IBM 8841 - eServer xSeries 236 Installation Manual

Also see for 8841 - eServer xSeries 236: Option installation guide

Contents

Server power featuresWhen the server is connected to an ac power source but is not turned on, theoperating system does not run, and all core logic except for the service processor isshut down; however, the server can respond to requests from the service processor(also called the baseboard management controller), such as a remote request toturn on the server. The power-on LED flashes to indicate that the server isconnected to ac power but is not turned on.Turning on the serverApproximately 20 seconds after the server is connected to ac power, thepower-control button becomes active, one or more fans might start running, and youcan turn on the server and start the operating system by pressing the power-controlbutton.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 the server is connected to an Advanced System Management interconnectnetwork that contains at least one server with an optional Remote SupervisorAdapter II SlimLine installed, the server can be turned on from the RemoteSupervisor Adapter user interface.v If your operating system supports the systems-management software for anoptional Remote Supervisor Adapter II SlimLine, the systems-managementsoftware can turn on the server.v If your operating system supports the Wake on LAN ® feature, the Wake on LANfeature can turn on the server.Note: When 4 GB or more of memory (physical or logical) is installed, somememory is reserved for various system resources and is unavailable to theoperating system. The amount of memory that is reserved for system resourcesdepends on the operating system, the configuration of the server, and theconfigured PCI options.Chapter 3. Server controls, LEDs, and power 29