From owner-freebsd-mobile@FreeBSD.ORG Wed Oct 31 17:44:18 2007 Return-Path: Delivered-To: freebsd-mobile@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id ADC1B16A41B for ; Wed, 31 Oct 2007 17:44:18 +0000 (UTC) (envelope-from Tad1214@aol.com) Received: from imr-m06.mx.aol.com (imr-m06.mx.aol.com [64.12.138.200]) by mx1.freebsd.org (Postfix) with ESMTP id 5B96113C4A6 for ; Wed, 31 Oct 2007 17:44:18 +0000 (UTC) (envelope-from Tad1214@aol.com) Received: from imo-d22.mx.aol.com (imo-d22.mail.aol.com [172.18.157.196]) by imr-m06.mx.aol.com (v107.10) with ESMTP id RELAYIN6-74728b3b9373; Wed, 31 Oct 2007 12:56:25 -0400 Received: from Tad1214@aol.com by imo-d22.mx.aol.com (mail_out_v38_r9.3.) id n.c01.22c68265 (37254) for ; Wed, 31 Oct 2007 12:29:54 -0400 (EDT) Received: from [192.168.1.181] (mail.gertens.com [68.178.61.59]) by cia-ma07.mx.aol.com (v120.9) with ESMTP id MAILCIAMA074-91864728ad7fb5; Wed, 31 Oct 2007 12:29:52 -0400 Message-ID: <4728AD90.50604@aol.com> Date: Wed, 31 Oct 2007 11:30:08 -0500 From: Tom Donnelly User-Agent: Thunderbird 2.0.0.6 (Windows/20070728) MIME-Version: 1.0 To: freebsd-mobile@freebsd.org References: <1193840099.95027.16.camel@localhost> In-Reply-To: <1193840099.95027.16.camel@localhost> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-AOL-IP: 172.18.157.196 X-Mailer: Unknown (No Version) X-Spam-Flag: NO Subject: Re: Potential hardware issue with too often HDD heads parking X-BeenThere: freebsd-mobile@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Mobile computing with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 31 Oct 2007 17:44:18 -0000 > Hi > > Probably does not related to FreeBSD, but anybody may confirm that > FreeBSD laptops are not affected ? > > https://launchpad.net/bug59695.html > > >> When switching to battery power, /etc/acpi/power.sh issues the command >> hdparm -B 1 to all block devices. This leads to extremely frequent >> load cycles. For example, my new thinkpad has already done well over >> 7000 load cycles -- in only 100 hours. That's at least one unloading >> per minute. Googling for "load unload cycles notebook OR laptop" shows >> that most laptop drives handle up to 600,000 such cycles. As these >> values clearly show, this issue is of high importance and should be >> fixed sooner rather than later. >> >> Please see for yourself how often your drive is load cycling: >> smartctl -d ata -a /dev/sda >> (This command is for an SATA drive; you'll need to install the >> smartmontools package first.) >> >> See also http://paul.luon.net/journal/hacking/BrokenHDDs.html for a >> rather dramatic account of the effects the current default values may >> have. >> >> Just in case the load/unload timeout depends on the specific laptop or >> disk model, here are my system specifications: >> ThinkPad Z60m & Hitachi HTS541080G9SA00 disk (80GB) >> > > >