From owner-freebsd-current@FreeBSD.ORG Thu Mar 26 03:42:13 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 8414F1065700 for ; Thu, 26 Mar 2009 03:42:13 +0000 (UTC) (envelope-from kevinxlinuz@163.com) Received: from m12-11.163.com (m12-11.163.com [220.181.12.11]) by mx1.freebsd.org (Postfix) with SMTP id C53228FC14 for ; Thu, 26 Mar 2009 03:42:12 +0000 (UTC) (envelope-from kevinxlinuz@163.com) Received: from [127.0.0.1] (unknown [60.191.86.3]) by smtp7 (Coremail) with SMTP id C8CowLA7_1KC+cpJn5QsLQ--.1621S2; Thu, 26 Mar 2009 11:41:55 +0800 (CST) Message-ID: <49CAF98C.8000209@163.com> Date: Thu, 26 Mar 2009 11:42:04 +0800 From: kevin User-Agent: Thunderbird 2.0.0.21 (Windows/20090302) MIME-Version: 1.0 To: ticso@cicely.de References: <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> <20090325180054.L87213@rust.salford.ac.uk> <20090325183831.GD16409@cicely7.cicely.de> In-Reply-To: <20090325183831.GD16409@cicely7.cicely.de> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-CM-TRANSID: C8CowLA7_1KC+cpJn5QsLQ--.1621S2 X-Coremail-Antispam: 1Uf129KBjvJXoWxJr1fJFWkZrWfZF1ruw13XFb_yoW8CrW7pF WftF4vkF4kJFW3AFZFkw10kay7tr4ftFy0g3sY9ryUuw1Y9F9aq343Kay5CrWj9F48Kw1r AFZrAa48Ga4qv3DanT9S1TB71UUUUUUv73VFW2AGmfu7bjvjm3AaLaJ3UjIYCTnIWjp_UU UeW7k042IE42xK82IY6r43WwAYjxAI6xAIw28IcVAK0I8IjxAxM7k042IE4IxYO2xFxVAq jxCEw4Av424lb7Iv0xC_JF4lb4IE77IF4wAFF20E14v26r1j6r4UM7C26xCjj4IEI4klw4 CSwwAFxVCaYxvI4VCIwcAKzIAtM7CIcVAFz4kK6r1j6r18M28EF7xvwVC0I7IYx2IY67AK xVWDJVCq3wA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxVW0oVCq3wA2z4x0Y4vEx4A2jsIE14 v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oVCq3wAawVAYYI1S6c8GOVWUur45 Jryln4vEF7Iv6F18KVAqrcv_XVWUtr1rJF1lnx0Ec2IEnICE548m6r1DJrWUZwAqx4xG64 xvF2IEw4CE5I8CrVC2j2WlYx0E2Ix0cI8IcVAFwI0_Jr0_Jr4lYx0Ex4A2jsIE14v26r4j 6F4UM4x0Y48IcVAKI48JM4IEnf9ElVAFpTB2q-sK649IAas0WaI_GwCjxxvEw4Wlc2xSY4 AK67AK6r48MxkI7II2jI8vz4v_Cr0_Zr1l42xK82IYc2Ij64vIr41l4x8a6c8ajcxJMI8E 67AF67kF1VAFwI0_JF0_Jw1lIxkGc2Ij64vIr4UvcSsGvfC2KfnxnUUI43ZEXa7xRR9NV7 UUUUU== X-CM-SenderInfo: pnhyx0x0ol03r26rljoofrz/ Cc: Alexander Leidinger , 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 List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 26 Mar 2009 03:42:13 -0000 Bernd Walter wrote: > On Wed, Mar 25, 2009 at 06:04:08PM +0000, Mark Powell wrote: > >> 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? >> > > WC is on, prefetch is off, but only because it had bad performance with > MySQL. > Drives are Serial ATA II > I don't know if it is with the drives, but other reasons are less > likely in my opinion. > The system is located in a data center and since I only get a few errors > I decided to live with it and not to debug it further. > > I don't think it is drivers related.I tested on both ata2-master SATA150 and ata2-master SATA150. loader.conf zfs_load="YES" vm.kmem_size_max="2048M" vm.kmem_size="2048M" Thanks, Kevin