From owner-freebsd-hardware@FreeBSD.ORG Wed Mar 4 22:52:45 2009 Return-Path: Delivered-To: freebsd-hardware@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 32926106564A for ; Wed, 4 Mar 2009 22:52:45 +0000 (UTC) (envelope-from ken@nargothrond.kdm.org) Received: from nargothrond.kdm.org (nargothrond.kdm.org [70.56.43.81]) by mx1.freebsd.org (Postfix) with ESMTP id B2FF48FC08 for ; Wed, 4 Mar 2009 22:52:44 +0000 (UTC) (envelope-from ken@nargothrond.kdm.org) Received: from nargothrond.kdm.org (localhost [127.0.0.1]) by nargothrond.kdm.org (8.14.2/8.13.6) with ESMTP id n24MXBth035779; Wed, 4 Mar 2009 15:33:11 -0700 (MST) (envelope-from ken@nargothrond.kdm.org) Received: (from ken@localhost) by nargothrond.kdm.org (8.14.2/8.14.2/Submit) id n24MXB9E035778; Wed, 4 Mar 2009 15:33:11 -0700 (MST) (envelope-from ken) Date: Wed, 4 Mar 2009 15:33:11 -0700 From: "Kenneth D. Merry" To: Rusu Silviu Message-ID: <20090304223310.GA35737@nargothrond.kdm.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2i X-Virus-Scanned: ClamAV 0.92.1/9067/Wed Mar 4 03:06:09 2009 on nargothrond.kdm.org X-Virus-Status: Clean Cc: freebsd-hardware@freebsd.org Subject: Re: Extremely slow read/write speed, 7.1 Release on Intel ICH9 SATA X-BeenThere: freebsd-hardware@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: General discussion of FreeBSD hardware List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Mar 2009 22:52:45 -0000 On Thu, Feb 26, 2009 at 18:57:48 +0200, Rusu Silviu wrote: > Extremely slow read/write speed, 7.1 Release on Intel ICH9 SATA > > Should i send this to freebsd-fs list? > > Have 3 HDDs > - 160G Seagate Serial ATA v1.0, 3 partitions: 1 - system, 2 - data, 3 - > storage, soft updates on for all partitions > - 750G Samsung Serial ATA II, 1 partition, soft updates on > - 1000G Samsung Serial ATA II, 1 partition, soft updates on > > hw.ata.wc=1 > > Mobo is an ASUS P5KR, P35/ICH9 > Buyed it cause `man ata' says ICH9 is supported > There are also Jmicron eSATA/PATA controller, that i actually disabled > No overclocking > > dd if=/dev/ad4 of=/dev/null > iostat -w1 ad4 > tty ad4 cpu > tin tout KB/t tps MB/s us ni sy in id > 47 48 1.65 252 0.40 6 0 1 1 92 > 1 251 0.50 12650 6.18 2 0 15 14 69 > 0 88 0.50 12583 6.15 3 0 18 12 67 > 0 87 0.50 12641 6.17 3 0 18 12 68 [ ... ] You should specify a blocksize with dd. By default, it uses 512 byte blocks, which will result in very slow transfer speeds. Try this instead: dd if=/dev/ad4 of=/dev/null bs=1m Ken -- Kenneth Merry ken@kdm.org