From owner-freebsd-stable@FreeBSD.ORG Thu Jul 22 13:25:18 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 92B6416A4CE for ; Thu, 22 Jul 2004 13:25:18 +0000 (GMT) Received: from gromit.dlib.vt.edu (gromit.dlib.vt.edu [128.173.49.29]) by mx1.FreeBSD.org (Postfix) with ESMTP id 2AE9843D5E for ; Thu, 22 Jul 2004 13:25:18 +0000 (GMT) (envelope-from paul@gromit.dlib.vt.edu) Received: from hawkwind.Chelsea-Ct.Org (pool-151-199-91-61.roa.east.verizon.net [151.199.91.61]) by gromit.dlib.vt.edu (8.12.11/8.12.11) with ESMTP id i6MDPFxY066267 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Thu, 22 Jul 2004 09:25:17 -0400 (EDT) (envelope-from paul@gromit.dlib.vt.edu) Received: from [192.168.1.25] (zappa [192.168.1.25])i6MDP8rw016590; Thu, 22 Jul 2004 09:25:08 -0400 (EDT) From: Paul Mather To: =?ISO-8859-1?Q?Kov=E1cs_P=E9ter?= In-Reply-To: References: Content-Type: text/plain; charset=iso-8859-1 Message-Id: <1090502706.1435.38.camel@zappa.Chelsea-Ct.Org> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.6 Date: Thu, 22 Jul 2004 09:25:08 -0400 Content-Transfer-Encoding: 8bit cc: freebsd-stable@freebsd.org Subject: Re: Degrade, upgrade 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, 22 Jul 2004 13:25:18 -0000 On Thu, 2004-07-22 at 09:06, Kovács Péter wrote: > Hello guys, > > I have a system running FreeBSD 5.2.1 and want to degrade it > to FreeBSD 4.10 (because the program I want to use only runs > and supported on that platform) without reinstalling the system. > Is it enough to cvsup to the RELENG_4 branch and recompile > the system? > Should I recompile all the programs that were previously > compiled in the FreeBSD 5 environment? > > I would also like to know how this works backwards (which is > the common way), so to upgrade from 4 to branch 5. Is there > some kind of tutorial for this? I doubt there is a tutorial because, so far as I know, downgrading is neither officially supported nor guaranteed to work. (I'd say this is especially true when jumping down major release numbers.) In the case of going from 5.2.1 -> 4.10 it's likely to be doomed immediately because 5.2.1 uses UFS2 by default during installation. UFS2 is not supported in 4.10. So, unless you happen to be using UFS1 filesystems on your system being downgraded, the 4.10 kernel will choke. (See http://sixshooter.v6.thrupoint.net/jeroen/faq.html for a UFS2 FAQ.) Given you'd have to dump/newfs/restore anyway, folks will tell you it'd be easier to do a clean install of 4.10, too. Good luck! Cheers, Paul. -- e-mail: paul@gromit.dlib.vt.edu "Without music to decorate it, time is just a bunch of boring production deadlines or dates by which bills must be paid." --- Frank Vincent Zappa