From owner-freebsd-current@FreeBSD.ORG Thu Mar 26 13:23:46 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 3E05F10656F6 for ; Thu, 26 Mar 2009 13:23:46 +0000 (UTC) (envelope-from M.S.Powell@salford.ac.uk) Received: from relay0.salford.ac.uk (relay0.salford.ac.uk [146.87.0.10]) by mx1.freebsd.org (Postfix) with SMTP id 98A4E8FC1D for ; Thu, 26 Mar 2009 13:23:45 +0000 (UTC) (envelope-from M.S.Powell@salford.ac.uk) Received: (qmail 43389 invoked by uid 98); 26 Mar 2009 13:23:44 -0000 Received: from 146.87.255.121 by relay0.salford.ac.uk (envelope-from , uid 401) with qmail-scanner-2.01 (clamdscan: 0.94.2/9169. spamassassin: 3.2.4. Clear:RC:1(146.87.255.121):. Processed in 0.051419 secs); 26 Mar 2009 13:23:44 -0000 Received: from rust.salford.ac.uk (HELO rust.salford.ac.uk) (146.87.255.121) by relay0.salford.ac.uk (qpsmtpd/0.3x.614) with SMTP; Thu, 26 Mar 2009 13:23:44 +0000 Received: (qmail 78405 invoked by uid 1002); 26 Mar 2009 13:23:42 -0000 Received: from localhost (sendmail-bs@127.0.0.1) by localhost with SMTP; 26 Mar 2009 13:23:42 -0000 Date: Thu, 26 Mar 2009 13:23:42 +0000 (GMT) From: "Mark Powell" To: Peter Jeremy In-Reply-To: <20090326101303.GJ56137@server.vk2pj.dyndns.org> Message-ID: <20090326132022.W64065@rust.salford.ac.uk> References: <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> <20090326101303.GJ56137@server.vk2pj.dyndns.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: FreeBSD Current , ticso@cicely.de 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 13:23:46 -0000 On Thu, 26 Mar 2009, Peter Jeremy wrote: > On 2009-Mar-25 16:29:40 +0100, Bernd Walter 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'll second this. Whilst stress-testing ZFS, I've managed to wedge a > Samsung drive to the point where it needed a power-cycle to recover > (HD103UJ 1AA01112 if anyone wants to know what to avoid). Thanks for the info. I have one of those and was wondering about how it'd perform with zfs. As an aside, do you have any drive recommendations? Or is 'reliable zfs performance on consumer SATA drives' an oxymoron? :( 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