From owner-freebsd-usb@FreeBSD.ORG Sun Dec 26 13:17:15 2004 Return-Path: Delivered-To: freebsd-usb@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id E484C16A4CE for ; Sun, 26 Dec 2004 13:17:15 +0000 (GMT) Received: from srv1.cosmo-project.de (srv1.cosmo-project.de [213.83.6.106]) by mx1.FreeBSD.org (Postfix) with ESMTP id 3002343D1D for ; Sun, 26 Dec 2004 13:17:15 +0000 (GMT) (envelope-from ticso@cicely12.cicely.de) Received: from cicely5.cicely.de (cicely5.cicely.de [IPv6:3ffe:400:8d0:301:200:92ff:fe9b:20e7]) (authenticated bits=0) iBQDH2P8050996 (version=TLSv1/SSLv3 cipher=EDH-RSA-DES-CBC3-SHA bits=168 verify=OK); Sun, 26 Dec 2004 14:17:04 +0100 (CET) (envelope-from ticso@cicely12.cicely.de) Received: from cicely12.cicely.de (cicely12.cicely.de [IPv6:3ffe:400:8d0:301::12]) by cicely5.cicely.de (8.12.10/8.12.10) with ESMTP id iBQDGCrU096284 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Sun, 26 Dec 2004 14:16:13 +0100 (CET) (envelope-from ticso@cicely12.cicely.de) Received: from cicely12.cicely.de (localhost [127.0.0.1]) by cicely12.cicely.de (8.12.11/8.12.11) with ESMTP id iBQDGCDX074089; Sun, 26 Dec 2004 14:16:12 +0100 (CET) (envelope-from ticso@cicely12.cicely.de) Received: (from ticso@localhost) by cicely12.cicely.de (8.12.11/8.12.11/Submit) id iBQDG8r9074088; Sun, 26 Dec 2004 14:16:08 +0100 (CET) (envelope-from ticso) Date: Sun, 26 Dec 2004 14:16:08 +0100 From: Bernd Walter To: Julian Elischer Message-ID: <20041226131607.GJ58581@cicely12.cicely.de> References: <41CD83E6.1010304@gmail.com> <20041225181725.GE58581@cicely12.cicely.de> <41CDEDE2.5030900@gmail.com> <20041226002721.GG58581@cicely12.cicely.de> <41CE5B7F.3090805@elischer.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <41CE5B7F.3090805@elischer.org> X-Operating-System: FreeBSD cicely12.cicely.de 5.2-CURRENT alpha User-Agent: Mutt/1.5.6i X-Spam-Status: No, hits=-4.9 required=3.0 tests=BAYES_00 autolearn=ham version=2.64 X-Spam-Report: * -4.9 BAYES_00 BODY: Bayesian spam probability is 0 to 1% * [score: 0.0000] X-Spam-Checker-Version: SpamAssassin 2.64 (2004-01-11) on cicely12.cicely.de cc: ticso@cicely.de cc: freebsd-usb@freebsd.org Subject: Re: How to mount usb2 devices X-BeenThere: freebsd-usb@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: ticso@cicely.de List-Id: FreeBSD support for USB List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 26 Dec 2004 13:17:16 -0000 On Sat, Dec 25, 2004 at 10:34:39PM -0800, Julian Elischer wrote: > Bernd Walter wrote: > >On Sat, Dec 25, 2004 at 11:46:58PM +0100, Darksidex wrote: > > > >>Bernd Walter wrote: > >> > >> > >>>It is running high speed, because it is attached to your ehci > >>>controller. > >>>Having high throughput is another story - msdosfs is not very efficient > >>>with some devices - you might want to check a dd with big block sizes > >>>to verify if higher speed can be reached. > >>> > >>> > >> > >>How can I do it? > > > > > >dd if=/dev/da-whatever-number-it-is of=/dev/null bs=64k > >You may want to test higher values for bs= too. > > I think that there is a lot of work that can be done to speed up > USB2 devices.. Likely - there is still a lot that can be done even for full speed devices. > for example Ugen devices can be sped up by an order of magnitude > with a simple set of changes. (that I will commit when I clean > them up) I have to guess that the Umass driver may have similar > performance problems. So you can speed up ugen devices - sounds interesting. What is the basic idea behind? -- B.Walter BWCT http://www.bwct.de bernd@bwct.de info@bwct.de