SCSI connector: This connector is used to attach external SCSI devices to the server.

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, 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, 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:

vIf a power failure occurs while the server is turned on, the server will restart automatically when power is restored.

vIf ac power is present, the server can be turned on from the Remote Supervisor Adapter user interface.

vThe Wake on LAN feature can turn on the server.

Notes:

1.The power supplies are hot-swappable and redundant only at 200-240 V ac.

2.Both power supplies must be connected to the power source for operation at 100-127 V ac.

3.During normal operation, both power supplies must be installed for proper operation.

4.While the server is powering up, the power-on LED on the front of the server is lit. When the server is connected to ac power but is not turned on, the power-on LED on the front of the server flashes.

Turning off the server

When you turn off the server and leave it connected to ac power, the server can respond to requests from the service processor, such as a remote request 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 your operating-system documentation for information about shutting down the operating system.

8IBM xSeries 450 Type 8688: Hardware Maintenance Manual and Troubleshooting Guide

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IBM 8688 manual Server power features, Turning on the server, Turning off the server