From owner-freebsd-questions@FreeBSD.ORG Wed Mar 24 08:35:12 2004 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 1F7D416A4CE for ; Wed, 24 Mar 2004 08:35:12 -0800 (PST) Received: from dan.emsphone.com (dan.emsphone.com [199.67.51.101]) by mx1.FreeBSD.org (Postfix) with ESMTP id B593D43D2D for ; Wed, 24 Mar 2004 08:35:11 -0800 (PST) (envelope-from dan@dan.emsphone.com) Received: (from dan@localhost) by dan.emsphone.com (8.12.10/8.12.10) id i2OGZAYS053691; Wed, 24 Mar 2004 10:35:10 -0600 (CST) (envelope-from dan) Date: Wed, 24 Mar 2004 10:35:10 -0600 From: Dan Nelson To: adp Message-ID: <20040324163510.GA3446@dan.emsphone.com> References: <013a01c411b6$68742a20$4b0a000a@yourqqh4336axf> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <013a01c411b6$68742a20$4b0a000a@yourqqh4336axf> X-OS: FreeBSD 5.2-CURRENT X-message-flag: Outlook Error User-Agent: Mutt/1.5.6i cc: questions@freebsd.org Subject: Re: FreeBSD hdparm? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Mar 2004 16:35:12 -0000 In the last episode (Mar 24), adp said: > I know that under Linux I can modify how the OS uses IDE drives using > hdparm. Is there an equivilent for FreeBSD? 'man tuning' seems to > indicate that there isn't anything and that I only need to worry > about whether I need to use softupdates. (It also mentions sysctl > values such as vfs.vmiodirenable, which seems enabled in 4.9 by > default.) I can see a need to tweak the parameters of how FreeBSD > uses my disks unless it already knows when to enable certain > features, for example 32-bit IO. The old wd disk driver used to have a flag to enable 32-bit transfers, but the ATA driver doesn't. I assume it always uses 32-bit. You can set the transfer speed with the "atacontrol" command if the driver didn't detect the right speed. -- Dan Nelson dnelson@allantgroup.com