The description and location code of the selected alternate restart device. (The alternate restart device is also known as the alternate IPL device.)
If this field does not describe the correct alternate restart device, then click Select to select a different alternate restart device.
If the selected alternate restart device is an I/O processor (IOP), this description is either PCI I/O Processor or I/O Processor.
If the slot is empty, this description is Empty slot.
Otherwise, the page uses the first description it finds in the following hierarchy.