From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: Intermittent SATA link down SStatus 0 Date: Thu, 15 Jul 2010 11:20:03 +0200 Message-ID: <4C3ED2C3.9050907@kernel.org> References: <4B5D26EF.4030709@kernel.org> <12193ff15b0deef3609ea93f54e5b485.squirrel@thechecks.ca> <13096cdf5e0e6704e30364a746e60467.squirrel@thechecks.ca> <8276efbfebcbfc3e58033ab8d5996d9d.squirrel@thechecks.ca> <4C3DACFF.2060504@kernel.org> <0d9ccbbb9ed0fb46dc9497888cd92c6e.squirrel@thechecks.ca> <4C3E4A04.5030000@kernel.org> <6cb5020f769580a1f431ed5bb8709b6a.squirrel@thechecks.ca> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from hera.kernel.org ([140.211.167.34]:49319 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932850Ab0GOJUI (ORCPT ); Thu, 15 Jul 2010 05:20:08 -0400 In-Reply-To: <6cb5020f769580a1f431ed5bb8709b6a.squirrel@thechecks.ca> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Paul Check Cc: linux-ide@vger.kernel.org Hello, On 07/15/2010 02:43 AM, Paul Check wrote: > Ok, well we didn't have to wait long. Once again one of my drives failed > to appear. This time it was a different drive than the times before. > > I have attached the output from dmesg. Can you tell me from this output > what the problem is? SStatus and SControl are behaving erratically. I'm not yet sure why that's happening yet. [ 2.562157] ata4.01: SATA link up (SStatus 300 SControl 123) Hmm... it looks like SStatus and SControl are swapped here. Maybe there's a race condition in SIDPR code. I'll look into it a bit more. Thanks. -- tejun