Date: Sat, 30 Aug 2008 03:32:04 +0300 From: Giorgos Keramidas <keramida@ceid.upatras.gr> To: Chuck Swiger <cswiger@mac.com> Cc: Matkhamtkha Brekher <gexlie@gmail.com>, freebsd-current@freebsd.org Subject: Re: reboot during upgrade Message-ID: <877i9zuyuz.fsf@kobe.laptop> In-Reply-To: <5AEFCC1D-F758-4EA6-B2FA-180C2C689938@mac.com> (Chuck Swiger's message of "Fri, 29 Aug 2008 16:23:37 -0700") References: <53cc795f0808291515m4fe9e49k903347d1e89ec07e@mail.gmail.com> <5AEFCC1D-F758-4EA6-B2FA-180C2C689938@mac.com>
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On Fri, 29 Aug 2008 16:23:37 -0700, Chuck Swiger <cswiger@mac.com> 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.
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