Date: Wed, 25 Mar 2009 18:04:08 +0000 (GMT) From: "Mark Powell" <M.S.Powell@salford.ac.uk> To: ticso@cicely.de Cc: Alexander Leidinger <Alexander@Leidinger.net>, FreeBSD Current <freebsd-current@freebsd.org>, Daniel Eriksson <daniel@toomuchdata.com>, Mark Powell <M.S.Powell@salford.ac.uk>, kevin <kevinxlinuz@163.com> Subject: Re: Apparently spurious ZFS CRC errors (was Re: ZFS data error without reasons) Message-ID: <20090325180054.L87213@rust.salford.ac.uk> In-Reply-To: <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> <20090325152940.GB16409@cicely7.cicely.de>
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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
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