Server power features
When the server is connected to a power source but is not turned on, the operating
system does not run, and all core logic except for the service processor (the
integrated management module) is shut down; however, the server can respond to
requests from the service processor, such as a remote request to turn on the server.
The power-on LED flashes to indicate that the server is connected to a power
source but is not turned on.
Turning on the server
Use this information to turn on the server.
Approximately 5 seconds after the server is connected to power, one or more fans
might start running to provide cooling while the server is connected to power and
the power-on button LED will blink quickly. Approximately 20 to 40 seconds after
the server is connected to power, the power-control button becomes active (the
power-on LED will blink slowly), and one or more fans might start running to
provide cooling while the server is connected to power. You can turn on the server
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
automatically when power is restored.
v If your operating system supports the Wake on LAN feature, the Wake on LAN
feature can turn on the server.
Note: When 4 GB or more of memory (physical or logical) is installed, 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
Use this information to turn off the server.
When you turn off the server and leave it connected to power, the server can
respond to requests from the service processor, 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 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
Chapter 1. The IBM System x3550 M3 server 33
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