the hmc user interface provides a power-off function to turn off the power to the system.

    linux does not provide hot-swap procedures for adapter and device removal and installation. the system power must be turned off to service an adapter or device. individual power components and fans may be serviced with power on for power systems equipped with redundant power and cooling. before servicing this system, check removal and installation procedures.

    if the system is operating in linux, typing the shutdown now -h command causes the system to shut down and power off. the -f flag shuts down the system without warning system users. check with the system administrator before using this command. if you cannot use this method, you can power off the system by pressing the power button on the operator panel or typing the appropriate command at the hmc.

    using the power-on button on the operator panel or commands at the hmc to power off the system can cause unpredictable results in the data files.