HL Unit
Front LED Indicators and Buttons for Hardware Status Monitoring
On an HL unit, the following control panel buttons, icons, and LED indicators for hard- ware status monitoring display on the right side of the front panel:
| LED Indicator Key |
| PWR = Power |
| HD = HDD Activity |
| NIC1 = LAN 1 |
| NIC2 = LAN 2 |
| OH = Overheat |
HL chassis control panel | UID = Unique IDentifier |
The buttons and LED indicators for the depicted icons function as follows:
UID (button) – On an HL unit, when the UID button is pressed, a steady blue LED displays on both the front and rear of the chassis (see also Rear of Chassis). These indicators are used for easy location of the chassis in a large stack configuration. The LED remains on until the button is pressed a second time.
Overheat/Fan Fail (icon) – This LED is unlit unless the chassis is overheated. A flashing red LED indicates a fan failure. A steady red LED (on and not flashing) indicates an overheating condition, which may be caused by cables obstructing the airflow in the system or the ambient room temperature being too warm.
NIC2 (icon) – A flashing green LED indicates network activity on LAN2.
NIC1 (icon) – A flashing green LED indicates network activity on LAN1.
HDD (icon) – In addition to displaying in the control panel, this icon also displays on the front panel on each hard drive carrier. A green LED indicates hard drive activity. An unlit LED on a drive carrier may indicate a hard drive failure.
Power (icon) – The LED is unlit when the server is turned off. A steady green LED indicates power is being supplied to the unit’s power supplies. (See also Rear of Chassis.) A steady amber
Power (button) – When the power button is pressed, the main power to the server is turned on. When the power button is pressed again, the main power to the server is removed but standby power is still supplied to the server.
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