From owner-freebsd-stable Fri Jun 21 6:53:44 2002 Delivered-To: freebsd-stable@freebsd.org Received: from bran.mc.mpls.visi.com (bran.mc.mpls.visi.com [208.42.156.103]) by hub.freebsd.org (Postfix) with ESMTP id AEADC37B408 for ; Fri, 21 Jun 2002 06:53:39 -0700 (PDT) Received: from sheol.localdomain (hawkeyd-fw.dsl.visi.com [208.42.101.193]) by bran.mc.mpls.visi.com (Postfix) with ESMTP id 0266A4E05 for ; Fri, 21 Jun 2002 08:53:39 -0500 (CDT) Received: (from hawkeyd@localhost) by sheol.localdomain (8.11.6/8.11.6) id g5LDrYE01197 for freebsd-stable@freebsd.org; Fri, 21 Jun 2002 08:53:34 -0500 (CDT) (envelope-from hawkeyd) Date: Fri, 21 Jun 2002 08:53:34 -0500 From: D J Hawkey Jr To: stable at FreeBSD Subject: Another Q about hw.ata.atapi_dma Message-ID: <20020621085334.A1165@sheol.localdomain> Reply-To: hawkeyd@visi.com Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5.1i Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Hi. OK, so I boot, hit the spacebar, and enter 'set hw.ata.atapi_dma="1"', and 'boot'. The sysctl setting takes: [sheol] ~$ sysctl -a |grep dma hw.ata.ata_dma: 1 hw.ata.atapi_dma: 1 hw.atamodes: dma,---,pio,pio, And/but dmesg still shows (correspondingly): ... acd0: CD-RW at ata1-master using PIO3 acd1: CDROM at ata1-slave using PIO4 ... Does this mean the hardware doesn't support DMA, or am I looking at the wrong thing to see that it is using DMA? The drives do function. This is under FreeBSD 4.5-RELEASE-p4, BTW. I just want to see if I can extract a little more speed out of the drives, but I'm also trying to anticipate problems when I upgrade to FreeBSD 4.6. Thanks, Dave -- ______________________ ______________________ \__________________ \ D. J. HAWKEY JR. / __________________/ \________________/\ hawkeyd@visi.com /\________________/ http://www.visi.com/~hawkeyd/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message