From owner-freebsd-performance@FreeBSD.ORG Wed Sep 3 09:19:13 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 C2D2316A4BF for ; Wed, 3 Sep 2003 09:19:13 -0700 (PDT) Received: from silver.he.iki.fi (helenius.fi [193.64.42.241]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4CCEF43FDF for ; Wed, 3 Sep 2003 09:19:12 -0700 (PDT) (envelope-from pete@he.iki.fi) Received: from he.iki.fi (h81.vuokselantie10.fi [193.64.42.129]) by silver.he.iki.fi (8.12.9/8.11.4) with ESMTP id h83GJ62k012517; Wed, 3 Sep 2003 19:19:06 +0300 (EEST) (envelope-from pete@he.iki.fi) Message-ID: <3F561479.2040305@he.iki.fi> Date: Wed, 03 Sep 2003 19:19:05 +0300 From: Petri Helenius User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4) Gecko/20030624 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Max Clark References: In-Reply-To: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit cc: freebsd-performance@freebsd.org cc: Dan Nelson 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 16:19:13 -0000 Max Clark wrote: > >- 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? > > > The only ways to make sure are; 1) go through the source and look for places where block numbers are carried in 32 bit variables 2) test it filling the system with more than one 1TB used on each subdisk (>3TB in your case) I think there would be quite a few people appreciating the results. However, the fsck problem will persist for filesystems larger than 3TB. Pete