minor: adding balancer config scheduling disable

Author: Sam Kleinman

source/administration/sharding.txt

@@ -697,13 +697,6 @@ be able to migrate chunks:
 
       db.settings.update({ _id : "balancer" }, { $set : { activeWindow : { start : "23:00", stop : "6:00" } } }, true )
 
-To turn off the balancing window:
-
-  .. code-block:: javascript
-
-     use config
-     db.settings.update({ _id : "balancer" }, { $unset : { activeWindow : true })
-
 .. note::
 
    The balancer window must be sufficient to *complete* the migration
@@ -713,6 +706,19 @@ To turn off the balancing window:
    patterns, it is important to ensure that the balancing window you
    select will be sufficient to support the needs of your deployment.
 
+Remove Balancing Window Schedule
+--------------------------------
+
+If you have :ref:`set the balancing window
+<sharding-schedule-balancing-window>` and wish to remove the schedule
+so that the balancer is always running, issue the following sequence
+of operations:
+
+.. code-block:: javascript
+
+   use config
+   db.settings.update({ _id : "balancer" }, { $unset : { activeWindow : true })
+
 .. _sharding-balancing-disable-temporally:
 
 Disable the Balancer