From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vincenzo Ciancia Subject: Re: One drive which perform frequent head unloads under Linux Date: Mon, 29 Sep 2008 14:18:46 +0200 Message-ID: <1222690726.26716.11.camel@frattaglia> References: <1222334079.13537.2.camel@frattaglia> <48E09581.8010504@kernel.org> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: Received: from horus.di.unipi.it ([131.114.3.13]:34702 "EHLO mailserver.di.unipi.it" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751596AbYI2MTH (ORCPT ); Mon, 29 Sep 2008 08:19:07 -0400 In-Reply-To: <48E09581.8010504@kernel.org> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Tejun Heo Cc: linux-ide@vger.kernel.org On lun, 2008-09-29 at 17:44 +0900, Tejun Heo wrote: > Vincenzo Ciancia wrote: > > Hi, I own a toshiba m400 and I already had to replace a disk in less > > than one year (luckily, it was covered by warranty). I noticed that > > Load_Cycle_Count was indeed increasing. Using hdparm -B 255 fixes it, > > but also 254 seems to fix it (and I guess it is better to have some > > power management than none at all?). > > > > I am not subscribed to the list so if you need more information just ask > > me. I followed instructions at > > > > http://ata.wiki.kernel.org/index.php/Known_issues#How_to_determine_whether_a_machine_has_this_problem > > I just updated the page. Can you please read the updated part (which is > in bold) and post how much the load cycle count increases per hour > without any adjustment? The problem is that now I don't know what is the default (I also found no way to read the -B setting with hdparm). I tried with hdparm -B 128 which seems adviced by many for laptops, and I get 130 cycles per hour. Vincenzo Ciancia