From owner-freebsd-performance@FreeBSD.ORG  Thu Apr 28 16:22:02 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 1B53116A4CE
	for <freebsd-performance@freebsd.org>;
	Thu, 28 Apr 2005 16:22:02 +0000 (GMT)
Received: from web41214.mail.yahoo.com (web41214.mail.yahoo.com
	[66.218.93.47])	by mx1.FreeBSD.org (Postfix) with SMTP id B254943D31
	for <freebsd-performance@freebsd.org>;
	Thu, 28 Apr 2005 16:22:01 +0000 (GMT)
	(envelope-from arne_woerner@yahoo.com)
Received: (qmail 39271 invoked by uid 60001); 28 Apr 2005 16:22:01 -0000
Comment: DomainKeys? See http://antispam.yahoo.com/domainkeys
DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws;
	s=s1024; d=yahoo.com;
	b=ZhUzdL30egARs8w37gecUOqxqRO8GbEYNnaH0h8iESbUIlKMAL3Uoc2LpDqNRQ5EPFw2VpJqJPz2/xtLu501DIwQSgvxmqwtUSW+ayW99S1EFkgkJpcYTKZywKY+vr/Kjtdasx74MRQhK7yz4x7wos8lGozccoZgJ1IAFPtHztI=
	;
Message-ID: <20050428162201.39269.qmail@web41214.mail.yahoo.com>
Received: from [83.129.189.236] by web41214.mail.yahoo.com via HTTP;
	Thu, 28 Apr 2005 09:22:01 PDT
Date: Thu, 28 Apr 2005 09:22:01 -0700 (PDT)
From: Arne "Wörner" <arne_woerner@yahoo.com>
To: Steven Hartland <killing@multiplay.co.uk>,
	Eric Anderson <anderson@centtech.com>
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 Highpoint 1820a
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: Thu, 28 Apr 2005 16:22:02 -0000

--- Steven Hartland <killing@multiplay.co.uk> wrote:
> Only on write this is a read test.
>
Oh. Ok! :-)

But there is a striping-like effect (especially when u use n=8
discs in one RAID-5 and when u do sequential read), so that the
performance could be easily (n-1)*40MB/sec (which would be in your
case 350MB/sec; my single ATA disc reads 40 or about 40 MB/sec).

So I would say, that something in the ATA driver is sub-optimal
and worse than before. But I do not know what... There are so many
lines...

-Arne


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