diff --git a/delfin/drivers/dell_emc/vplex/vplex_stor.py b/delfin/drivers/dell_emc/vplex/vplex_stor.py
index 10b808c47..adad83769 100644
--- a/delfin/drivers/dell_emc/vplex/vplex_stor.py
+++ b/delfin/drivers/dell_emc/vplex/vplex_stor.py
@@ -324,18 +324,39 @@ def get_cluster_used_capacity(self, cluster_name):
             get_virtual_volume_summary_resp(cluster_name)
         try:
             custom_data = resposne_summary.get("custom-data")
-            find_capacity = re.findall(
-                r"capacity\s+is\s+(([0-9]*(\.[0-9]{1,3}))|([0-9]+))",
-                custom_data)
+            find_capacity = re.findall(r"capacity\s+is\s+(("
+                                       r"[0-9]*(\.[0-9]{1,3})"
+                                       r"[a-zA-Z])|([0-9]+)[a-zA-Z])",
+                                       custom_data)
             find_capacity_str = find_capacity[-1][0]
-            find_capacity_float = float(find_capacity_str)
-            capacity = int(find_capacity_float * units.Ti)
+            capacity = self.get_capacity_by_unit(find_capacity_str)
         except Exception as e:
             LOG.error("Storage used capacity, cluster %s analyse error %s" %
                       cluster_name, six.text_type(e))
             raise e
         return capacity
 
+    def get_capacity_by_unit(self, find_capacity_str):
+        if 'G' in find_capacity_str:
+            find_capacity_float = float(
+                find_capacity_str[:find_capacity_str.index('G')])
+            capacity = int(find_capacity_float * units.Gi)
+        elif 'T' in find_capacity_str:
+            find_capacity_float = float(
+                find_capacity_str[:find_capacity_str.index('T')])
+            capacity = int(find_capacity_float * units.Ti)
+        elif 'M' in find_capacity_str:
+            find_capacity_float = float(
+                find_capacity_str[:find_capacity_str.index('M')])
+            capacity = int(find_capacity_float * units.Mi)
+        elif 'K' in find_capacity_str:
+            find_capacity_float = float(
+                find_capacity_str[:find_capacity_str.index('K')])
+            capacity = int(find_capacity_float * units.Ki)
+        else:
+            capacity = int(find_capacity_str)
+        return capacity
+
     def list_controllers(self, context):
         """List all storage controllers from storage system."""
         ct_list = []
@@ -711,16 +732,3 @@ def get_attributes_from_response(response):
                     child_map[name] = value
                 attributes_list.append(child_map)
         return attributes_list
-
-
-@staticmethod
-def handle_detail_list(detail_info, detail_map, split):
-    detail_arr = detail_info.split('\n')
-    for detail in detail_arr:
-        if detail is not None and detail != '':
-            strinfo = detail.split(split, 1)
-            key = strinfo[0]
-            value = ''
-            if len(strinfo) > 1:
-                value = strinfo[1]
-            detail_map[key] = value