From owner-freebsd-fs@FreeBSD.ORG Sun May 6 15:14:13 2012 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 EFE19106566B for ; Sun, 6 May 2012 15:14:13 +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 B28868FC08 for ; Sun, 6 May 2012 15:14:13 +0000 (UTC) Received: from freddy.simplesystems.org (freddy.simplesystems.org [65.66.246.65]) by blade.simplesystems.org (8.14.4+Sun/8.14.4) with ESMTP id q46Exd1s011128; Sun, 6 May 2012 09:59:40 -0500 (CDT) Date: Sun, 6 May 2012 09:59:39 -0500 (CDT) From: Bob Friesenhahn X-X-Sender: bfriesen@freddy.simplesystems.org To: Simon In-Reply-To: <20120506123826.412881065672@hub.freebsd.org> Message-ID: References: <20120506123826.412881065672@hub.freebsd.org> 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]); Sun, 06 May 2012 09:59:40 -0500 (CDT) Cc: "freebsd-fs@freebsd.org" Subject: Re: ZFS Kernel Panics with 32 and 64 bit versions of 8.3 and 9.0 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: Sun, 06 May 2012 15:14:14 -0000 On Sun, 6 May 2012, Simon wrote: > > Are you suggesting that if a disk sector goes bad or memory corrupts few blocks > of data, the entire zpool is gonna go bust? can the same occur with a ZRAID? > I thought the ZFS was designed to overcome all these issues to begin with. Is > this not the case? ZFS is designed to work with failing disks, but not failing memory. It is recommended to use only systems with ECC memory. The OS itself (any OS!) is succeptible to crash/corruption due to failing memory but without zfs's checksums, you might not be aware of such corruptions or the crash might be more delayed. Bob -- Bob Friesenhahn bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/