From owner-freebsd-performance@FreeBSD.ORG  Mon May  2 13:25:44 2005
Return-Path: <owner-freebsd-performance@FreeBSD.ORG>
Delivered-To: freebsd-performance@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id F11D716A4CE
	for <freebsd-performance@freebsd.org>;
	Mon,  2 May 2005 13:25:44 +0000 (GMT)
Received: from web41214.mail.yahoo.com (web41214.mail.yahoo.com
	[66.218.93.47])	by mx1.FreeBSD.org (Postfix) with SMTP id BD64D43D45
	for <freebsd-performance@freebsd.org>;
	Mon,  2 May 2005 13:25:44 +0000 (GMT)
	(envelope-from arne_woerner@yahoo.com)
Received: (qmail 73807 invoked by uid 60001); 2 May 2005 13:25:44 -0000
Comment: DomainKeys? See http://antispam.yahoo.com/domainkeys
DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws;
	s=s1024; d=yahoo.com;
	b=dLAUYbVn6cKuBRgQ0/0G4nfGd8qWARacZHkf54FUtff+KU4N7y0q2f+HJ10xoSoYjTQRWXMhEj1WiLdBYjLnAnWLyWJCf6LxS/luz1OfvjRvlgO3U8BCQzl9RM/jZ806Ue3Zqt8nmqIhAo1JJB6T97o4uI6KwqG85alCqLbbQSA=
	;
Message-ID: <20050502132544.73805.qmail@web41214.mail.yahoo.com>
Received: from [83.129.171.204] by web41214.mail.yahoo.com via HTTP;
	Mon, 02 May 2005 06:25:44 PDT
Date: Mon, 2 May 2005 06:25:44 -0700 (PDT)
From: Arne "Wörner" <arne_woerner@yahoo.com>
To: Poul-Henning Kamp <phk@phk.freebsd.dk>
In-Reply-To: 6667
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
cc: freebsd-performance@freebsd.org
Subject: Re: Very low disk performance on 5.x 
X-BeenThere: freebsd-performance@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Performance/tuning <freebsd-performance.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-performance>,
	<mailto:freebsd-performance-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-performance>
List-Post: <mailto:freebsd-performance@freebsd.org>
List-Help: <mailto:freebsd-performance-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-performance>,
	<mailto:freebsd-performance-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 02 May 2005 13:25:45 -0000

--- Poul-Henning Kamp <phk@phk.freebsd.dk> wrote:
> Uhm, if you are using RAID5 and your requests are not aligned
> and sized after the RAID5 you should *expect* read performance
> to be poor.
>
Wouldn't that affect both (read and write) in the same way?

> If the disk has bad sectors or other hardware issues, this is
> not an atypical result.
>
dito :-)

-Arne


__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com