- add some notes

szhou0116 · szhou0116 · commit 1d7adac71afd · 2019-11-06T13:59:51.000-08:00
diff --git a/purestorage/purestorage.py b/purestorage/purestorage.py
@@ -740,6 +740,10 @@ def promote_volume(self, volume):
                   volume's latest promotion status.
         :rtype: ResponseDict
 
+        .. note::
+
+            Requires use of REST API 1.18 or later.
+
         """
         return self.set_volume(volume, requested_promotion_state="promoted")
 
@@ -752,6 +756,10 @@ def demote_volume(self, volume):
                   volume's latest promotion status.
         :rtype: ResponseDict
 
+        .. note::
+
+            Requires use of REST API 1.18 or later.
+
         """
         return self.set_volume(volume, requested_promotion_state="demoted")
 
