Powering on and powering off

Provides information for powering on and powering off the system.

Attention: If possible, shut down all applications and partitions before powering off the system. Using either the power-on button on the control panel or entering commands at the Hardware Management Console (HMC) to stop the system can cause unpredictable results in the data files. Also, the next time you start the system, it might take longer if all applications are not ended before stopping the system.

Install the power cords

Note:
Before powering on a system, ensure that the power cords have been plugged in to all of the power supplies.
 Primary and secondary enclosure graphic

Power on a system using an HMC

To power on a managed system, complete the following steps:

  1. In the Navigation area, expand the Systems Management icon.
  2. Expand the Servers icon.
  3. Choose the check box next to the name of the desired server. The tasks available for that server will be enabled.
  4. From the Tasks drop down menu, choose Operations -> Power on. Follow any additional on-screen instructions.

Power on a system without an HMC

To start a system that is not managed by an HMC, follow these steps: Press the power button A, as shown in the following figure, on the control panel. Observe the following after pressing the power button: The power-on light begins to blink visibly faster. The system cooling fans are activated after approximately 30 seconds and begin to accelerate to operating speed. Progress indicators, also referred to as checkpoints, appear on the control panel display while the system is being started. The power-on light on the control panel stops blinking and remains on, indicating that system power is on.

  1. On a rack-mounted system unit, open the front rack door, if necessary. On a stand-alone system unit, open the front door.
  2. Before you press the power button on the control panel, ensure that power is connected to the system unit as follows:
    Figure 42. Control Panel with labels
    Control Panel with labels
  3. Press the power button A, as shown in the figure, on the control panel.
  4. Observe the following after pressing the power button:

Power off a system using an HMC

Attention: If possible, shut down the running logical partitions on the managed system before powering off the managed system. Powering off the managed system without shutting down the logical partitions first causes the logical partitions to shut down abnormally and can cause data loss.
  1. In the Navigation area, expand the Systems Management icon.
  2. Expand the Servers icon.
  3. Choose the check box next to the name of the desired server. A selection of tasks available for that server will be displayed.
  4. From the Tasks drop down menu, choose Operations -> Power off. Follow any additional on-screen instructions.
  5. Continue with Remove the power cords

Power off a system without an HMC

  1. If there is an operating system running, proceed with step 2. Otherwise, press the power button A, as shown in Figure 42. The system power turns off. Proceed to step 4
  2. Log in to the system as a user with the authority to run the shutdown command.
  3. At the command line, enter one of the following commands: The command stops the operating system. The system power turns off.
  4. The power-on light begins to slowly blink, and the system goes into a standby state.
  5. Continue with Remove the power cords.

Remove the power cords

Table 35.
Unplug any power cables that are attached to the unit from electrical outlets. Remove all power cords from the server.
Important:
The system might be equipped with a second power supply. Before continuing with the procedure, ensure that all power sources to the system have been completely disconnected.

(L003)

or

Primary and secondary enclosure graphic