IBM 8669 - Eserver xSeries 342, Hardware Maintenance Manual

Page: 17 / 156

Controls and indicators
The most commonly used controls and status indicators are on the front panel of
the server.
System power light (green)
Power control button
Reset button
Operator information panel
Hard disk drive activity light (green) Hard disk drive status light (amber)
Serial number
Power-control-button shield (if installed)
System Power Light: When this green light is on, system power is present in the
server. When this light flashes, the server is in standby mode (the system power
supply is turned off and AC current is present). When this light is off, either a power
supply, AC power, or a light has failed.
Attention: If this light is off, it does not mean there is no electrical current present
in the server. The light might be burned out. To remove all electrical
current from the server, you must unplug the server power cords from
the electrical outlets or from the UPS.
Power-control button shield: You can install this circular disk over the
power-control button to prevent accidental manual power-off. This disk is provided
with the server.
Power-control Button: Press this button to manually turn the server on or off.
Reset Button: Press this button to reset the server and run the power-on self-test
(POST).
Operator Information Panel: The lights on this panel give status information for
the server. See “Operator information panel” on page 8 for more information.
Hard Disk Drive Status Light: Each of the hot-swap drive bays has a Hard Disk
Status light. When this amber light is on continuously, the drive has failed (only if
RAID is installed). If a ServeRAID adapter is installed and this light flashes slowly
(one flash per second), the drive is being rebuilt. When the light flashes rapidly
(three flashes per second), the controller is identifying the drive.
General information
7