From owner-freebsd-mobile@FreeBSD.ORG Wed Oct 31 15:46:41 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 6F22F16A417 for ; Wed, 31 Oct 2007 15:46:41 +0000 (UTC) (envelope-from vova@sw.ru) Received: from relay.sw.ru (mailhub.sw.ru [195.214.233.200]) by mx1.freebsd.org (Postfix) with ESMTP id D82D813C494 for ; Wed, 31 Oct 2007 15:46:40 +0000 (UTC) (envelope-from vova@sw.ru) Received: from vbook.fbsd.ru (swsoft-msk-nat.sw.ru [195.214.232.10]) by relay.sw.ru (8.13.4/8.13.4) with ESMTP id l9VEF0BL004166 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Wed, 31 Oct 2007 17:15:01 +0300 (MSK) Received: from vova by vbook.fbsd.ru with local (Exim 4.68 (FreeBSD)) (envelope-from ) id 1InELU-000P69-8a for freebsd-mobile@freebsd.org; Wed, 31 Oct 2007 17:15:00 +0300 From: Vladimir Grebenschikov To: freebsd-mobile Content-Type: text/plain Content-Transfer-Encoding: 7bit Organization: SWsoft Date: Wed, 31 Oct 2007 17:14:59 +0300 Message-Id: <1193840099.95027.16.camel@localhost> Mime-Version: 1.0 X-Mailer: Evolution 2.10.3 FreeBSD GNOME Team Port Sender: Vladimir Grebenschikov Subject: 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 15:46:41 -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) -- Vladimir B. Grebenschikov SWsoft Inc. vova@swsoft.com