+grub --batch --no-floppy --device-map=$device_map <<EOF >/dev/null 2>&1
+quit
+EOF
+if [ ! -s $device_map ]; then
+ if [ -f $device_map.old ]; then
+ mv -f $device_map.old $device_map
+ fi
+else
+ rm -f $device_map.old
+fi
+echo -n " grub4"
+
+# install GRUB loader
+install_device=$(grep '^(hd0)' $device_map | \
+ sed -e 's%[^[:space:]]*[[:space:]]*\([^[:space:]]*\)%\1%')
+if [ -z "$install_device" ]; then
+ echo "."
+ echo "CN: FATAL ERROR while detecting boot disk!"
+ echo "CN: Do not reboot your server and report this to OTRS immediately!"
+ exit 1
+fi
+if ! grub-install --no-floppy "$install_device" >/dev/null 2>&1; then