diff --git a/ocs/diag_note.md b/ocs/diag_note.md
index be9a087..cf418d3 100644
--- a/ocs/diag_note.md
+++ b/ocs/diag_note.md
@@ -1,3 +1,10 @@
+如需调试模块，请先备份参数。
+1. 备份参数: 
+    python3 ocsdiag.py -i 10.57.216.95 -e 2 -s all -c reg_save --sl_file ./main_data/bak_regs/95_bak.yaml
+2. 恢复参数:
+    python3 ocsdiag.py -i 10.57.216.95 -e 2 -s all -c reg_load --sl_file ./main_data/bak_regs/95_bak.yaml
+
+
 0. 根据需求对节点执行power cycle
     ipmitool power cycle