Turning on the serverApproximately 3 minutes after the server is connected to power, the power-controlbutton becomes active, and one or more fans might start running to provide coolingwhile the server is connected to power. You can turn on the server and start theoperating 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 restartautomatically when power is restored.v If your operating system supports the Wake on LAN feature, the Wake on LANfeature can turn on the server.For 32-bit operating systems only: Some memory is reserved for various systemresources and is unavailable to the operating system. The amount of memory thatis reserved for system resources depends on the operating system, theconfiguration of the server, and the configured PCI options.Turning off the serverWhen you turn off the server and leave it connected to power, the server canrespond to requests from the IMM, such as a remote request to turn on the server.While the server remains connected to power, one or more fans might continue torun. To remove all power from the server, you must disconnect it from the powersource.Important: To view the error LEDs on the system board, leave the serverconnected to a 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 theoperating system.Statement 5:CAUTION:The power control button on the device and the power switch on the powersupply do not turn off the electrical current supplied to the device. The devicealso might have more than one power cord. To remove all electrical currentfrom the device, ensure that all power cords are disconnected from the powersource.12The server can be turned off in any of the following ways:v You can turn off the server from the operating system, if your operating systemsupports this feature. After an orderly shutdown of the operating system, theserver will be turned off automatically.v You can press the power-control button to start an orderly shutdown of theoperating system and turn off the server, if your operating system supports thisfeature.22 System x3650 M3 Types 4255, 7945, and 7949: Installation and User’s Guide
