IBM x 340 Series, Hardware Maintenance Manual

Page: 17 / 188

General information
9
• You can turn off the server by pressing the Power Control button on the front of
the server. Pressing the Power Control button starts an orderly shutdown of the
operating system, if this feature is supported by your operating system, and
places the server in standby mode.
Note: After turning off the server, wait at least 5 seconds before pressing the
Power Control button to power the server on again.
• You can press and hold the Power Control button for more than 4 seconds to
cause an immediate shutdown of the server and place the server in standby
mode. You can use this feature if the operating system hangs.
• You can disconnect the server power cords from the electrical outlets to shut off
all power to the server.
Note: Wait about 15 seconds after disconnecting the power cords for your
system to stop running. Watch for the System Power light on the operator
information panel to stop blinking.
Reset Button:
Press this button to reset the server and run the power-on self-test
(POST).
AC Power Light: This light provides status information about the power supply.
During normal operation, both the AC and DC Power lights are on. For any other
combination of lights, see “Power supply LED errors” on page 119.
Operator Information Panel: The lights on this panel give status information for your
server. See “Operator information panel” on page 10 for more information.
DC Power Light: This light provides status information about the power supply.
During normal operation, both the AC and DC Power lights are on. For any other
combination of lights, see “Power supply LED errors” on page 119 .
Hard Disk 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. When the 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.
Hard Disk Activity Light: Each of the hot-swap drive bays has a Hard Disk Activity
light. When this green light is flashing, the controller is accessing the drive.