From owner-freebsd-usb@FreeBSD.ORG  Thu Dec  8 09:13:14 2011
Return-Path: <owner-freebsd-usb@FreeBSD.ORG>
Delivered-To: freebsd-usb@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 6AF45106564A
	for <freebsd-usb@freebsd.org>; Thu,  8 Dec 2011 09:13:14 +0000 (UTC)
	(envelope-from hselasky@c2i.net)
Received: from swip.net (mailfe09.c2i.net [212.247.155.2])
	by mx1.freebsd.org (Postfix) with ESMTP id BF8608FC0C
	for <freebsd-usb@freebsd.org>; Thu,  8 Dec 2011 09:13:13 +0000 (UTC)
X-T2-Spam-Status: No, hits=-0.2 required=5.0 tests=ALL_TRUSTED,
	BAYES_50
Received: from [188.126.198.129] (account mc467741@c2i.net HELO
	laptop002.hselasky.homeunix.org)
	by mailfe09.swip.net (CommuniGate Pro SMTP 5.4.2)
	with ESMTPA id 39706571; Thu, 08 Dec 2011 10:13:10 +0100
From: Hans Petter Selasky <hselasky@c2i.net>
To: freebsd-usb@freebsd.org,
 Matthias Apitz <guru@unixarea.de>
Date: Thu, 8 Dec 2011 10:10:36 +0100
User-Agent: KMail/1.13.5 (FreeBSD/8.2-STABLE; KDE/4.4.5; amd64; ; )
References: <20111208063711.GA6482@tinyCurrent>
In-Reply-To: <20111208063711.GA6482@tinyCurrent>
X-Face: *nPdTl_}RuAI6^PVpA02T?$%Xa^>@hE0uyUIoiha$pC:9TVgl.Oq, NwSZ4V"|LR.+tj}g5
	%V,x^qOs~mnU3]Gn; cQLv&.N>TrxmSFf+p6(30a/{)KUU!s}w\IhQBj}[g}bj0I3^glmC(
	:AuzV9:.hESm-x4h240C`9=w
MIME-Version: 1.0
Content-Type: Text/Plain;
  charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Message-Id: <201112081010.36695.hselasky@c2i.net>
Cc: freebsd-questions@freebsd.org
Subject: Re: restore(8) to UFS on USB key: terrible slow
X-BeenThere: freebsd-usb@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: FreeBSD support for USB <freebsd-usb.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-usb>,
	<mailto:freebsd-usb-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-usb>
List-Post: <mailto:freebsd-usb@freebsd.org>
List-Help: <mailto:freebsd-usb-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-usb>,
	<mailto:freebsd-usb-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 08 Dec 2011 09:13:14 -0000

On Thursday 08 December 2011 07:37:12 Matthias Apitz wrote:
> Hello,
> 
> I encounter the following problem with UFS file systems on USB keys,
> i.e. the problem is not only with one key, but with all I have; the key
> in question here is:
> 
> Dec  7 22:17:47 tinyCurrent kernel: umass0: <Generic Mass Storage, class
> 0/0, rev 2.00/1.02, addr 3> on usbus4 Dec  7 22:17:47 tinyCurrent kernel:
> umass0:  SCSI over Bulk-Only; quirks = 0x4101 Dec  7 22:17:47 tinyCurrent
> root: Unknown USB device: vendor 0x058f product 0x6387 bus uhub4 Dec  7
> 22:17:48 tinyCurrent kernel: umass0:0:0:-1: Attached to scbus0 Dec  7
> 22:17:48 tinyCurrent kernel: da0 at umass-sim0 bus 0 scbus0 target 0 lun 0
> Dec  7 22:17:48 tinyCurrent kernel: da0: <Generic Flash Disk 8.07>
> Removable Direct Access SCSI-2 device Dec  7 22:17:48 tinyCurrent kernel:
> da0: 40.000MB/s transfers
> Dec  7 22:17:48 tinyCurrent kernel: da0: 7650MB (15667200 512 byte sectors:
> 255H 63S/T 975C)
> 
> and the system is:
> 
> $ uname -a
> FreeBSD tinyCurrent 9.0-CURRENT FreeBSD 9.0-CURRENT #1 r214444: Thu Oct 28
> 10:56:32 CEST 2010
> 
> The key was formatted the usual way for receiving a complete FreeBSD
> system for installation purpose:
> 
> # fdisk -I da0
> # fdisk -B da0
> # bsdlabel -w da0s1 auto
> # bsdlabel -B da0s1
> # bsdlabel -e da0s1
> # newfs /dev/da0s1a
> # mount /dev/da0s1a /mnt
> 
> When I now bulk write a big file to the file system, the write
> performance is reasonable fast, even with blocks of 512 bytes,
> it gives 2 MByte / sec:
> 
> # dd if=usb.dmp of=/mnt/byte
> 10926520+0 records in
> 10926520+0 records out
> 5594378240 bytes transferred in 2538.942585 secs (2203428 bytes/sec)
> 

Hello!

The default block size of dd is 512 bytes. Try setting bs=65536 :-)

--HPS