From owner-freebsd-current@FreeBSD.ORG Wed Mar 25 18:04:12 2009 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 715891065670 for ; Wed, 25 Mar 2009 18:04:12 +0000 (UTC) (envelope-from M.S.Powell@salford.ac.uk) Received: from airy.salford.ac.uk (airy.salford.ac.uk [146.87.0.11]) by mx1.freebsd.org (Postfix) with SMTP id D4B248FC15 for ; Wed, 25 Mar 2009 18:04:11 +0000 (UTC) (envelope-from M.S.Powell@salford.ac.uk) Received: (qmail 82475 invoked by uid 98); 25 Mar 2009 18:04:10 +0000 Received: from 146.87.255.121 by airy.salford.ac.uk (envelope-from , uid 401) with qmail-scanner-2.01 (clamdscan: 0.94.2/9165. spamassassin: 3.2.4. Clear:RC:1(146.87.255.121):. Processed in 0.093305 secs); 25 Mar 2009 18:04:10 -0000 Received: from rust.salford.ac.uk (HELO rust.salford.ac.uk) (146.87.255.121) by airy.salford.ac.uk (qpsmtpd/0.3x.614) with SMTP; Wed, 25 Mar 2009 18:04:10 +0000 Received: (qmail 99109 invoked by uid 1002); 25 Mar 2009 18:04:08 -0000 Received: from localhost (sendmail-bs@127.0.0.1) by localhost with SMTP; 25 Mar 2009 18:04:08 -0000 Date: Wed, 25 Mar 2009 18:04:08 +0000 (GMT) From: "Mark Powell" To: ticso@cicely.de In-Reply-To: <20090325152940.GB16409@cicely7.cicely.de> Message-ID: <20090325180054.L87213@rust.salford.ac.uk> References: <49BD117B.2080706@163.com> <4F9C9299A10AE74E89EA580D14AA10A635E68A@royal64.emp.zapto.org> <49BE4EC1.90207@163.com> <20090320102824.W75873@rust.salford.ac.uk> <20090320152737.D641@rust.salford.ac.uk> <20090325105613.55624rkkgf2xkr6s@webmail.leidinger.net> <20090325103721.G67233@rust.salford.ac.uk> <20090325135528.21416hzpozpjst8g@webmail.leidinger.net> <20090325125930.U73916@rust.salford.ac.uk> <20090325152128.2389990h7v6a02co@webmail.leidinger.net> <20090325152940.GB16409@cicely7.cicely.de> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: Alexander Leidinger , FreeBSD Current , Daniel Eriksson , Mark Powell , kevin Subject: Re: Apparently spurious ZFS CRC errors (was Re: ZFS data error without reasons) X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 25 Mar 2009 18:04:12 -0000 On Wed, 25 Mar 2009, Bernd Walter wrote: > On Wed, Mar 25, 2009 at 03:21:28PM +0100, Alexander Leidinger wrote: > I wouldn't be surprised if the problem is in the drive firmware. > Preread and wc both have the potential to put a lot load to the drives > and can trigger bugs that otherwise wouldn't matter. I've emailed WD support for more info. Not expecting much though. >From reading other threads on these Green Power drives them seem rather crap. This is my model and firmware: http://www.datacent.com/datarecovery/hdd/western_digital/WD10EADS-00L5B1 There's some head park problem too, but with 5s ZFS sync I don't think it applies in this case: http://www.silentpcreview.com/forums/viewtopic.php?t=51401&postdays=0&postorder=asc&start=120&sid=a1caf68d80ef8fecc5d9e86defde4c19 http://kerneltrap.org/mailarchive/linux-kernel/2008/4/9/1386304 > I also have a system running WD drives and ECC RAM which show CRC errors > from time to time, while all other systems have no CRC problem at all. Interesting. Are those CRC problems with WC on or off? Cheers. -- Mark Powell - UNIX System Administrator - The University of Salford Information & Learning Services, Clifford Whitworth Building, Salford University, Manchester, M5 4WT, UK. Tel: +44 161 295 6843 Fax: +44 161 295 5888 www.pgp.com for PGP key