From owner-freebsd-current@FreeBSD.ORG Wed Mar 25 15:30:02 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 085801065676 for ; Wed, 25 Mar 2009 15:30:02 +0000 (UTC) (envelope-from ticso@cicely7.cicely.de) Received: from raven.bwct.de (raven.bwct.de [85.159.14.73]) by mx1.freebsd.org (Postfix) with ESMTP id 619F48FC12 for ; Wed, 25 Mar 2009 15:30:00 +0000 (UTC) (envelope-from ticso@cicely7.cicely.de) Received: from cicely5.cicely.de ([10.1.1.7]) by raven.bwct.de (8.13.4/8.13.4) with ESMTP id n2PFTjwa011173 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Wed, 25 Mar 2009 16:29:45 +0100 (CET) (envelope-from ticso@cicely7.cicely.de) Received: from cicely7.cicely.de (cicely7.cicely.de [10.1.1.9]) by cicely5.cicely.de (8.14.2/8.14.2) with ESMTP id n2PFTgRH077641 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 25 Mar 2009 16:29:42 +0100 (CET) (envelope-from ticso@cicely7.cicely.de) Received: from cicely7.cicely.de (localhost [127.0.0.1]) by cicely7.cicely.de (8.14.2/8.14.2) with ESMTP id n2PFTfuO021033; Wed, 25 Mar 2009 16:29:41 +0100 (CET) (envelope-from ticso@cicely7.cicely.de) Received: (from ticso@localhost) by cicely7.cicely.de (8.14.2/8.14.2/Submit) id n2PFTefg021032; Wed, 25 Mar 2009 16:29:40 +0100 (CET) (envelope-from ticso) Date: Wed, 25 Mar 2009 16:29:40 +0100 From: Bernd Walter To: Alexander Leidinger Message-ID: <20090325152940.GB16409@cicely7.cicely.de> 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> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090325152128.2389990h7v6a02co@webmail.leidinger.net> X-Operating-System: FreeBSD cicely7.cicely.de 7.0-STABLE i386 User-Agent: Mutt/1.5.11 X-Spam-Status: No, score=-4.4 required=5.0 tests=ALL_TRUSTED=-1.8, AWL=0.030, BAYES_00=-2.599 autolearn=ham version=3.2.5 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on spamd.cicely.de Cc: kevin , FreeBSD Current , Mark Powell , Daniel Eriksson 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 Reply-To: ticso@cicely.de 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 15:30:02 -0000 On Wed, Mar 25, 2009 at 03:21:28PM +0100, Alexander Leidinger wrote: > Quoting Mark Powell (from Wed, 25 Mar 2009 > 13:49:07 +0000 (GMT)): > > >On Wed, 25 Mar 2009, Alexander Leidinger wrote: > > >>NCQ is not supported yet in FreeBSD. Alexander Motin said he is > >>interested in implementing it, but I don't know about the status of > >>this. > > > >Ok. So vfs.zfs.vdev.max_pending is irrelevant for SATA currently? > > Cheers. > > Either that or it needs to be lowered. I don't know. 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 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. -- B.Walter http://www.bwct.de Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.