM drives / that model?

It is specific to certain firmware revisions of certain IBM drives that
have on-board temperature sensors.  (No, I don't know which firmware
revisions.  You'll have to try it and find out, if your drive has a
temperature sensor.)

Ken
-- 
Kenneth Merry
ken@plutotech.com

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