Grub failure in FC10

Yesterday, I tried to upgrade a server from FC9 to FC10. The upgrade process was ok. However, grub did not boot up. Some hints from searching redhat suggested to use FC9 dvd to rescue. The steps are as follows:

- Boot with FC9 DVD, select rescue mode
- chroot /mnt/sysimage
- grub-install /dev/sda
- reboot again to fix the problem

It worked and the grub was rescued.

I have to memorize these steps. The same problem might happen again when I upgrade FC10 to FC11.

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