Server Power Features - IBM System x3755 M3 7164 Installation And User Manual

Locator LED: Use this LED to visually locate the server among other servers. You
can use IBM Systems Director to light this LED remotely. This LED is functionally
equivalent to the locator LED on the front of the server.

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
baseboard management controller (iBMC) is shut down; however, the server can
respond to requests from the iBMC, 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 1 minute 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.
Note: Approximately 1 minute after the server is turned on, the screen displays the
boot process status. Depending on your server configuration, the operating system
welcome screen displays after 1 - 3 minutes.
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 The systems-management software can turn on the server remotely.
v If your operating system supports the Wake on LAN feature, the Wake on LAN
Note: 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 ac power, the server can
respond to requests from the iBMC, 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:
automatically when power is restored.
feature can turn on the server.
Chapter 1. The System x3755 M3 server
17