From owner-freebsd-performance@FreeBSD.ORG Wed Sep 3 08:43:36 2003 Return-Path: Delivered-To: freebsd-performance@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 7A31616A4C0 for ; Wed, 3 Sep 2003 08:43:36 -0700 (PDT) Received: from Chow.corp.media.net (rottie.media.net [66.113.65.4]) by mx1.FreeBSD.org (Postfix) with ESMTP id 64E5F43F85 for ; Wed, 3 Sep 2003 08:43:35 -0700 (PDT) (envelope-from max.clark@media.net) Received: from MCLARK (76.0.6.10.IN-ADDR.ARPA [10.6.0.76]) by Chow.corp.media.net (Netscape Messaging Server 4.15) with SMTP id HKNA4Q00.040; Wed, 3 Sep 2003 08:38:50 -0700 From: "Max Clark" To: "Dan Nelson" Date: Wed, 3 Sep 2003 08:49:20 -0700 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0) Importance: Normal In-Reply-To: <20030903020648.GC98381@dan.emsphone.com> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 cc: freebsd-performance@freebsd.org Subject: RE: 20TB Storage System X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 03 Sep 2003 15:43:36 -0000 -----Original Message----- From: Dan Nelson [mailto:dnelson@allantgroup.com] Sent: Tuesday, September 02, 2003 7:07 PM To: Max Clark Subject: Re: 20TB Storage System > Would I be better off using ccd or vinum for a raid 1 stripe here? Over hardware raid? Never; hardware raid is always better than software raid (but is always more expensive too). If you're asking which of ccd and vinum is faster, I don't know. Try both and tell us :) - You misunderstood. I am planning to do a Hardware Raid 5 with each shelf giving 3.5TB of disk. Then I need to put a Raid 0 stripe across the 3 shelves with software to give me the ~10TB filesystem. For this which would be better... ccd or vimum? -Max