From owner-freebsd-questions@FreeBSD.ORG Mon Sep 5 18:56:22 2005 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 4D69216A41F for ; Mon, 5 Sep 2005 18:56:22 +0000 (GMT) (envelope-from michael@araneidae.co.uk) Received: from mail.araneidae.co.uk (araneidae.co.uk [62.3.233.233]) by mx1.FreeBSD.org (Postfix) with ESMTP id 366DC43D45 for ; Mon, 5 Sep 2005 18:56:20 +0000 (GMT) (envelope-from michael@araneidae.co.uk) Received: from saturn.araneidae.co.uk (localhost [127.0.0.1]) by mail.araneidae.co.uk (8.13.1/8.13.1) with ESMTP id j85IuJ54017894 for ; Mon, 5 Sep 2005 18:56:19 GMT (envelope-from michael@araneidae.co.uk) Received: from localhost (michael@localhost) by saturn.araneidae.co.uk (8.13.1/8.13.1/Submit) with ESMTP id j85IuJXb017891 for ; Mon, 5 Sep 2005 18:56:19 GMT (envelope-from michael@araneidae.co.uk) X-Authentication-Warning: saturn.araneidae.co.uk: michael owned process doing -bs Date: Mon, 5 Sep 2005 18:56:19 +0000 (GMT) From: Michael Abbott To: FreeBSD Questions In-Reply-To: <20050905171912.GF67960@sentinelchicken.net> Message-ID: <20050905172827.U17621@saturn.araneidae.co.uk> References: <20050905151332.P16924@saturn.araneidae.co.uk> <20050905171912.GF67960@sentinelchicken.net> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Subject: Re: Hard disk woes X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 05 Sep 2005 18:56:22 -0000 On Mon, 5 Sep 2005, Jason Morgan wrote: > On Mon, Sep 05, 2005 at 03:16:13PM +0000, Michael Abbott wrote: >> I'm having some very odd behaviour from one of my hard disks and I wonder >> what anybody makes of it. >> >> In brief, the hard disk in questions works just fine much of the time, but >> when high volume data transfers are requested I get the following in >> /var/log/messages: >> >> Sep 3 15:21:02 saturn /kernel: ad6: READ command timeout tag=0 serv=0 - >> resetting > I had a very similar problem a while back. After replacing the drive in > question, then replacing the motherboard, I discovered it was a power > issue. The power supply was freaking out at medium to high loads, which > was causing the device to continually reset. Well, I hope that's not it. I'm encouraged to think not: - the problem seems to be tied to one particular hard disk and I presently run with four hard disks - the system has operated trouble free for three years - my memory is that it was a good quality power supply. I don't really see how I'd diagnose a power supply problem, but as I say, the hard disk in question is the only part with problems.