From owner-freebsd-questions@FreeBSD.ORG Sun Jun 4 16:16:17 2006 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 62C0316A5AE for ; Sun, 4 Jun 2006 16:16:17 +0000 (UTC) (envelope-from freebsd-questions@m.gmane.org) Received: from ciao.gmane.org (main.gmane.org [80.91.229.2]) by mx1.FreeBSD.org (Postfix) with ESMTP id E404E43D48 for ; Sun, 4 Jun 2006 16:16:16 +0000 (GMT) (envelope-from freebsd-questions@m.gmane.org) Received: from list by ciao.gmane.org with local (Exim 4.43) id 1FmvGj-00086J-8P for freebsd-questions@freebsd.org; Sun, 04 Jun 2006 18:16:01 +0200 Received: from r5bp69.chello.upc.cz ([86.49.75.69]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 04 Jun 2006 18:16:01 +0200 Received: from element by r5bp69.chello.upc.cz with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 04 Jun 2006 18:16:01 +0200 X-Injected-Via-Gmane: http://gmane.org/ To: freebsd-questions@freebsd.org From: Pavel Duda Date: Sun, 04 Jun 2006 18:15:35 +0200 Lines: 34 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Complaints-To: usenet@sea.gmane.org X-Gmane-NNTP-Posting-Host: r5bp69.chello.upc.cz User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.5) Gecko/20041103 Thunderbird/0.9 Mnenhy/0.6.0.104 X-Accept-Language: en-us, en Sender: news Subject: FreeBSD and newer HDD problems ? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 04 Jun 2006 16:16:25 -0000 Hello, I've recently bought new big HDD (WDC RE, 320GB) and it looks like FreeBSD has some troubles with it when trying to transfer files over network. If I try to perform some "synthetic" test like 'dd if=/dev/zero of=/wdc320/testfile' then I get some decent speeds about 40MB/s. When I try to copy some big files from my older disk (IBM 40GB) I still have write about 25-27MB/s. Problem comes when I try to copy something to disk over network (tried samba, ftp) disk write speed is very low - about 5-6MB/s at max. When testing this issue I've start 'systat -vmstat 1' and noticed that my new disk is very busy (60-100%) and speed (MB/s) jumps up and down. If I write files with 'dd' or transfer them from disk 2 disk then write speed and disk load is almost constant (about 60%). When transfering files over network to old HDD then disk load is low (40-50%) and speed is constant (8-9MB/s). To be sure that disk it is not some kind of disk problem I've installed Debian 3.1r2 with same version of samba and I get 9-11MB/s transfer speeds (in both directions) !! Also it doesn't matter if I use transfer data over gigabit card or 100mbit card. Results are similar. FreeBSD is in avarage very very slow (3MB) while Debian works fine (10MB). Because my server is primarily used for transfer files (Samba + PDC) it is crucial for me to have highest transfer speeds possible and I'd like to stick with FreeBSD :-/. Does someone has any idea what could be wrong or how could I determine what causes this problem ? Thanks for any advice. Pavel