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LAN activity LEDs (Ethernet): These green LEDs are on the dual Ethernet
connector. When either LED flashes, it indicates that data is being transmitted or
received between the server and the local area network (LAN) device that is
connected to the left or right connector. The flashing frequency is proportional to the
amount of traffic on the network link.
Server power features
When the server is connected to an ac power source but is not turned on, the
operating system does not run, and all core logic except for the baseboard
management controller is shut down; however, the server can respond to requests,
such as a remote request to turn on the server. The power-on LED flashes to
indicate that the server is connected to ac power but not turned on.
Turning on the server
Approximately 20 seconds after the server is connected to ac power, the
power-control button becomes active, and one or more fans might start running to
provide cooling while the server is connected to power. You can turn on the server
and start the operating system by pressing the power-control button.
The server can also be turned on in any of the following ways:
v If a power failure occurs while the server is turned on, the server will restart
v If your operating system supports the Wake on LAN feature, the Wake on LAN
Turning off the server
When you turn off the server and leave it connected to ac power, the server can
respond to requests, such as a remote request to turn on the server. While the
server remains connected to ac power, one or more fans might continue to run. To
remove all power from the server, you must disconnect it from the power source.
Some operating systems require an orderly shutdown before you turn off the server.
See your operating-system documentation for information about shutting down the
operating system.
Statement 5:
CAUTION:
The power control button on the device and the power switch on the power
supply do not turn off the electrical current supplied to the device. The device
also might have more than one power cord. To remove all electrical current
from the device, ensure that all power cords are disconnected from the power
source.
36
System x3455 Types 7984 and 7986: Installation Guide
automatically when power is restored.
feature can turn on the server.
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