Flashing slowly (once per second): The server is turned off and is ready to
be turned on. You can press the power-control button to turn on the server.
Lit: The server is turned on.
v System-locator LED: Use this LED to visually locate the server among other
servers. You can use IBM Systems Director or IMM2 web interface to light this
LED remotely.
v 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:
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.
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 IBM
logo displays on the screen after approximately 3 minutes. This is normal
operation while the system loads.
Chapter 1. The IBM System x3550 M4 server 23
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