From: Rasmus Plewe (rplewe_at_suse.de)
Date: Fri Dec 21 2007 - 21:27:52 CET
Date: Fri, 21 Dec 2007 21:27:52 +0100 From: Rasmus Plewe <rplewe@suse.de> Message-ID: <20071221202752.GB18380@reboot.suse.de> Subject: Re: [suse-sles-e] Upgrade to SLES9 SP4 results in non-bootable systems when using SATA
On Fri, Dec 21, 2007 at 11:55:51AM -0800, Alexei_Roudnev wrote:
>
> One (very serious) problem with SLES is that it do not keep PREVIOUS kernel
> during the upgrades, so if
> upgrade failed, you need to go thru a manual process of _boot from CD, copy
> kernel and initrd files from the healthy server, edut grub menu. reboot,
> and now install a correct kernel).
You can do that. Of course, you can also boot from CD, mount the root
file system, chroot, install the old kernel rpm and edit menu.lst. But I
admit that this is still far from elegant.
> It is a bad thing, because it is VERY
> EASY to maintain previous kernel in Linux(es).
Unfortunately that is not so in every case.
> In my experience, there are some problems with SLES9 SP4 upgrade (esp. if
> seen all beta history - there was a lot of mess in the very end of the beta
> testingm and it shjows that upgrade was not properly beta-tested before the
> release).
If we wouldn't do proper testing we wouldn't have had all this mess,
because we wouldn't have discovered the issue before the release. ;-)
This last-minute problem was introduced in the RC phase, when a fix for
one thing caused problems in a seemingly different area (simplifying the
issue a bit). It turned out that the resulting problem then was far from
trivial to fix and needed several iterations.
This is unfortunate at that stage, but it's an inherent risk in complex
software developement. It happens frequently that you introduce new
problems by fixing old ones[0], and that's the reason we are very
conservative towards the end of a developement cycle. However, this time
the remaining risk hit us with full force.
Regards,
Rasmus
[0] There's no such thing as a bug fix, only a bug change.
-- Rasmus Plewe --- Linux Beta Test Coordinator SUSE LINUX Products GmbH, GF: Markus Rex, HRB 16746 (AG Nuernberg) Maxfeldstrasse 5, D-90409 Nuernberg --------------------------------------------------------------------- To unsubscribe, e-mail: suse-sles-e-unsubscribe@suse.com For additional commands, e-mail: suse-sles-e-help@suse.com
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