From owner-freebsd-current@FreeBSD.ORG Wed May 31 15:14:53 2006 Return-Path: X-Original-To: freebsd-current@freebsd.org Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5681416B4D3 for ; Wed, 31 May 2006 15:14:53 +0000 (UTC) (envelope-from scottl@samsco.org) Received: from pooker.samsco.org (pooker.samsco.org [168.103.85.57]) by mx1.FreeBSD.org (Postfix) with ESMTP id 5897843D5D for ; Wed, 31 May 2006 15:14:35 +0000 (GMT) (envelope-from scottl@samsco.org) Received: from [10.10.3.185] ([69.15.205.254]) (authenticated bits=0) by pooker.samsco.org (8.13.4/8.13.4) with ESMTP id k4VFEHAb098897; Wed, 31 May 2006 09:14:23 -0600 (MDT) (envelope-from scottl@samsco.org) Message-ID: <447DB2BF.5010609@samsco.org> Date: Wed, 31 May 2006 09:14:07 -0600 From: Scott Long User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.7.12) Gecko/20060206 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Dan Nelson References: <200605301914.41981.rodperson@adelphia.net> <20060531150634.GD6982@dan.emsphone.com> In-Reply-To: <20060531150634.GD6982@dan.emsphone.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=0.0 required=3.8 tests=none autolearn=failed version=3.1.1 X-Spam-Checker-Version: SpamAssassin 3.1.1 (2006-03-10) on pooker.samsco.org Cc: Rod Person , freebsd-current@freebsd.org Subject: Re: Current 7 U320 transfer rate only 3.300 MB/s X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 31 May 2006 15:15:00 -0000 Dan Nelson wrote: > In the last episode (May 30), Rod Person said: > >>I have and LSI u320 SCSI controller on a TYAN Thunder K8WE board with >>and nvidia4 chipset. My boot message displays the following >> >>da0 at mpt0 bus 0 target 0 lun 0 >>da0 FIXED Direct Access SCSI-3 device >>da0 3.300MB/s tranfers, Tagged Queueing Enabled >> >>Why is my transfer rate so low? Anyone have an idea how I can correct >>this? > > > That may just be a display bug. Does "diskinfo -t da0" report > reasonable speeds? If not, check your bios to see if you are forcing a > slow speed, or try running "camcontrol negotiate da0 -R 160" to force > 320MB speeds (160 Mhz * 16 bit bus = 320MB). > It's a bug in the MPT driver, though it usually only manifests itself with 4 or more drives. Scott