Restoring GRUB in the MBR
Start up the system using the installation DVD (procedure tested with SuSE 10.0) in the rescue mode.
Login as root user.
to get the disk partitions and labels.
Then mount the "/boot" (or the "/" partition when there is no separate "/boot" partiton) on "/mnt". Finally use the "grub-install" command.
Assuming that /dev/sda is the device on which you want to update the MBR and that the partition /dev/sda5 contains the "/" partition:
mount /dev/sda5 /mnt grub-install --root-directory=/mnt /dev/sda
Rebuilding the software installation package cache used by Yast/Zypper
During a system online update or an installation of a software package the error message "SQL logic error or missing database" is shown.
Solution (at least for SuSE 10.3):
rm /var/cache/zypp/zypp.db zypper refresh