From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marc MERLIN Subject: Load cycle and spin down software fixup for WD20EADS and other drives Date: Mon, 20 Jun 2011 08:35:29 -0700 Message-ID: <20110620153529.GG21438@merlins.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from magic.merlins.org ([209.81.13.136]:43572 "EHLO mail1.merlins.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751317Ab1FTPfc (ORCPT ); Mon, 20 Jun 2011 11:35:32 -0400 Received: from merlin by mail1.merlins.org with local (Exim 4.72 #1) id 1QYgVd-0007Zc-Db for ; Mon, 20 Jun 2011 08:35:29 -0700 Content-Disposition: inline Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: linux-ide@vger.kernel.org For the list archives (or the wiki if someone can update it), I should post a fix I wrote years ago for two problems with those WD green drives (a few others are affected too). wdidle3 is required to tweak some firmware bits that stop the heads from parking every 8 seconds on linux. And then the drives will not properly spin down on a timeout like most drives will hdparm -S 12 As sad as it is, I wrote a small daemon that checks disk access with iostat and manually spins the drives down if needed: http://marc.merlins.org/perso/linux/post_2010-08-03_Spinning-Down-WD20EADS-Drives-and-Fixing-Load-Cycle.html http://marc.merlins.org/linux/scripts/swdisksusp Hope this helps someone Marc -- "A mouse is a device used to point at the xterm you want to type in" - A.S.R. Microsoft is to operating systems .... .... what McDonalds is to gourmet cooking Home page: http://marc.merlins.org/