Power on the compute node - ThinkSystem SN550

Use this information for details about power on the compute node.

After you connect the compute node to power through the Lenovo Flex System chassis, the compute node can be started in any of the following ways.

Important: If an Attention label is on the front panel of the compute node above the power button, read it; then, remove the label and discard it before turning on the compute node.

You can press the power button on the front of the compute node to start the compute node. The power button works only if local power control is enabled for the compute node. Local power control is enabled and disabled through the CMM power command and the CMM web interface.
- For more information about the CMM power command, see the Flex System Chassis Management Module: Command-Line Interface Reference Guide.
- From the CMM web interface, select Compute Nodes from the Chassis Management menu. For more information, see "Flex System Chassis Management Module: User's Guide". All fields and options are described in the CMM web interface online help.
Note:
1. Wait until the power LED on the compute node flashes slowly before you press the power button. While the Lenovo XClarity Controller in the compute node is initializing and synchronizing with the Chassis Management Module, the power LED flashes rapidly, and the power button on the compute node does not respond. The time required for a compute node to initialize varies by system configuration; however, the power LED blink rate slows when the compute node is ready to be turned on.
2. While the compute node is starting, the power LED on the front of the compute node is lit and does not flash.
If a power failure occurs, the Lenovo Flex System chassis and the compute node can be configured through the CMM power command and the CMM web interface to start automatically when power is restored.
- For more information about the CMM power command, see the Flex System Chassis Management Module: Command-Line Interface Reference Guide.
- From the CMM web interface, select Compute Nodes from the Chassis Management menu. For more information, see "Flex System Chassis Management Module: User's Guide". All fields and options are described in the CMM web interface online help.
You can turn on the compute node through the CMM power command, the CMM web interface and the Lenovo XClarity Administrator application (if installed).
- For more information about the CMM power command, see the Flex System Chassis Management Module: Command-Line Interface Reference Guide.
- From the CMM web interface, select Compute Nodes from the Chassis Management menu. For more information, see "Flex System Chassis Management Module: User's Guide". All fields and options are described in the CMM web interface online help.
- For more information about the Lenovo XClarity Administrator application, see the Lenovo XClarity Administrator information page.
You can turn on the compute node through the Wake on LAN (WOL) feature when an optional I/O adapter with WOL capability is installed. The compute node must be connected to power (the power LED is flashing slowly) and must be communicating with the Chassis Management Module. The operating system must support the Wake on LAN feature, and the Wake on LAN feature must be enabled through the Chassis Management Module interface.