Intel SBXL52 Hardware Maintenance Manual - Page 19
Blade server power, controls, and indicators, The following information describes the power features
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3 Blade server power, controls, and indicators The following information describes the power features, how to turn on and turn off the blade server, and what the controls and indicators mean. Turning on the blade server After you connect the SBCE unit to ac power, the blade server can start in any of the following ways: • You can press the power-control button on the front of the blade server (behind the control panel door) to start the server, if local power is enabled. Notes: 1. After you plug the power cords of your SBCE unit into the power distribution unit (PDU), wait until the power-on LED on the blade server flashes slowly before pressing the blade server power-control button. This should take about 20 seconds. During this time, the service processor in the SBCE management module is initializing; therefore, the powercontrol button on the blade server does not respond. 2. While the server is powering up, the power-on LED on the front of the server is lit. • If a power failure occurs, the SBCE unit and then the blade server can start automatically when power is restored (if the blade server is configured through the SBCE management module to do so). • You can turn on the blade server remotely by means of the service processor in the SBCE management module. ✏ Important Blade server startups initiated from the network will be faster if you connect the DHCP server to the Ethernet switch in switch bay 2. This is because the BIOS code in the blade server "sees" the bottom Ethernet controller first, and the bottom Ethernet controller in each blade server is associated with the switch in switch bay 2. • If your operating system supports the Wake on LAN feature and the blade server power-on LED is flashing slowly, the Wake on LAN feature can turn on the blade server (if the SBCE management module has not disabled the Wake on LAN feature). ✏ NOTE The Wake on LAN (WOL) feature is enabled permanently in the blade server BIOS code. The WOL enabled/disabled setting for each blade server slot is stored in the management module NVRAM. The default setting for each blade server slot is Enabled. To disable WOL for one or more blade servers, use the management module Web interface. Turning off the blade server When you turn off the blade server, it is still powered through the SBCE unit. The blade server can respond to requests from the service processor, such as a remote request to turn on the blade server. To remove all power from the blade server, you must remove it from the SBCE unit. Shut down your operating system before you turn off the blade server. See your operating-system documentation for information about shutting down the operating system. 5