diff --git a/hard_disks.md b/hard_disks.md
index 6aab7d2..814e56e 100644
--- a/hard_disks.md
+++ b/hard_disks.md
@@ -14,5 +14,12 @@ Mounting the new VD
 * create an access folder, maybe at //mnt/backup
 * run the mount `mount /dev/sdb1 /mnt/backup`
 * edit fstab by adding
+    * using device name
+    ```
     //dev/sdb1  /mnt/backup ext4    defaults    1   2
+    ```
+    * using UUID (do `sudo blkid` to get the UUID)
+    ```
+    UUID="86e81045-a0dc-4881-8ddb-5ef25834ea5a" /datadrive  xfs     defaults,nofail 1       2
+    ```
 * somehow in the process an new systemctl service module is loaded based on fstab at runs at boot