From owner-freebsd-questions@FreeBSD.ORG Tue Sep 30 21:50:31 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 91370106568A for ; Tue, 30 Sep 2008 21:50:31 +0000 (UTC) (envelope-from ai_quoc@hotmail.com) Received: from bay0-omc3-s35.bay0.hotmail.com (bay0-omc3-s35.bay0.hotmail.com [65.54.246.235]) by mx1.freebsd.org (Postfix) with ESMTP id 729188FC12 for ; Tue, 30 Sep 2008 21:50:31 +0000 (UTC) (envelope-from ai_quoc@hotmail.com) Received: from hotmail.com ([64.4.43.11]) by bay0-omc3-s35.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.3959); Tue, 30 Sep 2008 14:50:31 -0700 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Tue, 30 Sep 2008 14:50:30 -0700 Message-ID: Received: from 222.253.99.18 by BAY139-DAV1.phx.gbl with DAV; Tue, 30 Sep 2008 21:50:28 +0000 X-Originating-IP: [222.253.99.18] X-Originating-Email: [ai_quoc@hotmail.com] X-Sender: ai_quoc@hotmail.com From: "Danny Do" To: "'Wojciech Puchar'" References: <1222681181.48e0a25d094c3@www.inbox.lv> <48E21C66.8080407@FreeBSD.org> <20080930161407.E16761@wojtek.tensor.gdynia.pl> <20080930205435.B20033@wojtek.tensor.gdynia.pl> In-Reply-To: <20080930205435.B20033@wojtek.tensor.gdynia.pl> Date: Wed, 1 Oct 2008 04:49:27 +0700 Message-ID: <00ee01c92346$69508fa0$3bf1aee0$@com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: AckjLihlUAcmpUnBRSWHWk7aq/iMKAAFpr/A Content-Language: en-au X-OriginalArrivalTime: 30 Sep 2008 21:50:30.0982 (UTC) FILETIME=[8EF42E60:01C92346] Cc: freebsd-questions@freebsd.org Subject: RE: Optimal File System config for 2.5TB RAID5 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: Tue, 30 Sep 2008 21:50:31 -0000 Hi Wojciech Puchar, I got Perc 4E-DI Embedded Raid Adapter (256MB) from DELL for my current SCSI system. They said it's the enterprise class. I don't know much about the performance between software RAID and hardware RAID. Could you please tell me if this type of hardware RAID controller could match the software RAID you were talking about? I don't want to pay for it if I don't really need it. Thanks, Danny -----Original Message----- From: Wojciech Puchar [mailto:wojtek@wojtek.tensor.gdynia.pl] Sent: Wednesday, 1 October 2008 1:56 AM To: Danny Do Cc: freebsd-questions@freebsd.org Subject: RE: Optimal File System config for 2.5TB RAID5 > > The reason I want to use hardware RAID is because I got so much problem with > software RAID5 4 years ago on FreeBSD 5.4. I still remember those > nightmares. Furthermore, hardware RAID5 doesn't require much knowledge and > management. > > But you could be right, the CPU speed is triple now, software RAID gets > smarter and more stable, it could perform better than hardware RAID because > it's more flexible. But again, I still prefer hardware because it's easy to it's someone more than that, still - you don't read my mails carefully. you will get better performance with my patch, but still it will be crappy with your "hardware" RAIDs compared to what it should be