IBM System x3100 M3, Инструкция по установке и эксплуатации

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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 service processor
(the baseboard management controller) is shut down; however, the server can
respond to requests to 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 ac
power but is not turned on.
Turning on the server
Note: If you connect the server to an ac power source for the first time, do not
press the power-control button until the power LED flashes.
You can turn on the server and start the operating system 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 if BIOS Restore AC Power Loss is enabled.
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 peripheral component interconnect (PCI) devices.
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System x3100 M3 Type 4253: Installation and User’s Guide