From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: 'Device not ready' issue on mpt2sas since 3.1.10 Date: Tue, 17 Jul 2012 11:09:32 -0700 Message-ID: <20120717180932.GB2878@google.com> References: <4FE454CA.6080007@matthiasprager.de> <4FFAED4F.3080100@matthiasprager.de> <4FFB32E5.1050109@farcaster.org> <4FFB7354.8040809@matthiasprager.de> <4FFB8A86.7000009@farcaster.org> <4FFCBA4C.4000502@farcaster.org> <4FFD6F3D.2030708@matthiasprager.de> <4FFD8410.7050604@matthiasprager.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mail-pb0-f46.google.com ([209.85.160.46]:57059 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756140Ab2GQSJh (ORCPT ); Tue, 17 Jul 2012 14:09:37 -0400 Received: by pbbrp8 with SMTP id rp8so1149934pbb.19 for ; Tue, 17 Jul 2012 11:09:36 -0700 (PDT) Content-Disposition: inline In-Reply-To: <4FFD8410.7050604@matthiasprager.de> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Matthias Prager Cc: Robert Trace , linux-scsi@vger.kernel.org, Jens Axboe Hello, On Wed, Jul 11, 2012 at 03:48:00PM +0200, Matthias Prager wrote: > I just tested kernel version 3.4.4 without commit > 85ef06d1d252f6a2e73b678591ab71caad4667bb and it also works fine (beware > of commit 62d3c5439c534b0e6c653fc63e6d8c67be3a57b1 as it conflicts with > reverting 85ef06d1d252f6a2e73b678591ab71caad4667bb). > > I'm trying to understand why this commit leads to the issue of i/o > failing on spun down drives, in hopes of being able to fix it. Meanwhile > maybe Tejun Heo (author of the commit) or Jens Axboe (the committer) are > able to shed some light on this (I've included them in the CC list). Nothing rings a bell for me. How does it fail? The only thing it change is when and which media check commands are issued. Thanks. -- tejun