IBM 8482 User Manual - Page 17
Server power features, Turning on the server
UPC - 000435244659
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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 is shut down; however, the server can respond to remote requests to turn on the server. The power-on LED flashes to indicate that the server is connected to an ac power source but is not turned on (standby mode). Turning on the server Approximately 20 seconds after the server is connected to ac power, the power-control button becomes active, and 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. v If the server is connected to an Advanced System Management (ASM) interconnect network that contains at least one server with an optional Remote Supervisor Adapter II installed, the server can be turned on from the Remote Supervisor Adapter II user interface. v If the operating system supports the systems-management software for an optional Remote Supervisor Adapter II, the systems-management software can turn on the server. v If the operating system supports the Wake on LAN® feature, the Wake on LAN feature can turn on the server. v If an optional Remote Supervisor Adapter II is installed in the server, the server can be turned on from the Remote Supervisor Adapter II user interface. 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 When you turn off the server and leave it connected to ac power, the server can respond to remote requests to turn on the server. 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 the operating-system documentation for information about shutting down the operating system. Chapter 1. Introduction 7