Turning on the server
Approximately 3 minutes after the server is connected to 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
For 32-bit operating systems only: Some memory is reserved for various system
resources and is unavailable to the operating system. The amount of memory that
is reserved for system resources depends on the operating system, the
configuration of the server, and the configured PCI options.
Turning off the server
When you turn off the server and leave it connected to power, the server can
respond to requests from the IMM, such as a remote request to turn on the server.
While the server remains connected to power, one or more fans might continue to
run. To remove all power from the server, you must disconnect it from the power
Important: To view the error LEDs on the system board, leave the server
connected to a 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
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
The server can be turned off in any of the following ways:
v You can turn off the server from the operating system, if your operating system
v You can press the power-control button to start an orderly shutdown of the
System x3650 M3 Types 4255, 7945, and 7949: Installation and User's Guide
automatically when power is restored.
feature can turn on the server.
supports this feature. After an orderly shutdown of the operating system, the
server will be turned off automatically.
operating system and turn off the server, if your operating system supports this