From: Andreas Dilger Subject: Re: INFO: task jbd2/dm-0-8:3993 blocked for more than 120 seconds Date: Wed, 17 Aug 2011 08:35:14 -0600 Message-ID: <96850198-2253-40F7-B99C-62A6097278FA@dilger.ca> References: <4E4BC296.1040004@mageia.org> Mime-Version: 1.0 (iPhone Mail 8L1) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8BIT Cc: "linux-kernel@vger.kernel.org" , "linux-ext4@vger.kernel.org" To: Thomas Backlund Return-path: Received: from shawmail.shawcable.com ([64.59.128.220]:9643 "EHLO mail.shawcable.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753970Ab1HQOek convert rfc822-to-8bit (ORCPT ); Wed, 17 Aug 2011 10:34:40 -0400 In-Reply-To: <4E4BC296.1040004@mageia.org> Sender: linux-ext4-owner@vger.kernel.org List-ID: On 2011-08-17, at 7:31 AM, Thomas Backlund wrote: > > One of our buildnodes, a 8-core Supermicro X7DA8 system, > and a WDC WD1002FAEX-0 sata disk hits the "blocked for more than 120 seconds" several times, and ends up resetting the ata bus. > > The disk does not report any errors with smart, and we have the same model in a 24-core Supermicro X8DTN, and it does not show this problem. > > ata3.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen > ata3.00: failed command: FLUSH CACHE EXT > ata3.00: cmd ea/00:00:00:00:00/00:00:00:00:00/a0 tag 0 > res 40/00:00:01:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout) > ata3.00: status: { DRDY } > ata3: soft resetting link > ata3.00: configured for UDMA/133 > ata3.00: retrying FLUSH 0xea Emask 0x4 > ata3: EH complete This is a problem with your disk hardware. Cheers, Andreas