From owner-freebsd-questions Sat Jul 21 9:23:52 2001 Delivered-To: freebsd-questions@freebsd.org Received: from mail.urx.com (mail.urx.com [63.170.19.36]) by hub.freebsd.org (Postfix) with ESMTP id 0C79637B406 for ; Sat, 21 Jul 2001 09:23:49 -0700 (PDT) (envelope-from kstewart@urx.com) Received: from urx.com [206.159.132.160] by mail.urx.com with ESMTP (SMTPD32-6.06) id AC93A32F03A2; Sat, 21 Jul 2001 09:23:47 -0700 Message-ID: <3B59AC93.759B233C@urx.com> Date: Sat, 21 Jul 2001 09:23:47 -0700 From: Kent Stewart Reply-To: kstewart@urx.com Organization: Dynacom X-Mailer: Mozilla 4.77 [en] (Windows NT 5.0; U) X-Accept-Language: en MIME-Version: 1.0 To: User & Ian Patrick Thomas Cc: Bill Moran , freebsd-questions@freebsd.org Subject: Re: How to change UDMA mode on ata drives References: <3B5987B1.C5310BB0@iowna.com> <20010721114445.C5115@localhost> <3B59A707.F4D60AD0@iowna.com> <20010721121247.E5115@localhost> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG User & Ian Patrick Thomas wrote: > > As it was put forth by Bill Moran on Sat, Jul 21, 2001 at 12:00:07PM -0400... > > User & Ian Patrick Thomas wrote: > > > > > > As it was put forth by Bill Moran on Sat, Jul 21, 2001 at 09:46:25AM -0400... > > > > I've got an ata100 drive that's buggy under ata100. I want to throttle it > > > > back to ata66 mode to see if the problem still exists. How is this done? > > > > > > > > -Bill > > > > > > > > > > Try this > > > > > > sysctl -a | grep "hw.ata.*" > > > > > > and check out man sysctl. > > > > > > Ian > > > > Thanks for the reply. > > > > The only options I have through sysctl are hw.atamodes, and hw.ata.ata_dma > > both of which only allow turning DMA on and off. I would like to leave it > > on, but force the controller to use UDMA4 (ata66) instead of UDMA5 (ata100) > > > > Is there a method for this, or is it an on/off proposition? > > I havn't found one that allows you to specify 66 instead of 100. If > you wanted to throttle down to 33 then you could use the 40 cable, but both > 66 and 100 use the 80 cable, correct? The driver uses the maximum > achievable speed. Could it be that the source to the driver needs to be > tweaked? Maxtor and Western Digital both have programs that will set the mode of the HD. Kent > > Ian > > > > > -Bill > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > with "unsubscribe freebsd-questions" in the body of the message > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message -- Kent Stewart Richland, WA mailto:kbstew99@hotmail.com http://kstewart.urx.com/kstewart/index.html FreeBSD News http://daily.daemonnews.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message