From owner-freebsd-questions@FreeBSD.ORG  Sun Jul 22 21:56:57 2012
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
	by hub.freebsd.org (Postfix) with ESMTP id 17712106566B
	for <freebsd-questions@freebsd.org>;
	Sun, 22 Jul 2012 21:56:57 +0000 (UTC)
	(envelope-from jakub_lach@mailplus.pl)
Received: from sam.nabble.com (sam.nabble.com [216.139.236.26])
	by mx1.freebsd.org (Postfix) with ESMTP id E241B8FC08
	for <freebsd-questions@freebsd.org>;
	Sun, 22 Jul 2012 21:56:56 +0000 (UTC)
Received: from [192.168.236.26] (helo=sam.nabble.com)
	by sam.nabble.com with esmtp (Exim 4.72)
	(envelope-from <jakub_lach@mailplus.pl>) id 1St492-0004Dg-Hx
	for freebsd-questions@freebsd.org; Sun, 22 Jul 2012 14:56:56 -0700
Date: Sun, 22 Jul 2012 14:56:56 -0700 (PDT)
From: Jakub Lach <jakub_lach@mailplus.pl>
To: freebsd-questions@freebsd.org
Message-ID: <1342994216549-5729035.post@n5.nabble.com>
In-Reply-To: <alpine.BSF.2.00.1207222331130.4614@wojtek.tensor.gdynia.pl>
References: <1342992043358-5729028.post@n5.nabble.com>
	<alpine.BSF.2.00.1207222331130.4614@wojtek.tensor.gdynia.pl>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Subject: Re: "da0: 40.000MB/s transfers" What was rationale behind pegging
 USB 2.0 at 40MB/s?
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 22 Jul 2012 21:56:57 -0000

18MB/s write is figure from few

dd if=/dev/zero of=/dev/da0 bs=1 to 15M

runs, 13-14MB/s from actual files copied
in mc to flash and 36-39MB/s file copied 
from flash to hdd in mc. 

dd if=/dev/da0 of=/dev/zero bs=15m

gives 33MB/s read.

Speaking of advertisements, yes I know
but USB 3.0 drives with nice flashes are
capable of speeds well above 2.0 limits, 
and that's the point anyway.

Speaking of formatting, I can't agree, as 
I bought such awfully formatted drive, that it
had to be FAT formatted in Windows  to be 
even recognized in FreeBSD as device. 

And I don't usually have Windows around.



--
View this message in context: http://freebsd.1045724.n5.nabble.com/da0-40-000MB-s-transfers-What-was-rationale-behind-pegging-USB-2-0-at-40MB-s-tp5729028p5729035.html
Sent from the freebsd-questions mailing list archive at Nabble.com.