From owner-freebsd-fs@FreeBSD.ORG Tue Jan 26 16:04:40 2010 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id B1F941065693 for ; Tue, 26 Jan 2010 16:04:40 +0000 (UTC) (envelope-from bfriesen@simple.dallas.tx.us) Received: from blade.simplesystems.org (blade.simplesystems.org [65.66.246.74]) by mx1.freebsd.org (Postfix) with ESMTP id 7ABB08FC12 for ; Tue, 26 Jan 2010 16:04:40 +0000 (UTC) Received: from freddy.simplesystems.org (freddy.simplesystems.org [65.66.246.65]) by blade.simplesystems.org (8.13.8+Sun/8.13.8) with ESMTP id o0QG4d1a028899; Tue, 26 Jan 2010 10:04:39 -0600 (CST) Date: Tue, 26 Jan 2010 10:04:39 -0600 (CST) From: Bob Friesenhahn X-X-Sender: bfriesen@freddy.simplesystems.org To: Xin LI In-Reply-To: Message-ID: References: <419976.64363.qm@web110515.mail.gq1.yahoo.com> User-Agent: Alpine 2.01 (GSO 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.2 (blade.simplesystems.org [65.66.246.90]); Tue, 26 Jan 2010 10:04:39 -0600 (CST) Cc: freebsd-fs@freebsd.org Subject: Re: ZFS - scrub lead to corruption? X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 26 Jan 2010 16:04:40 -0000 On Mon, 25 Jan 2010, Xin LI wrote: >> 16) scrub continues to over 75% (I wasn't watching for the exact #) >> and then *panic* level 12 > > Do you have console access to the server? Try setting up a crash dump > and see if you can obtain a backtrace? > > By the way, 'zpool status -x' may give some information that is useful. Since scrub automatically re-starts after system reboots, it should help to use 'zpool scrub -s pool' immediately after boot (assuming there is enough time to do a console login) to stop the existing scrub. This may defer the panic enough to figure out what is going wrong. I used to get system panics here (Solaris 10) during scrub, but it was eventually determined that a flaky fiber channel card was to blame. Two systems paniced here during 'zfs scrub' and both times it was due to problems with an adaptor card. Bob -- Bob Friesenhahn bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/