Turning off a compute node

When you turn off a compute node, it is still connected to power through the Flex System chassis. A compute node can respond to requests from the IMM2, such as a remote request to turn on the compute node. To remove all power from the compute nodes, you must remove the Flex System x222 Compute Node from the Flex System chassis.

Before you turn off a compute node, shut down its operating system. See the operating-system documentation for information about shutting down the operating system.

A compute node can be turned off in any of the following ways:

• You can press the power button on a compute node (see Compute node controls, connectors, and LEDs). This starts an orderly shutdown of the operating system, if this feature is supported by the operating system.
• If the operating system stops functioning, you can press and hold the power button for more than 4 seconds to turn off a compute node.
  Attention: Pressing the power button for 4 seconds forces the operating system to shut down immediately. Data loss is possible.
• You can turn off a compute node through the CMM power command, the CMM web interface, or Flex System Manager management software (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 the "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 Flex System Manager management software, see the "Flex System Manager Software: Installation and Service Guide".