From owner-freebsd-stable@FreeBSD.ORG Wed Oct 27 14:57:06 2004 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 0BD9816A4CE for ; Wed, 27 Oct 2004 14:57:06 +0000 (GMT) Received: from mta9.adelphia.net (mta9.adelphia.net [68.168.78.199]) by mx1.FreeBSD.org (Postfix) with ESMTP id 9EB2843D2F for ; Wed, 27 Oct 2004 14:57:05 +0000 (GMT) (envelope-from security@jim-liesl.org) Received: from smtp.jim-liesl.org ([68.71.52.28]) by mta9.adelphia.net (InterMail vM.6.01.03.02 201-2131-111-104-20040324) with ESMTP id <20041027145704.CESX2497.mta9.adelphia.net@smtp.jim-liesl.org>; Wed, 27 Oct 2004 10:57:04 -0400 Received: from [127.0.0.1] (localhost.jim-liesl.org [127.0.0.1]) by smtp.jim-liesl.org (Postfix) with ESMTP id 36ACB152B2; Wed, 27 Oct 2004 08:57:03 -0600 (MDT) Message-ID: <417FB764.2040109@jim-liesl.org> Date: Wed, 27 Oct 2004 08:57:40 -0600 From: secmgr User-Agent: Mozilla Thunderbird 0.8 (Windows/20040913) X-Accept-Language: en-us, en MIME-Version: 1.0 References: <200410270027.47092.miha@ghuug.org> <1098855222.15580.81.camel@emperor> <200410271114.36794.miha@ghuug.org> <417F8EF6.9060304@mac.com> In-Reply-To: <417F8EF6.9060304@mac.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit cc: freebsd-stable@freebsd.org cc: miha@ghuug.org Subject: Re: question on vinum X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 27 Oct 2004 14:57:06 -0000 Chuck Swiger wrote: > No. All of the drives need to be the same size. With RAID-5, which > drive is used to hold parity data rotates on a stripe-by-stripe basis > to balance out the load. Just to clarify this point. All the subdisks in the plex need to be the same size. The physical drives and even the bsd partitions/vinum drives do not actually have to be the same. An example would be you have 2x 40gig partitions, and 2x 60 gig partitions. You could make a stripe set using 4 40gig (160gig) subdisks (or a 120gig raid 5 set). You just would't use the remaining 20 gig on the other two drives. You could use the space, just not for this plex. (you could create a 40gig (20+20) stripe or concat set or a mirrored 20gig area) Concat, on the other hand doesn't care and would happily use 40+40+60+60 (just not with the same perf levels) jim