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.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 systemresources depends on the operating system, the configuration 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 to the service processor, such as a remote request to turn onthe server. While the server remains connected to power, one or more fans mightcontinue to run. To remove all power from the server, you must disconnect it fromthe 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.Chapter 1. The System x3550 M2 server 33
