Server Power Features; Turning On The Server - IBM xSeries 236 User Manual

AC power LED: This green LED provides status information about the power
supply. During typical operation, both the ac and dc power LEDs are lit. For any
other combination of LEDs, see the Hardware Maintenance Manual and
Troubleshooting Guide on the IBM xSeries Documentation CD.
Power-cord connector: Connect the power cord to this connector.
Ethernet Activity LED: This LED is on the Ethernet connector. When it flashes, it
indicates that data is being transmitted or received between the server and the
network device that is connected to the connector. The flashing frequency is
proportional to the amount of traffic on the network link.
ASM: Use this connector to connect the server to an Advanced System
Management (ASM) network.
Ethernet link status LED: This LED is on the Ethernet connector. When this LED
is lit, there is an active connection on the Ethernet port.
Remote Supervisor II SlimLine Ethernet: Use this connector to connect the
server to an optional Remote Supervisor Adapter II SlimLine installed in another
server. This connector is enabled when the Remote Supervisor II SlimLine option is
installed.

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 is
shut down; however, the server can respond to requests from the service processor
(also called the baseboard management controller), 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

Approximately 20 seconds after the server is connected to ac power, the
power-control button becomes active, one or more fans might start running, 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
v If the server is connected to an Advanced System Management interconnect
v If your operating system supports the systems-management software for an
v If your operating system supports the Wake on LAN feature, the Wake on LAN
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
automatically when power is restored.
network that contains at least one server with an optional Remote Supervisor
Adapter II SlimLine installed, the server can be turned on from the Remote
Supervisor Adapter II SlimLine user interface.
optional Remote Supervisor Adapter II SlimLine, the systems-management
software can turn on the server.
feature can turn on the server.
Chapter 1. Introducing the IBM xSeries 236 Type 8841 server
13