From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bruce Allen Subject: Re: regarding crazy head unloads Date: Sat, 13 Sep 2008 06:44:09 -0500 (CDT) Message-ID: References: <48361F88.7040400@gmail.com> Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Return-path: Received: from gc.phys.uwm.edu ([129.89.61.147]:49279 "EHLO gc.phys.uwm.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752498AbYIMMut (ORCPT ); Sat, 13 Sep 2008 08:50:49 -0400 In-Reply-To: <48361F88.7040400@gmail.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Tejun Heo Cc: roland.kletzing@materna.de, Smartmontools Developers List , IDE/ATA development list , Jeff Garzik , Mark Lord , Alan Cox , scott@ubuntu.com Hi Tejun, Sorry, this is a really really slow reply. This email came at an unusually busy time and I did not reply before it got buried in the deluge. > 2. This is from Roland. Make smartd aware of the problem and warn user > if load/unload count per powered on hours goes too high. Maybe the > warning can direct the user to linux-ata.org page? It would be easy to implement this in smartd. But I'm concerned about three things: -- most people don't run smartd (I think by default it is off on the main Linux distros). Those wise enough to run smartd will probably be aware of the issue, since it's gotten lots of buzz. And even if smartd is turned on in the distro it is normally not configured to send warning emails. -- I'm not sure if the attribute used for head load/unload is a standard one. On my current laptop Hitachi disk it is attribute 193. Does anyone know if this is standard? -- I'm not sure at what threshold to send warning emails. If we send too many false alarms, they will be ignored by users. Let me know if you have suggestions or comments about these points. Cheers, Bruce