From owner-freebsd-fs@FreeBSD.ORG Wed Sep 29 16:43:07 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 92E6B1065673 for ; Wed, 29 Sep 2010 16:43:07 +0000 (UTC) (envelope-from martin@lispworks.com) Received: from lwfs1-cam.cam.lispworks.com (mail.lispworks.com [193.34.186.230]) by mx1.freebsd.org (Postfix) with ESMTP id 327FD8FC1D for ; Wed, 29 Sep 2010 16:43:06 +0000 (UTC) Received: from higson.cam.lispworks.com (IDENT:U2FsdGVkX1/DDsrOp/fc0hHDkudR8RwKYqZIPzbTCBA@higson [192.168.1.7]) by lwfs1-cam.cam.lispworks.com (8.14.3/8.14.3) with ESMTP id o8TGh4Sg094770; Wed, 29 Sep 2010 17:43:04 +0100 (BST) (envelope-from martin@lispworks.com) Received: from higson.cam.lispworks.com by higson.cam.lispworks.com (8.13.1) id o8TGh41B016652; Wed, 29 Sep 2010 17:43:04 +0100 Received: (from martin@localhost) by higson.cam.lispworks.com (8.13.1/8.13.1/Submit) id o8TGh4hx016649; Wed, 29 Sep 2010 17:43:04 +0100 Date: Wed, 29 Sep 2010 17:43:04 +0100 Message-Id: <201009291643.o8TGh4hx016649@higson.cam.lispworks.com> From: Martin Simmons To: freebsd-fs@freebsd.org In-reply-to: <707981.30589.qm@web110702.mail.gq1.yahoo.com> (message from Scott Johnson on Tue, 28 Sep 2010 17:01:47 -0700 (PDT)) References: <707981.30589.qm@web110702.mail.gq1.yahoo.com> Subject: Re: zfs+smb checksum errors 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: Wed, 29 Sep 2010 16:43:07 -0000 >>>>> On Tue, 28 Sep 2010 17:01:47 -0700 (PDT), Scott Johnson said: > > I've been running FBSD 8.0-rel and now 8.1-rel for 6 months or so, with a 4 disk > raidz, weekly scrubs. Never saw a checksum error until last week when I got > about 5 during operation, followed by another 10 or so on the next scrub. > > They all occurred when I was accessing the server through SMB from my WinXP > desktop. I've been doing this for months, transferring files to and from > regularly, but this was the first time I'd been doing simultaneous heavy reading > & writing. > > I was running Imgburn on WinXP, creating an iso file from folders. Both source > files and destination iso file were on the same SMB share on the FBSD server. > > After all the checksum errors, there was 1 unrecoverable error, on one of the > destination iso files. > > There are 0 read errors, 0 write errors, and 0 new SMART errors on the 4 disks. > The checksum errors were spread roughly equally across the 4 disks. All of which > leads me to believe this is a software problem at the filesystem level. Or maybe it is some other hardware problem, such as the disk controller or RAM? __Martin