From owner-freebsd-current@FreeBSD.ORG Fri Apr 29 12:46:52 2005 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 1EDA316A4CE for ; Fri, 29 Apr 2005 12:46:52 +0000 (GMT) Received: from gwmail1.grupos.com.br (gwmail1.grupos.com.br [66.90.64.125]) by mx1.FreeBSD.org (Postfix) with ESMTP id D5B8543D1F for ; Fri, 29 Apr 2005 12:46:51 +0000 (GMT) (envelope-from marcus@corp.grupos.com.br) Received: from corp.grupos.com.br (unknown [150.162.166.55]) by gwmail1.grupos.com.br (Postfix) with ESMTP id EA3FD3D3CE for ; Fri, 29 Apr 2005 09:46:50 -0300 (BRT) Received: from [150.162.166.51] (unknown [150.162.166.51]) by corp.grupos.com.br (Postfix) with ESMTP id 283D8562D for ; Fri, 29 Apr 2005 09:46:50 -0300 (BRT) Message-ID: <42722CB9.7050702@corp.grupos.com.br> Date: Fri, 29 Apr 2005 09:46:49 -0300 From: Marcus Grando User-Agent: Mozilla Thunderbird 1.0.2 (X11/20050317) X-Accept-Language: en-us, en MIME-Version: 1.0 To: freebsd-current@freebsd.org References: <069901c54bfd$2967ba40$7f06000a@int.mediasurface.com> In-Reply-To: <069901c54bfd$2967ba40$7f06000a@int.mediasurface.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: Very low disk performance Highpoint 1820a X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 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: Fri, 29 Apr 2005 12:46:52 -0000 You try with iozone (benchmarks/iozone)? Regards Steven Hartland wrote: > I've just finished putting together a new server box spec: > Dual AMD 244, 2GB ram, 5 * Seagate SATA 400GB on a > Highpoint 1820a RAID 5 array. > The machine is currently running 5.4-STABLE ( from the > weekend ) After install I did some basic tests and the > disk is return very poor performance low in fact than a > single disk on a bog standard ATA 100 controller: > > 5.4-STABLE Highpoint 1820a RAID 5 ( 5 disk ) > dd if=/dev/da0 of=/dev/null bs=64k count=10000 > 10000+0 records in > 10000+0 records out > 655360000 bytes transferred in 13.348032 secs (49097875 bytes/sec) > > 5.3-RELEASE Highpoint 454 RAID 5 ( 4 disk ) > dd if=/dev/da0 of=/dev/null bs=64k count=10000 > 10000+0 records in > 10000+0 records out > 655360000 bytes transferred in 20.410034 secs (32109697 bytes/sec) > > 5.2.1-RELEASE Intel ICH3 UDMA100 ( 1 disk ) > dd if=/dev/ad0 of=/dev/null bs=64k count=10000 > 10000+0 records in > 10000+0 records out > 655360000 bytes transferred in 11.142405 secs (58816745 bytes/sec) > > Obviously something is seriously a miss here somewhere as > both the RAID 5 arrays a producing less throughput than > a single disk. > > Where do I start looking? > > Steve -- Marcus Grando Grupos Internet S/A marcus(at)corp.grupos.com.br