From owner-freebsd-fs@FreeBSD.ORG Thu Mar 10 23:29:08 2011 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 9F78E1065676; Thu, 10 Mar 2011 23:29:08 +0000 (UTC) (envelope-from smckay@internode.on.net) Received: from ipmail06.adl6.internode.on.net (ipmail06.adl6.internode.on.net [150.101.137.145]) by mx1.freebsd.org (Postfix) with ESMTP id AE27B8FC2A; Thu, 10 Mar 2011 23:29:07 +0000 (UTC) X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AvsEAOfreE120DXi/2dsb2JhbACmMnjBRIViBA Received: from ppp118-208-53-226.lns20.bne1.internode.on.net (HELO dungeon.home) ([118.208.53.226]) by ipmail06.adl6.internode.on.net with ESMTP; 11 Mar 2011 09:59:05 +1030 Received: from dungeon.home (localhost [127.0.0.1]) by dungeon.home (8.14.3/8.14.3) with ESMTP id p2ANSmnn002180; Fri, 11 Mar 2011 09:28:48 +1000 (EST) (envelope-from mckay) Message-Id: <201103102328.p2ANSmnn002180@dungeon.home> From: Stephen McKay To: Doug Barton References: <201103081425.p28EPQtM002115@dungeon.home> <201103091241.p29CfUM1003302@dungeon.home> <4D793A46.9090603@FreeBSD.org> In-Reply-To: <4D793A46.9090603@FreeBSD.org> from Doug Barton at "Thu, 10 Mar 2011 12:53:26 -0800" Date: Fri, 11 Mar 2011 09:28:48 +1000 Sender: smckay@internode.on.net Cc: freebsd-fs@freebsd.org, Stephen McKay Subject: Re: Constant minor ZFS 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: Thu, 10 Mar 2011 23:29:08 -0000 On Thursday, 10th March 2011, Doug Barton wrote: >On 03/09/2011 04:41, Stephen McKay wrote: >> Of the 12 disks, only 1 has been error-free. I've been doing this for >> about 10 days now and there is no pattern that I can see in the errors. > >Are all the disks from the same batch? If so, you likely got a bad batch. They are all from the same batch, and this "bad batch" idea has gone though my mind too, but we've taken 6 of the disks and built a raidz2 array in a different machine, and this time they seem to be error free. These are the same disks that have already had corruption, according to ZFS, when used in the original machine. Apart from the obvious (that everything changed), the major change in my eyes is that the other box (a Dell PowerEdge 840) runs the disks at SATA1 speed, not SATA3. There's no way to set these drives to run at 1.5Gb/s via jumpers or I'd put them straight back in the main box and test them. Is there a way to tell FreeBSD to run disks at a slower transfer rate? I've not seen any switches or tunables that apply with the mps driver. Cheers, Stephen.