[CentOS] Re: CentOS 4.5 system doesn't boot after installing
Alfred von Campe
alfred at von-campe.com
Tue Sep 25 10:38:35 UTC 2007
> Out of interest, is this something that is always required when
> upgrading Grub?
> i.e. should one always manually run "grub-install" /dev/XXX" after
> doing so?
No, it shouldn't. But in my case, I didn't "upgrade grub". I simply
did a "yum update" which installed, among other things, a new kernel,
so a reboot was needed. And when I rebooted, grub wouldn't start.
So I booted into rescue mode from the CentOS CD #1, and did a "rpm -e
grub kernel" followed by "yum install grub kernel". This did not fix
the problem. I had to boot into rescue mode again and do a "grub-
install /dev/sda". The big question remains, what happened on my
system that corrupted the MBR. I could have been anything at all
since the last time I rebooted (about a month ago) and not
necessarily the "yum update".
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