Server Power Features - Lenovo System x3250 M5 Installation And Service Manual

• NMI button: Press this button to force a nonmaskable interrupt to the microprocessor. It allows you to
blue screen the server and take a memory dump (use this button only when directed by the Lenovo
service support). You might have to use a pen or the end of a straightened paper clip to press the button.
• PCI slot 1: Dedicated to ServeRAID H1110 SAS/SATA controller
• PCI slot 2: Support one PCI Express Gen3 x8 half-length, full-height adapter

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 II (IMM2) is shutdown.
However, the server can respond to requests from Integrated Management Module II (IMM2), 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 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 ac 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 1 to 3 minutes after the server is connected to ac 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.
Step 1. Press the power-on button to turn on the server.
Step 2. 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.
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 ac power, the server can respond to requests from
Integrated Management Module II (IMM2), 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.
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Lenovo System x3250 M5Installation and Service Guide