From owner-freebsd-stable@FreeBSD.ORG Fri Apr 29 06:57:52 2005 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 0656516A4D0 for ; Fri, 29 Apr 2005 06:57:52 +0000 (GMT) Received: from harmony.village.org (rover.village.org [168.103.84.182]) by mx1.FreeBSD.org (Postfix) with ESMTP id 90E5C43D49 for ; Fri, 29 Apr 2005 06:57:51 +0000 (GMT) (envelope-from imp@bsdimp.com) Received: from localhost (warner@rover2.village.org [10.0.0.1]) by harmony.village.org (8.13.3/8.13.1) with ESMTP id j3T6vB8W016729; Fri, 29 Apr 2005 00:57:24 -0600 (MDT) (envelope-from imp@bsdimp.com) Date: Fri, 29 Apr 2005 00:57:49 -0600 (MDT) Message-Id: <20050429.005749.99254012.imp@bsdimp.com> To: bms@spc.org From: "M. Warner Losh" In-Reply-To: <20050427104015.GB5585@empiric.icir.org> References: <20050427104015.GB5585@empiric.icir.org> X-Mailer: Mew version 3.3 on Emacs 21.3 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit cc: freebsd-stable@freebsd.org cc: avleeuwen@gmail.com cc: woodycarey@hotmail.com Subject: Re: VIA M1000 mini-itx system installation woes - WRITE_DMA error - cabling? 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: Fri, 29 Apr 2005 06:57:52 -0000 In message: <20050427104015.GB5585@empiric.icir.org> Bruce M Simpson writes: : On Wed, Apr 27, 2005 at 10:11:16AM +0200, Arjan Van Leeuwen wrote: : > After you've installed the system, insert that line into : > /boot/loader.conf, and load up "atacontrol mode 0 udma33 udma33" as : > early as possible during the boot (try using /etc/rc.early, for : > example) to get it up to speed again. : : Some drives have firmware tweaks downloadable from the manufacturer which : can be used to force the drive to never negotiate a faster data rate than : UDMA33 (or whatever the cable you are using is capable of). I'm thinking : of Samsung in particular here. : : However, I agree, this is *annoying*; I don't know of 80 + 4 conductor cables : for 2.5" ATA drives. If anyone knows of such things then please do let me : know, as I've had significant problems with a development system at work which : is Mini-ITX form factor based with a 2.5" drive. FWIW, my laptop successfully copes: ad0: 57231MB at ata0-master UDMA100 that's a 2.5" drive. I believe that a standard 40 -> 44 connector connected on an 80 pin cable would do the trick. I know I've had some success with that here at work. Warner