diff --git a/disks_checks.md b/disks_checks.md
index f3adb40..7109a0f 100644
--- a/disks_checks.md
+++ b/disks_checks.md
@@ -2,9 +2,15 @@ Bienvenue sur le Wiki.
 
 ```
 # info and test results
-smartctl -a /dev/sda -d cciss,0 #0,1,2,3,4
+smartctl -a /dev/sda -d cciss,0 #0,1,2,3,
 
 # tests
 smartctl -t short /dev/sda -d cciss,3
 
+
+# check for errors
+smartctl -l error /dev/sda -d cciss,1
+# ignore non medium errors, if the number does not grow	
+
+
 ```
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