shut down the partitions before powering off the processor subsystem.

    to power off the processor subsystem using the hmc, do the following:

    1. to select your preferred partition environment, click on the partition management icon under the hmc hostname. the contents area now lists the processor subsystem as available as a managed system. if you have only one processor subsystem, the contents area lists the processor subsystem as system a.

    2. select the appropriate managed system.

    3. to power off the managed system, select the desired system in the contents area. next, on the menu, choose selected.

    4. select power off.

    5. a screen displays to verify that you want to power off. select yes.

    only logic power will be removed; 350 v dc power will still be present within the system.