diff -r 249d57f82cf8 -r 364ca73ba463 Hardware/HDD/HDD.cs
--- a/Hardware/HDD/HDD.cs	Sun Apr 25 12:35:16 2010 +0000
+++ b/Hardware/HDD/HDD.cs	Sun Apr 25 13:16:28 2010 +0000
@@ -94,7 +94,8 @@
     public void Update() {
       if (count == 0) {
         SMART.DriveAttribute[] attributes = SMART.ReadSmart(handle, drive);
-        temperature.Value = attributes[attribute].RawValue[0];
+        if (attributes != null && attribute < attributes.Length) 
+          temperature.Value = attributes[attribute].RawValue[0];
       } else {
         temperature.Value = temperature.Value;
       }