Asus ESC8000 G3 User Manual page 79

3. CATT LED (CATTERR1)
The CATT LED indicates that the system has experienced a fatal or catastrophic error
and cannot continue to operate.
4. Hard disk activity LED (HDLED1)
This LED is for the storage add-on card cable connected to the SATA or SAS add-on
card. The read or write activities of any device connected to the SATA or SAS add-on
card causes the front panel LED to light up.
ASUS ESC8000 G3
4-19