From owner-freebsd-fs@FreeBSD.ORG Fri Apr 20 00:41:34 2007 Return-Path: X-Original-To: fs@freebsd.org Delivered-To: freebsd-fs@FreeBSD.ORG Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 942B016A404 for ; Fri, 20 Apr 2007 00:41:34 +0000 (UTC) (envelope-from rick@kiwi-computer.com) Received: from kiwi-computer.com (keira.kiwi-computer.com [63.224.10.3]) by mx1.freebsd.org (Postfix) with SMTP id 9E67213C4BD for ; Fri, 20 Apr 2007 00:41:33 +0000 (UTC) (envelope-from rick@kiwi-computer.com) Received: (qmail 67576 invoked by uid 2001); 20 Apr 2007 00:41:31 -0000 Date: Thu, 19 Apr 2007 19:41:31 -0500 From: "Rick C. Petty" To: Antony Mawer Message-ID: <20070420004131.GA65715@keira.kiwi-computer.com> References: <20070418104155.GA31727@eschew.pusen.org> <86hcrdlqak.fsf@dwp.des.no> <20070418144103.GB31727@eschew.pusen.org> <20070418155156.GB20441@keira.kiwi-computer.com> <20070418180200.GA32061@eschew.pusen.org> <86odlku5xg.fsf@dwp.des.no> <20070419173316.GA57227@keira.kiwi-computer.com> <4627EC02.8070103@nokia.com> <4627F7BE.5090606@mawer.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4627F7BE.5090606@mawer.org> User-Agent: Mutt/1.4.2.1i Cc: piso@freebsd.org, fs@freebsd.org Subject: Re: ZFS + replacing failing hard-drive. X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: rick-freebsd@kiwi-computer.com List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 20 Apr 2007 00:41:34 -0000 On Fri, Apr 20, 2007 at 09:14:06AM +1000, Antony Mawer wrote: > > Just another "me too". I've seen (S)ATA-related problems on 6.x (mostly > 6.0) based machines, in some cases these appear to have been physical > drive errors, but I haven't been able to verify each individual case. I > don't know if quality control is sorely lacking on newer SATA drives or > if it's something else... it has caused me to question whether or not > there might be a driver/OS level issue... I'm reluctant to point fingers at the drives (although this is often a good first guess).. I have access to a few dozen disks from two separate SATA batches. I've noticed that when the identical drives are on the same Promise controller, FreeBSD reports DMA timeouts occasionally. I've never seen anything similar on Ubuntu, although since the timeouts are unpredictable it's possible there may be throughput differences between the two OSes. -- Rick C. Petty