From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Lord Subject: Re: [smartmontools-support] SATA drive reset/disable events on ICH7 ata_piix when polling SMART info Date: Sat, 06 Feb 2010 23:51:38 -0500 Message-ID: <4B6E46DA.9040308@teksavvy.com> 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> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from ironport2-out.teksavvy.com ([206.248.154.181]:43904 "EHLO ironport2-out.pppoe.ca" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753759Ab0BGEvl (ORCPT ); Sat, 6 Feb 2010 23:51:41 -0500 In-Reply-To: <4B6DEBA7.2030505@buttersideup.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Tim Small Cc: Tejun Heo , Justin Piszcz , "smartmontools-support@lists.sourceforge.net" , linux-ide@vger.kernel.org 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. ;)