Server Power Features - Lenovo System x3550 M4 Installation And Service Manual

• System-locator LED: Use this LED to visually locate the server among other servers. You can use
Systems Director or IMM2 web interface to light this LED remotely.
• System-error LED: When this LED is lit, it indicates that a system error has occurred. An LED on the light
path diagnostics panel is also lit to help isolate the error.

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 integrated management module is shut down.
However, the server can respond to requests from IMM, such as a remote request to turn on the server. The
power-on LED flashes to indicate that the server is connected to an ac 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 5 to 10 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:
• If a power failure occurs while the server is turned on, the server will restart automatically when power
is restored.
• If your operating system supports the Wake on LAN feature, the Wake on LAN feature can turn on the
server.
Notes:
1. 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.
2. Ethernet 1 connector supports Wake on LAN feature.
3. When you turn on the server with the graphical adapters installed, the logo displays on the screen after
approximately 3 minutes. This is normal operation while the system loads.
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 to 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
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Chapter 1 The System x3550 M4 server
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