From owner-freebsd-current@FreeBSD.ORG Sun Feb 10 20:26:30 2013 Return-Path: Delivered-To: current@freebsd.org Received: from mx1.freebsd.org (mx1.FreeBSD.org [8.8.178.115]) by hub.freebsd.org (Postfix) with ESMTP id 3CE73C17 for ; Sun, 10 Feb 2013 20:26:30 +0000 (UTC) (envelope-from hans@beastielabs.net) Received: from mail.beastielabs.net (beasties.demon.nl [82.161.3.114]) by mx1.freebsd.org (Postfix) with ESMTP id B8F8ACF for ; Sun, 10 Feb 2013 20:26:28 +0000 (UTC) Received: from merom.hotsoft.nl (merom.hotsoft.nl [192.168.0.12]) by mail.beastielabs.net (8.14.5/8.14.5) with ESMTP id r1AKQQ2Q098090; Sun, 10 Feb 2013 21:26:26 +0100 (CET) (envelope-from hans@beastielabs.net) Message-ID: <51180272.8040802@beastielabs.net> Date: Sun, 10 Feb 2013 21:26:26 +0100 From: Hans Ottevanger User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:17.0) Gecko/20130129 Thunderbird/17.0.2 MIME-Version: 1.0 To: Poul-Henning Kamp Subject: Re: Time to kill fdc ? References: <79955.1360494404@critter.freebsd.dk> <9EDF355D-07F7-4315-B00E-B181C674D763@gsoft.com.au> <80113.1360496675@critter.freebsd.dk> <5117A0CD.6060904@beastielabs.net> <80625.1360508147@critter.freebsd.dk> In-Reply-To: <80625.1360508147@critter.freebsd.dk> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Cc: current@freebsd.org X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 10 Feb 2013 20:26:30 -0000 On 02/10/13 15:55, Poul-Henning Kamp wrote: > Content-Type: text/plain; charset=ISO-8859-1 > -------- > In message <5117A0CD.6060904@beastielabs.net>, Hans Ottevanger writes: >> On 02/10/13 12:46, Daniel O'Connor wrote: > >> But I just did an experiment on an old Pentium 4 system here, using the >> fdc driver and 8.3-STABLE as of early December (r243900). I read several >> diskettes using "dd /dev/fd0 /dev/null" and everything went flawlessly. > > Could you try: > > dd if=/dev/fd0 of=/dev/null bs=1048576 > Tried this, 20 times in a row, without any failures. Did the same for dd if=/dev/fd0 of=/tmp/junk bs=1048576 again without failures. As stated before, this is on an old Pentium 4, now updated to 8.3-STABLE r246624. What hardware are you using? Maybe I can reproduce that panic if I can find similar hardware in my "collection". > That consistently exploded 7.x and 8.x here yesterday... > > (I used recoverdisk, but that's not material) > >> Could it be that the drive that Poul-Henning is using is worn out a bit? > > No, that's not it. It's (amongst other things) ISA-DMA being > børken (try something different that /dev null btw :-) and bounce > buffers for same panicking the system. > Kind regards, Hans