From owner-freebsd-stable@FreeBSD.ORG Thu Oct 28 08:51:15 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 8A61A16A4CE for ; Thu, 28 Oct 2004 08:51:15 +0000 (GMT) Received: from ip212-226-164-78.adsl.kpnqwest.fi (ip212-226-164-93.adsl.kpnqwest.fi [212.226.164.93]) by mx1.FreeBSD.org (Postfix) with ESMTP id 9CEF143D55 for ; Thu, 28 Oct 2004 08:51:14 +0000 (GMT) (envelope-from mjraiha@ip212-226-164-78.adsl.kpnqwest.fi) Received: from ip212-226-164-78.adsl.kpnqwest.fi (localhost [127.0.0.1]) i9S8pDoL016871; Thu, 28 Oct 2004 11:51:13 +0300 (EEST) (envelope-from mjraiha@ip212-226-164-78.adsl.kpnqwest.fi) Received: (from mjraiha@localhost)i9S8pCNk016870; Thu, 28 Oct 2004 11:51:12 +0300 (EEST) (envelope-from mjraiha) Date: Thu, 28 Oct 2004 11:51:12 +0300 From: Marko Raiha To: secmgr Message-ID: <20041028085112.GA16832@daemon.adsl.kpnqwest.fi> References: <200410270027.47092.miha@ghuug.org> <1098855222.15580.81.camel@emperor> <20041027100229.GB6391@daemon.adsl.kpnqwest.fi> <417FBA6F.7040406@jim-liesl.org> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <417FBA6F.7040406@jim-liesl.org> User-Agent: Mutt/1.4.2.1i X-Time-Zone: FI EET, 3 hours east of GMT. X-Operating-System: FreeBSD 5.3-RC1 i386 cc: freebsd-stable@freebsd.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: Thu, 28 Oct 2004 08:51:15 -0000 Hi, On Wed, Oct 27, 2004 at 09:10:39AM -0600, secmgr wrote: > The reason is empirically derived. When I created a 7 disk raid 5 set > using "len 0" or all the space available, the raid set would be corrupt > after initializing. Every time. When I reserved back that extra > space, no corruption. > (freebsd 4.10-p3) There was a thread on this a few days ago. Thanks about pointing to this another thread. I read the thread and one thing is still a bit unclear. Do you mean by leaving 64 blocks unused to leave it unused at the beginning of disk before vinum partition (when doing partition to vinum by disklabeling freebsd slice) like this: # /dev/aacd2s1: 8 partitions: # size offset fstype [fsize bsize bps/cpg] c: 143347932 0 unused 0 0 h: 143347868 64 vinum or somewhere in subdisk as you said? I guess that inadvertently not right terms were used ("subdisk" instead of "disk"), because terminology with vinum is a bit complicated. All documentations I have found says that only 16 block should be left unused at the beginning of the disk like this: # /dev/aacd2s1: 8 partitions: # size offset fstype [fsize bsize bps/cpg] c: 143347932 0 unused 0 0 h: 143347916 16 vinum Regards, -- Marko Räihä