Locating the system's load source from the system console

Use this procedure to locate the system load-source and alternate load-source input/output processors (IOPs), load-source I/O adapter, and load-source disk unit.

1. From either the System Service Tool (SST) display or the Dedicated Service Tools (DST) display, select the Start a service tool option.
2. At the Start a Service Tool display, select the Hardware service manager option.
3. At the Hardware Service Manager display, select the Logical hardware resources option.
4. At the Logical Hardware Resources display, select the System bus resources option.
5. At the Logical Hardware Resources on System Bus display, search for an I/O processor, combined function I/O processor, or multifunction I/O processor that contains an asterisk (*) in the description. This special character (*) indicates that this I/O processor is the load-source I/O processor.

   The special characters percent (%) and equals (=) might also appear in the description of logical hardware resources. These characters indicate that those resources are alternate IPL resources. To better understand the special characters that indicate load-source resources and alternate load-source resources, use the Help function key (F1).

6. Move the cursor to the load-source IOP. To determine the location of the load-source IOP:
   1. Select the Associated packaging resources option.
   2. At the Packaging Resources Associated with a Logical Resource display, select the Display detail option. Listed on the Packaging Hardware Resource Detail display is the frame ID and card position of the FRU that contains the load-source IOP.
   3. Select the Cancel function to return to the Packaging Resources Associated with a Logical Resource display.
   4. Select the Cancel function to return to the Logical Hardware Resources on System Bus display.
7. Select the Resources associated with IP option for the load-source IOP.
8. Page down until you find the disk unit with the special character * in its description. This is the load-source disk unit.
9. Move the cursor to the load-source disk unit. To determine the location of the load-source disk unit:
   1. Select the Associated packaging resources option.
   2. At the Packaging Resources Associated with a Logical Resource display, select the Display detail option. Listed on the Packaging Hardware Resource Detail display is the frame ID and card position of the FRU that contains the load-source disk unit.
   3. Select the Cancel function to return to the Packaging Resources Associated with a Logical Resource display.
   4. Select the Cancel function to return to the Logical Hardware Resources on System Bus display.
10. Search for the I/O adapter that is above and closest to the load-source disk unit on the display. This is the load-source IOA.
11. Move the cursor to the load-source IOA. To determine the location of the load-source IOA:
    1. Select the Associated packaging resources option.
    2. At the Packaging Resources Associated with a Logical Resource display, select the Display detail option. Listed on the Packaging Hardware Resource Detail display is the frame ID and card position of the FRU that contains the load-source IOA.
    3. Select the Cancel function to return to the Packaging Resources Associated with a Logical Resource display.
    4. Select the Cancel function to return to the Logical Hardware Resources on System Bus display.