diff --git a/plugins/nova/nova_instance_ b/plugins/nova/nova_instance_
index 36d98778..8bd19271 100755
--- a/plugins/nova/nova_instance_
+++ b/plugins/nova/nova_instance_
@@ -66,7 +66,7 @@ def get_name(metric, code):
     if metric == "power_state":
         return power_state.name(code)
     elif metric in ["root_gb", "ephemeral_gb"]:
-        return "%d_gb", code
+        return "%d gb" % code
     else:
         return code
 
@@ -79,7 +79,7 @@ def print_config(metric):
     print 'graph_scale no'
     print 'graph_info This graph shows the number of instances by %s' % metric
     for state in states:
-        print '%s.label %s' % (state, get_name(state))
+        print '%s.label %s' % (state, get_name(metric, state))
         print '%s.draw LINE2' % state
         print '%s.info %s IPs' % (state, state)