From owner-freebsd-questions@FreeBSD.ORG Thu Dec 16 09:35:24 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 4B51C16A4CE for ; Thu, 16 Dec 2004 09:35:24 +0000 (GMT) Received: from mx1.mail.ru (mx1.mail.ru [194.67.23.121]) by mx1.FreeBSD.org (Postfix) with ESMTP id F17EF43D45 for ; Thu, 16 Dec 2004 09:35:23 +0000 (GMT) (envelope-from infofarmer@mail.ru) Received: from [83.237.13.66] (port=1958 helo=[172.17.0.69]) by mx1.mail.ru with esmtp id 1Ces2c-0009pi-00 for questions@freebsd.org; Thu, 16 Dec 2004 12:35:22 +0300 Message-ID: <41C156D8.1070209@mail.ru> Date: Thu, 16 Dec 2004 12:35:20 +0300 From: "Andrew P." User-Agent: Mozilla Thunderbird 1.0 (Windows/20041206) X-Accept-Language: en-us, en MIME-Version: 1.0 To: questions@freebsd.org Content-Type: text/plain; charset=windows-1251; format=flowed Content-Transfer-Encoding: 7bit X-Spam: Not detected Subject: FreeBSD, big hard drives and DMA X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: infofarmer@mail.ru List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 16 Dec 2004 09:35:24 -0000 Hello! I have a freebsd box with an (in)famous Abit BE6-II board. It has a built-in HPT controller in addition to a general one (440BX chipset). The HPT handles drives of any sizes, the general one handled anything up to around 120Gb. I was amazed when I tried to put a 200Gb drive on the common controller, set it to none in the BIOS and freebsd saw every single byte of it. Should I praise Soren (forgive me for my spelling) or anybody else :-)? Anyways, when I tried to copy files from another 200Gb drive which was on the HPT the speed was fairly high (15-17Mb), but kinda limited. I looked at the CPU load - and it was around 65%. I'm a freebsd novice - could somebody please tell me how to tune DMA parameters? Best wishes, Andrew P.