From owner-freebsd-hardware@FreeBSD.ORG Tue Apr 26 07:23:37 2011 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 93AA2106564A for ; Tue, 26 Apr 2011 07:23:37 +0000 (UTC) (envelope-from fmaggi@elet.polimi.it) Received: from smtp1.elet.polimi.it (smtp1.elet.polimi.it [131.175.186.3]) by mx1.freebsd.org (Postfix) with ESMTP id 263708FC15 for ; Tue, 26 Apr 2011 07:23:36 +0000 (UTC) Received: from localhost (localhost.localdomain [127.0.0.1]) by smtp1.elet.polimi.it (Postfix) with ESMTP id EF5ED2409A4 for ; Tue, 26 Apr 2011 08:53:07 +0200 (CEST) X-Virus-Scanned: amavisd-new at elet.polimi.it Received: from smtp1.elet.polimi.it ([127.0.0.1]) by localhost (smtp1.elet.polimi.it [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id gFod0nuqR+GX for ; Tue, 26 Apr 2011 08:53:07 +0200 (CEST) Received: from mail-qy0-f175.google.com (mail-qy0-f175.google.com [209.85.216.175]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority" (verified OK)) by smtp1.elet.polimi.it (Postfix) with ESMTP id 95D5F2409A3 for ; Tue, 26 Apr 2011 08:53:07 +0200 (CEST) Received: by qyk35 with SMTP id 35so1163252qyk.13 for ; Mon, 25 Apr 2011 23:53:06 -0700 (PDT) MIME-Version: 1.0 Received: by 10.229.127.81 with SMTP id f17mr289170qcs.138.1303800786506; Mon, 25 Apr 2011 23:53:06 -0700 (PDT) Received: by 10.229.81.131 with HTTP; Mon, 25 Apr 2011 23:53:06 -0700 (PDT) In-Reply-To: <4D8F2C76.3010205@fuckner.net> References: <4D8F2C76.3010205@fuckner.net> Date: Tue, 26 Apr 2011 08:53:06 +0200 Message-ID: From: Federico Maggi To: "Freebsd-hardware@freebsd.org" Content-Type: text/plain; charset=ISO-8859-1 Cc: Subject: Re: Known issues with ZFS on ICH10R (Intel G45)? 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: Tue, 26 Apr 2011 07:23:37 -0000 Hi All, On Sunday, March 27, 2011, Michael Fuckner wrote: > On 03/27/11 11:35, Maggi Federico wrote: >> My only concern is the ICH10R SATA RAID controller. I've read that >> ZFS likes full access to the disks, and that built-in RAID systems >> (even if disabled) may lead to poor performances or, worst, errors. > Hi, > > it can be configured in Bios either es plain AHCI or Raid (which is a firmware/driver raid, not something you expect when hearing the word "RAID"). Pick AHCI and everything is fine. I've tested this machine on FreeBSD 8.2 (FreeNAS 0.8 RC5) and assigned vm.kmem_size/vm.kmem_size_max=512M, plus other options as suggested by the FreeBSD ZFS Tuning Guide. I put 4G of RAM and currently installed a 32bit Celeron, while waiting for a 64bit to be shipped. I've been running some preliminary tests that turn out extremely unsatisfactory. For example: $ dd if=/dev/zero of=/mnt/data/test bs=2M was able to reach 150MB/s (on RAIDZ, four 300MB/s-SATA HDs). Is there something wrong on my testing or it's the SATA chipset driver support? Also, the network transfer rate on a gigabit LAN are very poor as well. For example, I've tried to scopy a 5GB-file and it didn't go beyond 10MB/s in both directions. Any suggestion is greatly appreciated. Thanks! -F