Warning about VM with VMHA not restarting when primary storage is put on maintenance (#619)

Author: abh1sar

source/adminguide/storage.rst

@@ -259,6 +259,10 @@ The CloudStack will bring the device back online and attempt to start
 all guests that were running at the time of the entry into maintenance
 mode.
 
+.. note::
+   HA-Enabled Instances will also be stopped when the primary storage is put into maintenance mode.
+   It is recommended to migrate any business-critical Instances to alternate primary storage before initiating maintenance.
+
 Browsing files on a primary storage
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