extra hd: disabled blkid cache use.

src/scripts/scanhd

@@ -8,7 +8,7 @@ case "$1" in
 		cat /proc/partitions | awk '{print $4 " " $3 }' | grep -v name | grep -v "^[:space:]*$" | \
 			while read device size; do
 				[ -z "${device}" ] && continue
-				echo "${device};${size};$(blkid -s UUID -o value /dev/${device});"
+				echo "${device};${size};$(blkid -c /dev/null -s UUID -o value /dev/${device});"
 			done > /var/ipfire/extrahd/partitions
 		;;
 	*)