From owner-freebsd-stable@FreeBSD.ORG Mon Jan 10 06:13:58 2011 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 73D50106564A for ; Mon, 10 Jan 2011 06:13:58 +0000 (UTC) (envelope-from tvijlbrief@gmail.com) Received: from mail-qw0-f54.google.com (mail-qw0-f54.google.com [209.85.216.54]) by mx1.freebsd.org (Postfix) with ESMTP id 207448FC16 for ; Mon, 10 Jan 2011 06:13:57 +0000 (UTC) Received: by qwj9 with SMTP id 9so18698818qwj.13 for ; Sun, 09 Jan 2011 22:13:57 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:sender:received :in-reply-to:references:date:x-google-sender-auth:message-id:subject :from:to:cc:content-type:content-transfer-encoding; bh=hprUh5WtZ2G5e0DDoWxB2UwFhF5KhwP88Nfv5POZjGM=; b=uHJs4ysx5S+42Rj/fmHoqIYuav8NwwbqfLtn26CtqoANEZWk9oYWjFWK0cCLxZtab4 poa+GIE5i8GnMAe2lA1wa6YJW9opTquS/7uiSIitaB2OBjVt3Dr3MhzTVRvdOq5/5muS bUutos3ZuXr8Vkg+C+ExBnQw/mUi/XR47YBOI= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type :content-transfer-encoding; b=CJtfNdH6XbSStISzsWrHgveOfGFBIdDbVww92fI+vfN1Ty5OYINznxrpwGwjKUXzeV uqUfU/DGwgIdadbrUX4RHi8wt45SCAC63MuvxZmGsXv90+/S98S40xz4hq976COSUyMg ttprwlai3DHdqILFW/w6i+ZwBcAwIQ7/CNA2M= MIME-Version: 1.0 Received: by 10.229.250.135 with SMTP id mo7mr24771186qcb.30.1294640037270; Sun, 09 Jan 2011 22:13:57 -0800 (PST) Sender: tvijlbrief@gmail.com Received: by 10.229.50.209 with HTTP; Sun, 9 Jan 2011 22:13:57 -0800 (PST) In-Reply-To: <20110109163027.GA42562@icarus.home.lan> References: <20110109122243.GA37530@icarus.home.lan> <20110109163027.GA42562@icarus.home.lan> Date: Mon, 10 Jan 2011 07:13:57 +0100 X-Google-Sender-Auth: ntptgSjCl-xWVN0qOCxKWGqXp0g Message-ID: From: Tom Vijlbrief To: Jeremy Chadwick Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: freebsd-stable@freebsd.org Subject: Re: Panic 8.2 PRERELEASE WRITE_DMA48 X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 10 Jan 2011 06:13:58 -0000 2011/1/9 Jeremy Chadwick : > > Not to get off topic, but what is causing this? =A0It looks like you have > a cron job or something very aggressive doing a "smartctl -t short > /dev/ad4" or equivalent. =A0If you have such, please disable this > immediately. =A0You shouldn't be doing SMART tests with such regularity; > it accomplishes absolutely nothing, especially the "short" tests. =A0Let > the drive operate normally, otherwise run smartd and watch logs instead. > I have this default entry (from the author of that file) in smartd.conf and enabled it on many machines over the years. Is it a bad practice? # First (primary) ATA/IDE hard disk. Monitor all attributes, enable # automatic online data collection, automatic Attribute autosave, and # start a short self-test every day between 2-3am, and a long self test # Saturdays between 3-4am. /dev/hda -a -o on -S on -s (S/../.././02|L/../../6/03) Thanks for all your feedback