Power On Normal: This mode boots an operating system from the designated boot device. Power On SMS: This mode boots using the default boot list that is stored in the managed system's firmware. Use this mode to run standalone diagnostics. Power On Diagnostic Boot List: This boot mode performs a service mode boot using the list saved on the managed system. This option is the preferred way of running online diagnostics. Power on Diagnostic Default Boot List: This mode boots to the System Management Services (SMS) menus. Power On Open Firmware Ok Prompt: This mode is used by service representatives to obtain debug information.