diff --git a/interface/ri_oper.py b/interface/ri_oper.py
index 70e499f..12b49b0 100644
--- a/interface/ri_oper.py
+++ b/interface/ri_oper.py
@@ -151,6 +151,7 @@ class MakeRaidConfigure(Operation):
 
 class Mount(Operation):
     """class for mount partition"""
+    # dict saved only device and mount point
     dict={}
     def __init__(self,scr):
         Operation.__init__(self, 'Mount partition', u'挂载分区', 'mount_partition.sh',scr)