From owner-freebsd-questions@FreeBSD.ORG Wed May 31 02:37:32 2006 Return-Path: X-Original-To: questions@freebsd.org 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 2B0B116A8B5 for ; Wed, 31 May 2006 02:37:32 +0000 (UTC) (envelope-from cperciva@freebsd.org) Received: from pd3mo2so.prod.shaw.ca (shawidc-mo1.cg.shawcable.net [24.71.223.10]) by mx1.FreeBSD.org (Postfix) with ESMTP id BD64243D4C for ; Wed, 31 May 2006 02:37:31 +0000 (GMT) (envelope-from cperciva@freebsd.org) Received: from pd4mr2so.prod.shaw.ca (pd4mr2so-qfe3.prod.shaw.ca [10.0.141.213]) by l-daemon (Sun ONE Messaging Server 6.0 HotFix 1.01 (built Mar 15 2004)) with ESMTP id <0J0300B2PZAJAC70@l-daemon> for questions@freebsd.org; Tue, 30 May 2006 20:37:31 -0600 (MDT) Received: from pn2ml9so.prod.shaw.ca ([10.0.121.7]) by pd4mr2so.prod.shaw.ca (Sun ONE Messaging Server 6.0 HotFix 1.01 (built Mar 15 2004)) with ESMTP id <0J0300E9BZAJL860@pd4mr2so.prod.shaw.ca> for questions@freebsd.org; Tue, 30 May 2006 20:37:31 -0600 (MDT) Received: from hexahedron.daemonology.net ([24.82.18.31]) by l-daemon (Sun ONE Messaging Server 6.0 HotFix 1.01 (built Mar 15 2004)) with SMTP id <0J0300A6LZAIUIT0@l-daemon> for questions@freebsd.org; Tue, 30 May 2006 20:37:31 -0600 (MDT) Received: (qmail 1102 invoked from network); Wed, 31 May 2006 02:37:30 +0000 Received: from unknown (HELO ?127.0.0.1?) (127.0.0.1) by localhost with SMTP; Wed, 31 May 2006 02:37:30 +0000 Date: Tue, 30 May 2006 19:37:29 -0700 From: Colin Percival In-reply-to: To: Jon Falconer Message-id: <447D0169.4050301@freebsd.org> MIME-version: 1.0 Content-type: text/plain; charset=ISO-8859-1 Content-transfer-encoding: 7bit X-Enigmail-Version: 0.94.0.0 References: User-Agent: Thunderbird 1.5 (X11/20060416) Cc: questions@freebsd.org Subject: Re: transfer speed of USB on a Dell PE2650 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 31 May 2006 02:37:32 -0000 Jon Falconer wrote: > I thought that an external USB hard drive would make a good backup device. > So I did some trial file copies. Even though the servers USB ports are > USB2.0 and the hard drive enclosure is USB2.0 I was getting a little less > than 1MByte per second of throughput. I do have the ehci device as well as > uhci and ohci configured into the kernel. But looking at the boot messages > I do not see that it finds an ehci device, only an ohci. > > Has anyone gotten a full USB2.0 throughput on Dell PowerEdge server > hardware? I haven't used Dell servers, but I've gotten 25MB/s to a USB-attached hard drive on a Dell laptop, so at least some Dell hardware works. :-) Colin Percival