From owner-freebsd-questions@FreeBSD.ORG  Fri Apr 14 20:18:08 2006
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
X-Original-To: freebsd-questions@freebsd.org
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 8F5DE16A417
	for <freebsd-questions@freebsd.org>;
	Fri, 14 Apr 2006 20:18:08 +0000 (UTC)
	(envelope-from bigby@ephemeron.org)
Received: from dsl.ephemeron.org (dsl092-035-072.lax1.dsl.speakeasy.net
	[66.92.35.72]) by mx1.FreeBSD.org (Postfix) with ESMTP id D929B43D49
	for <freebsd-questions@freebsd.org>;
	Fri, 14 Apr 2006 20:18:07 +0000 (GMT)
	(envelope-from bigby@ephemeron.org)
Received: from home.ephemeron.org (root@home.fake.net [10.0.2.3])
	by dsl.ephemeron.org (8.12.11/8.12.11) with ESMTP id k3EKI71F015928;
	Fri, 14 Apr 2006 13:18:07 -0700 (PDT)
	(envelope-from bigby@ephemeron.org)
Received: from home.ephemeron.org (bigby@localhost [127.0.0.1])
	by home.ephemeron.org (8.13.4/8.13.4) with ESMTP id k3EKI7s7085238;
	Fri, 14 Apr 2006 13:18:07 -0700 (PDT)
	(envelope-from bigby@ephemeron.org)
Received: from localhost (bigby@localhost)
	by home.ephemeron.org (8.13.4/8.13.4/Submit) with ESMTP id
	k3EKI6YX085235; Fri, 14 Apr 2006 13:18:07 -0700 (PDT)
	(envelope-from bigby@ephemeron.org)
X-Authentication-Warning: home.ephemeron.org: bigby owned process doing -bs
Date: Fri, 14 Apr 2006 13:18:06 -0700 (PDT)
From: Bigby Findrake <bigby@ephemeron.org>
To: Garrett Cooper <youshi10@u.washington.edu>
In-Reply-To: <443FF97B.6000303@u.washington.edu>
Message-ID: <20060414130832.Y81702@home.ephemeron.org>
References: <443F5CE6.4080107@u.washington.edu>
	<20060414091338.GY44921@wantadilla.lemis.com>
	<443FF97B.6000303@u.washington.edu>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
Cc: freebsd-questions@freebsd.org
Subject: Re: Determining whether or not a SCSI disk is in use
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 14 Apr 2006 20:18:08 -0000

On Fri, 14 Apr 2006, Garrett Cooper wrote:

> Yes. Recently accessed or is being accessed.
> -Garrett

Well, for a shell-script-hack, which (i) requires no new kernel and (ii) 
could be fairly portable but (iii) could conceivably miss some activity, 
you could do something like the following:

#!/bin/sh

DISKDEV=da0
SHUTDOWN_COMMAND="camcontrol stop 0,1,0"
SECONDS=60

# check for activity
# watch iostat for $SECONDS seconds for anything

iostat -d $DISKDEV 1 5 | awk ' NR>2 && $2>0 { print "x" } ' |\
grep x > /dev/null

STATUS=$?

if [ $STATUS -eq 0 ]
then

 	# there was activity,
 	$SHUTDOWN_COMMAND
fi


/-------------------------------------------------------------------------/
You always miss 100% of the chances you never take.

                    finger://bigby@ephemeron.org
                   http://www.ephemeron.org/~bigby/
                   irc://irc.ephemeron.org/#the_pub
                 news://news.ephemeron.org/alt.lemurs
/-------------------------------------------------------------------------/