howto/drbd.md

@@ -61,7 +61,11 @@ Finding which host is associated with this device is easy: just call
     root@fsn-node-01:~# gnt-node list-drbd fsn-node-01 | grep 18
     fsn-node-01.torproject.org    18 gettor-01.torproject.org          disk/0 primary   fsn-node-02.torproject.org
 
-It's the host `gettor-01`.
+It's the host `gettor-01`. In this specific case, you can either try
+to figure out what's wrong with DRBD or (more easily) just change the
+secondary with:
+
+    gnt-instance replace-disks -n fsn-node-03 gettor-01
 
 ## Deleting a stray device