Date: Thu, 26 Mar 2009 11:42:04 +0800 From: kevin <kevinxlinuz@163.com> To: ticso@cicely.de Cc: Alexander Leidinger <Alexander@Leidinger.net>, FreeBSD Current <freebsd-current@freebsd.org>, Mark Powell <M.S.Powell@salford.ac.uk>, Daniel Eriksson <daniel@toomuchdata.com> Subject: Re: Apparently spurious ZFS CRC errors (was Re: ZFS data error without reasons) Message-ID: <49CAF98C.8000209@163.com> In-Reply-To: <20090325183831.GD16409@cicely7.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>
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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 <WDC WD3200AAKS-00SBA0/12.01B01> 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 <Seagate ST9320320AS SD03> ata2-master SATA150 and <FUJITSU MHW2160BH PL 0084001E> ata2-master SATA150. loader.conf zfs_load="YES" vm.kmem_size_max="2048M" vm.kmem_size="2048M" Thanks, Kevin
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