From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757284AbZHZKe3 (ORCPT ); Wed, 26 Aug 2009 06:34:29 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757274AbZHZKe0 (ORCPT ); Wed, 26 Aug 2009 06:34:26 -0400 Received: from mx1.redhat.com ([209.132.183.28]:37758 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757263AbZHZKeW (ORCPT ); Wed, 26 Aug 2009 06:34:22 -0400 Message-ID: <4A950FA6.4020408@redhat.com> Date: Wed, 26 Aug 2009 06:34:14 -0400 From: Ric Wheeler User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.1) Gecko/20090814 Fedora/3.0-2.6.b3.fc11 Lightning/1.0pre Thunderbird/3.0b3 MIME-Version: 1.0 To: Andrei Tanas CC: "'NeilBrown'" , linux-kernel@vger.kernel.org Subject: Re: MD/RAID: what's wrong with sector 1953519935? References: <004e01ca25e4$c11a54e0$434efea0$@ca> <9cfb6af689a7010df166fdebb1ef516b.squirrel@neil.brown.name> <4A948A82.4080901@redhat.com> <4A94905F.7050705@redhat.com> <005101ca25f4$09006830$1b013890$@ca> <4A94A0E6.4020401@redhat.com> <005401ca25ff$9ac91cc0$d05b5640$@ca> In-Reply-To: <005401ca25ff$9ac91cc0$d05b5640$@ca> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 08/25/2009 11:45 PM, Andrei Tanas wrote: >>>> I would suggest that Andrei might try to write and clear the IO >>>> >> error >> >>>> at that >>>> offset. You can use Mark Lord's hdparm to clear a specific sector or >>>> just do the >>>> math (carefully!) and dd over it. It the write succeeds (without >>>> bumping your >>>> remapped sectors count) this is a likely match to this problem, >>>> >>> I've tried dd multiple times, it always succeeds, and the relocated >>> >> sector >> >>> count is currently 1 on this drive, even though this particular fault >>> happened at least 3 times so far. >>> >>> >> I would bump that count way up (say to 2) and see if you have an >> issue... >> > Not sure what you mean by this: how can I artificially bump the relocated > sector count? > > Sorry - you need to set the tunable: /sys/block/mdX/md/safe_mode_delay to something like "2" to prevent that sector from being a hotspot... ric