From owner-freebsd-current@FreeBSD.ORG Thu Jul 23 08:04:50 2009 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 71B00106566C for ; Thu, 23 Jul 2009 08:04:50 +0000 (UTC) (envelope-from hselasky@c2i.net) Received: from swip.net (mailfe11.swip.net [212.247.155.65]) by mx1.freebsd.org (Postfix) with ESMTP id 093748FC0C for ; Thu, 23 Jul 2009 08:04:49 +0000 (UTC) (envelope-from hselasky@c2i.net) X-Cloudmark-Score: 0.000000 [] X-Cloudmark-Analysis: v=1.0 c=1 a=UB_yN8qgYpcA:10 a=gg2W7PyvkLb8p4ie143lBA==:17 a=xXnuTjoHLCyQ-YV6x5kA:9 a=hAbdpAEGA_MrFVXn9w9PmRtqZsoA:4 Received: from [194.248.135.20] (account mc467741@c2i.net HELO laptop.adsl.tele2.no) by mailfe11.swip.net (CommuniGate Pro SMTP 5.2.13) with ESMTPA id 1112282405; Thu, 23 Jul 2009 10:04:48 +0200 From: Hans Petter Selasky To: freebsd-current@freebsd.org Date: Thu, 23 Jul 2009 10:04:36 +0200 User-Agent: KMail/1.11.4 (FreeBSD/8.0-BETA2; KDE/4.2.4; i386; ; ) References: <4A67CD2B.9040200@mykitchentable.net> In-Reply-To: <4A67CD2B.9040200@mykitchentable.net> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200907231004.37704.hselasky@c2i.net> Cc: Drew Tomlinson Subject: Re: USB 2.0 External Drive - What Is A Reasonable Transfer Rate? 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: Thu, 23 Jul 2009 08:04:50 -0000 On Thursday 23 July 2009 04:38:35 Drew Tomlinson wrote: > I have a USB 2.0 external drive that's formatted as NTFS under Windows > XP. I've plugged it into my 8.0 BETA2 install and am copying files to a > local raid1z zpool with one vdev consisting of 4 drives. I'm trying to > move about 100 GB of assorted files and have been at it all day. The > USB drive contains assorted files such as mp3, CD/DVD images, zip, > documents, etc. I'm guessing most files range between 1 - 4 MB with > some as large as 4 GB. > > Anyway, iostat shows the transfer rate at around 2 - 3 MB per second. > Is this all I should expect from a USB 2.0 drive? Is there anything I > can do to speed this up? Hi, Benchmark your device like this: dd if=/dev/daX of=/dev/null bs=65536 It will give you the correct transferrate number. Maybe there are some utilities in /usr/ports that can read NTFS faster than the kernel NTFS driver. --HPS