From owner-freebsd-stable@FreeBSD.ORG Mon Oct 20 13:22:11 2008 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 63DD31065671 for ; Mon, 20 Oct 2008 13:22:11 +0000 (UTC) (envelope-from jdc@koitsu.dyndns.org) Received: from QMTA03.westchester.pa.mail.comcast.net (qmta03.westchester.pa.mail.comcast.net [76.96.62.32]) by mx1.freebsd.org (Postfix) with ESMTP id 0E33F8FC1C for ; Mon, 20 Oct 2008 13:22:10 +0000 (UTC) (envelope-from jdc@koitsu.dyndns.org) Received: from OMTA09.westchester.pa.mail.comcast.net ([76.96.62.20]) by QMTA03.westchester.pa.mail.comcast.net with comcast id Uz831a00n0SCNGk531NA5V; Mon, 20 Oct 2008 13:22:10 +0000 Received: from koitsu.dyndns.org ([69.181.141.110]) by OMTA09.westchester.pa.mail.comcast.net with comcast id V1N81a00y2P6wsM3V1N9pn; Mon, 20 Oct 2008 13:22:10 +0000 X-Authority-Analysis: v=1.0 c=1 a=8pif782wAAAA:8 a=QycZ5dHgAAAA:8 a=ep99mPwuTXxZNu8TM98A:9 a=LMO3qCBZmdS0IsKUyBRPjVyUbzEA:4 a=EoioJ0NPDVgA:10 a=LY0hPdMaydYA:10 Received: by icarus.home.lan (Postfix, from userid 1000) id 5C8EAC9432; Mon, 20 Oct 2008 06:22:08 -0700 (PDT) Date: Mon, 20 Oct 2008 06:22:08 -0700 From: Jeremy Chadwick To: JoaoBR Message-ID: <20081020132208.GA3847@icarus.home.lan> References: <200810171530.45570.joao@matik.com.br> <200810200837.40451.joao@matik.com.br> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200810200837.40451.joao@matik.com.br> User-Agent: Mutt/1.5.18 (2008-05-17) Cc: freebsd-stable@freebsd.org Subject: Re: constant zfs data corruption X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 20 Oct 2008 13:22:11 -0000 On Mon, Oct 20, 2008 at 08:37:40AM -0200, JoaoBR wrote: > On Friday 17 October 2008 15:39:59 Chuck Swiger wrote: > > On Oct 17, 2008, at 11:30 AM, JoaoBR wrote: > > > constantly I find data corruption on ZFS volums, ever from rrdtool, > > > this > > > corrupt data happens on SATA disks, never seem on SCSI > > > > Presumably your SATA drives are correctly being reported by ZFS as > > corrupting data, and you should do something like replace cables, the > > drives themselves, perhaps try downgrading to SATA-150 rather than > > -300 if you are using the later. Also consider running a drive > > diagnostic utility from the mfgr (or smartmontools) and doing an > > extended self-test or destructive write surface check. > > > > well, hardware seems to be ok and not older than 6 month, also happens not > only on one machine ... smartctl do not report any hw failures on disk > > regarding jumpering the drives to 150 you suspect a driver problem? It's not because of a driver problem. There are known SATA chipsets which do not properly work with SATA300 (particularly VIA and SiS chipsets); they claim to support it, but data is occasionally corrupted. Capping the drive to SATA150 fixes this problem. http://en.wikipedia.org/wiki/Serial_ATA#SATA_1.5_Gbit.2Fs_and_SATA_3_Gbit.2Fs There are also known problems with Silicon Image chipsets (on Linux, Windows, and FreeBSD). Because you didn't provide your smartctl output, I can't really tell if the drives are in "good shape" or not. :-) Also, do you not think it's a little odd that the only data corruption occurring for you are related to RRDtool? -- | Jeremy Chadwick jdc at parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB |