From owner-freebsd-current@FreeBSD.ORG Sat Aug 30 00:32:18 2008 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 7EE72106566C for ; Sat, 30 Aug 2008 00:32:18 +0000 (UTC) (envelope-from keramida@ceid.upatras.gr) Received: from igloo.linux.gr (igloo.linux.gr [62.1.205.36]) by mx1.freebsd.org (Postfix) with ESMTP id EF59A8FC13 for ; Sat, 30 Aug 2008 00:32:17 +0000 (UTC) (envelope-from keramida@ceid.upatras.gr) Received: from kobe.laptop (adsl85-153.kln.forthnet.gr [77.49.52.153]) (authenticated bits=128) by igloo.linux.gr (8.14.3/8.14.3/Debian-5) with ESMTP id m7U0W6Dt027793 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT); Sat, 30 Aug 2008 03:32:12 +0300 Received: from kobe.laptop (kobe.laptop [127.0.0.1]) by kobe.laptop (8.14.3/8.14.3) with ESMTP id m7U0W5CJ040711; Sat, 30 Aug 2008 03:32:05 +0300 (EEST) (envelope-from keramida@ceid.upatras.gr) Received: (from keramida@localhost) by kobe.laptop (8.14.3/8.14.3/Submit) id m7U0W4aj040710; Sat, 30 Aug 2008 03:32:04 +0300 (EEST) (envelope-from keramida@ceid.upatras.gr) From: Giorgos Keramidas To: Chuck Swiger References: <53cc795f0808291515m4fe9e49k903347d1e89ec07e@mail.gmail.com> <5AEFCC1D-F758-4EA6-B2FA-180C2C689938@mac.com> Date: Sat, 30 Aug 2008 03:32:04 +0300 In-Reply-To: <5AEFCC1D-F758-4EA6-B2FA-180C2C689938@mac.com> (Chuck Swiger's message of "Fri, 29 Aug 2008 16:23:37 -0700") Message-ID: <877i9zuyuz.fsf@kobe.laptop> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.0.60 (berkeley-unix) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-MailScanner-ID: m7U0W6Dt027793 X-Hellug-MailScanner: Found to be clean X-Hellug-MailScanner-SpamCheck: not spam, SpamAssassin (not cached, score=-3.839, required 5, autolearn=not spam, ALL_TRUSTED -1.80, AWL 0.56, BAYES_00 -2.60) X-Hellug-MailScanner-From: keramida@ceid.upatras.gr X-Spam-Status: No Cc: Matkhamtkha Brekher , freebsd-current@freebsd.org Subject: Re: reboot during upgrade X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 30 Aug 2008 00:32:18 -0000 On Fri, 29 Aug 2008 16:23:37 -0700, Chuck Swiger wrote: >> what consequences would appear if i'll reboot the machine once during >> the upgrade? > > If you don't reboot in order to be using the new kernel before > installing the new userland, you'll install critical things like sh > and make which might not run using the old kernel. You might find > that the installworld part fails in the middle, and the system is left > in an unusable state which is very hard to recover from. Not to mention that if installworld suceeds but the new kernel panics at every boot, you may end up with a userland that uses 'new' stuff to work but with an unbootable kernel. Rolling back to kernel.old may work (and it usually does), but it's not a safe bet all the time.