From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: [smartmontools-support] SATA drive reset/disable events on ICH7 ata_piix when polling SMART info Date: Mon, 08 Feb 2010 11:40:58 +0900 Message-ID: <4B6F79BA.6010003@kernel.org> References: <4B6C2635.105@buttersideup.com> <4B6C2BC8.7000609@buttersideup.com> <4B6C91F3.5090809@teksavvy.com> <4B6CE473.7060901@kernel.org> <4B6D8A12.70200@buttersideup.com> <4B6DA74C.2040007@teksavvy.com> <4B6DEBA7.2030505@buttersideup.com> <4B6E46DA.9040308@teksavvy.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: Received: from hera.kernel.org ([140.211.167.34]:37096 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753414Ab0BHCfA (ORCPT ); Sun, 7 Feb 2010 21:35:00 -0500 In-Reply-To: <4B6E46DA.9040308@teksavvy.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Mark Lord Cc: Tim Small , Justin Piszcz , "smartmontools-support@lists.sourceforge.net" , linux-ide@vger.kernel.org Hello, On 02/07/2010 01:51 PM, Mark Lord wrote: > Tim Small wrote: >> Mark Lord wrote: >>> My theory on the problem when I first had it here, was that doing >>> a FLUSH_CACHE[_EXT] before any PIO command (eg. SMART) should prevent >>> the problem. This was never explored further (by me or others). >>> >> >> Would using "option libata force=pio4" be a simple way to start to test >> this hypothesis? > .. > > Yup. If the hypothesis is FALSE, then you'll still see trouble. > Otherwise, it *might* be correct. ;) But that would be a big *might*. The effect of PIO is a bit too drastic to indicate postivity (as opposed to ruling out stuff). Anyways, yeap, no harm in trying. -- tejun