From owner-freebsd-acpi@FreeBSD.ORG  Tue Nov  1 19:44:20 2005
Return-Path: <owner-freebsd-acpi@FreeBSD.ORG>
X-Original-To: freebsd-acpi@freebsd.org
Delivered-To: freebsd-acpi@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 9A63A16A41F
	for <freebsd-acpi@freebsd.org>; Tue,  1 Nov 2005 19:44:20 +0000 (GMT)
	(envelope-from oberman@es.net)
Received: from postal1.es.net (postal1.es.net [198.128.3.205])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 64AF643D46
	for <freebsd-acpi@freebsd.org>; Tue,  1 Nov 2005 19:44:20 +0000 (GMT)
	(envelope-from oberman@es.net)
Received: from ptavv.es.net ([198.128.4.29])
	by postal1.es.net (Postal Node 1) with ESMTP (SSL) id IBA74465;
	Tue, 01 Nov 2005 11:44:17 -0800
Received: from ptavv (localhost [127.0.0.1])
	by ptavv.es.net (Tachyon Server) with ESMTP id 1F23B5D07;
	Tue,  1 Nov 2005 11:44:16 -0800 (PST)
To: Nate Lawson <nate@root.org>
In-reply-to: Your message of "Sun, 30 Oct 2005 22:49:04 PST."
	<4365BE60.9050405@root.org> 
Date: Tue, 01 Nov 2005 11:44:16 -0800
From: "Kevin Oberman" <oberman@es.net>
Message-Id: <20051101194416.1F23B5D07@ptavv.es.net>
Cc: freebsd-acpi@freebsd.org, Joe Holden <joe@joeholden.co.uk>
Subject: Re: ACPI (?) Power management features - Query 
X-BeenThere: freebsd-acpi@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: ACPI and power management development <freebsd-acpi.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-acpi>,
	<mailto:freebsd-acpi-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-acpi>
List-Post: <mailto:freebsd-acpi@freebsd.org>
List-Help: <mailto:freebsd-acpi-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-acpi>,
	<mailto:freebsd-acpi-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 01 Nov 2005 19:44:20 -0000

> Date: Sun, 30 Oct 2005 22:49:04 -0800
> From: Nate Lawson <nate@root.org>
> Sender: owner-freebsd-acpi@freebsd.org
> 
> Joe Holden wrote:
> > Firstly, Hello all!
> > 
> > Does FreeBSD (5.x, 7) support power management features such as powering 
> > down the hard disks when they aren't in use, such as windows is able to do?
> > 
> > If i 've missed something on the acpi www, or manual, feel free to 
> > abuse/flame/beat me with a stick.
> 
> man atacontrol

Feel free to point out that I am wrong, but I don't think atacontrol has
the capability to do that at this time. You can detach a disk, but this
will not power it down immediately. And it makes the disk disappear from
the system which, if it's mounted, is likely to induce a crash.

Matthew Dodd has a tool that does do this called atautil. Until
atacontrol or something else grows support for powering a disk down, I
think you will probably need it.

You can Google for it or look in the mail archives.
-- 
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman@es.net			Phone: +1 510 486-8634