From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757473Ab2JAVdY (ORCPT ); Mon, 1 Oct 2012 17:33:24 -0400 Received: from ozy.pierre-beck.de ([178.63.78.113]:46790 "EHLO ozy.pierre-beck.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752563Ab2JAVdX (ORCPT ); Mon, 1 Oct 2012 17:33:23 -0400 Message-ID: <506A0BFB.60606@pierre-beck.de> From: Pierre Beck User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:15.0) Gecko/20120907 Thunderbird/15.0.1 MIME-Version: 1.0 To: Nix CC: Chris Murphy , Linux RAID , linux-kernel@vger.kernel.org Subject: Re: Areca hardware RAID / first-ever SCSI bus reset: am I about to lose this disk controller? References: <87mx0lsv4d.fsf@spindle.srvr.nix> <87r4pslpau.fsf@spindle.srvr.nix> In-Reply-To: <87r4pslpau.fsf@spindle.srvr.nix> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Original-Recipients: nix@esperi.org.uk, lists@colorremedies.com, linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org X-Original-Date: Mon, 01 Oct 2012 23:32:43 +0200 Date: Mon, 01 Oct 2012 23:33:15 +0200 X-Spam-Notice: Unscanned Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Check the SMART values of the disks if possible. Watch for command timeouts and the usual bad sector stuff. I've had similar issues with Adaptec controllers. Bad disks seem to cause havoc. The outstanding operation isn't answered within [SCSI Timeout, default 30, /sys/block/sdX/device/timeout] seconds, so Linux performs a loop reset, eventually resetting the controller. That means between 60 and 120 seconds of zero I/O operation, varying between controllers and disk array sizes. It's particularly annoying when in RAID and the disk could've simply been kicked within few seconds. Something that needs improvement IMHO. On 23.09.2012 17:42, Nix wrote: > On 19 Sep 2012, Chris Murphy outgrape: > >> On Sep 19, 2012, at 12:52 PM, Nix wrote: >> >>> So I have this x86-64 server running Linux 3.5.1 with a SATA-on-PCIe >>> Areca 1210 hardware RAID-5 controller >> Did you find this? Same controller family. Weird that this just shows >> up now, but perhaps instead of it being "bad hardware" out the gate, >> something's happened to it and now it's failing as you suspect. > Hm, it's possible I suppose. Just as possible that a disk is dying. > > > It looks to have been a one-off transient -- no recurrence yet, touch > wood :) >