From owner-freebsd-questions@FreeBSD.ORG Thu Jan 25 22:22:55 2007 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 106D616A400 for ; Thu, 25 Jan 2007 22:22:55 +0000 (UTC) (envelope-from milo@cyberlifelabs.com) Received: from smtp.cyberlifelabs.com (197-39.84.64.master-link.com [64.84.39.197]) by mx1.freebsd.org (Postfix) with ESMTP id D60DC13C43E for ; Thu, 25 Jan 2007 22:22:54 +0000 (UTC) (envelope-from milo@cyberlifelabs.com) Received: from [192.168.1.101] ([71.146.45.11]) (AUTH: LOGIN milo@cyberlifelabs.com) by mail.geo.cyberlifelabs.com with esmtp; Thu, 25 Jan 2007 14:22:54 -0800 Mime-Version: 1.0 (Apple Message framework v752.2) In-Reply-To: References: <25E0702D-C3A3-4B6B-BC56-D1BC5C1347F5@cyberlifelabs.com> <0C1E63BE-0E2B-4ABC-952C-3EDC95CF8D8A@mac.com> <8A3D6CC2-5BB8-4A3F-9D72-C37383186C34@cyberlifelabs.com> Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Message-Id: Content-Transfer-Encoding: 7bit From: Milo Hyson Date: Thu, 25 Jan 2007 14:22:53 -0800 To: freebsd-questions@freebsd.org X-Mailer: Apple Mail (2.752.2) Subject: Re: RAID Performance Questions 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: Thu, 25 Jan 2007 22:22:55 -0000 On Jan 25, 2007, at 13:50, Jeff Mohler wrote: > How about one large raid, and two partitions to serve each purpose? > > Being so limited in HW, youre either going to take a _huuuuuge_ > performance hit with only 2 disks per raid (unless Raid0), or an > availability hit with everything on one RAID set. I suppose availability is more important than performance. However reliability is even more important. My big concern with a single, large array is that should the array become corrupted for any reason, I'll lose both the live and the backup. Also, in that configuration, the backup becomes little more than transparent revision control. Another factor to consider (which I should have mentioned earlier) is that with the exception of any locally hosted databases, this is a NAS box. All data access will be via FastEthernet, and that's more of a bottleneck than any disks I have. -- Milo Hyson CyberLife Labs