Lenovo ThinkSystem SN550, Maintenance Manual

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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 at http://flexsystem.lenovofiles.com/help/topic/
com.lenovo.acc.cmm.doc/cli_command_power.html.
– From the CMM web interface, select Compute Nodes from the Chassis Management menu. For
more information, see the "Flex System Chassis Management Module: User's Guide" at http://
flexsystem.lenovofiles.com/help/topic/com.lenovo.acc.cmm.doc/cmm_user_guide.html. All fields and
options are described in the CMM web interface online help.
Notes:
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 at http://flexsystem.lenovofiles.com/help/topic/
com.lenovo.acc.cmm.doc/cli_command_power.html.
– From the CMM web interface, select Compute Nodes from the Chassis Management menu. For
more information, see the "Flex System Chassis Management Module: User's Guide" at http://
flexsystem.lenovofiles.com/help/topic/com.lenovo.acc.cmm.doc/cmm_user_guide.html. 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 at http://flexsystem.lenovofiles.com/help/topic/
com.lenovo.acc.cmm.doc/cli_command_power.html.
– From the CMM web interface, select Compute Nodes from the Chassis Management menu. For
more information, see the "Flex System Chassis Management Module: User's Guide" at http://
flexsystem.lenovofiles.com/help/topic/com.lenovo.acc.cmm.doc/cmm_user_guide.html. All fields and
options are described in the CMM web interface online help.
– For more information about the Lenovo XClarity Administrator application, see https://support.lenovo.
com/us/en/ documents/LNVO-XCLARIT.
• 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.
Chapter 1
.
Introduction
9