Added fix for BSC#1223355.

xml/deployment_prepare_config_device.xml

@@ -201,8 +201,7 @@
         The <literal>storage</literal> attribute is used to configure
         partitions and RAID, define file systems, create files, etc. To define
         partitions, use the <literal>disks</literal> attribute. The
-        <literal>filesystem</literal> attribute is used to format partitions
-        and define mount points of particular partitions. The
+        <literal>filesystem</literal> attribute is used to format partitions. The
         <literal>files</literal> attribute can be used to create files in the
         file system. Each of the mentioned attributes is described in the
         following sections.
@@ -311,6 +310,13 @@
       </section>
       <section xml:id="sec-storage-filesystem">
         <title>The <literal>filesystem</literal> attribute</title>
+        <note>
+          <title>&ignition; does not perform modifications to mount units</title>
+          <para>
+            The <literal>file system</literal> attribute does not modify mount units. If you add a new partition or remove an
+            existing partition, you must manually adjust the mount units. 
+          </para>
+        </note>
         <para>
           <literal>filesystem</literal> must contain the following
           attributes: