From owner-freebsd-stable@FreeBSD.ORG Thu Dec 9 05:24:42 2004 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id D897716A4CE for ; Thu, 9 Dec 2004 05:24:42 +0000 (GMT) Received: from lp1001.snu.ac.kr (lp1001.snu.ac.kr [147.46.70.11]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4A40E43D45 for ; Thu, 9 Dec 2004 05:24:42 +0000 (GMT) (envelope-from spamrefuse@yahoo.com) Received: from [147.46.44.181] (cisr.snu.ac.kr [147.46.44.181]) (authenticated (0 bits)) by lp1001.snu.ac.kr (8.13.1/8.11.6) with ESMTP id iB95MUJ1018752 for ; Thu, 9 Dec 2004 14:22:30 +0900 Message-ID: <41B7E193.4090807@yahoo.com> Date: Thu, 09 Dec 2004 14:24:35 +0900 From: Rob User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.7.3) Gecko/20041113 X-Accept-Language: en-us, en MIME-Version: 1.0 To: freebsd-stable@freebsd.org Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Subject: hw.ata.ata_dma="0": can I do this during bootup at the loader prompt? X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 09 Dec 2004 05:24:43 -0000 Hi, In /boot/loader.conf, I have hw.ata.ata_dma="0" to prevent a WRITE_DMA failure crash at bootup. Unfortunately, this forces my UDMA100 harddisk to operate at PIO4 speed. There are patches flying around on this mailing list that might solve the problem. I'm very keen on testing such patches, but I should remove the line in loader.conf. However, if the patch does not work, I end up with an unbootable disk. It would be nice if I can set hw.ata.ata_dma="0" at the loader prompt during bootup, so that the system at least will boot from harddisk. Is that possible? Thanks, Rob.