[syslinux] Stumped by extlinux After OS Upgrade
H. Peter Anvin
hpa at zytor.com
Wed Nov 3 14:53:40 PDT 2010
On 11/03/2010 09:22 AM, John.Florian at dart.biz wrote:
>
> I've never had to reinstall grub unless something happened to the MBR. It
> just seems to be able to find its various stages. I'm still not clear
> what extlinux was doing in my case. I suspect the first stage was loading
> fine, but it couldn't find the next stage due to the shuffling my update
> script performs. I also suspect the extlinux --update repairs that link.
> Maybe that's all wrong. Maybe the stage transfer went fine, but the odd
> behavior was simply version incompatibility between the stages.
>
That's because Grub by default stashed information in unreserved parts
of your disk (specifically, the gap between the MBR and the first
partition, which most partition programs create.) I consider this
unsafe, since a lot of tools are known to muck with this space in a
completely uncoordinated fashion.
-hpa
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