MABIP52

This procedure will isolate a failing PCI adapter from a reference code when an IPL is not successful on the system or logical partition.

1. Determine the PCI bridge set (multi-adapter bridge domain) by performing the following:
   1. Record the bus number (BBBB), the multi-adapter bridge number (C) and the multi-adapter bridge function number (c) from the Direct Select Address (DSA) in word 7 of the reference code. See DSA translation for help in determining these values.
   2. Use the bus number that you recorded and the System Configuration Listing (or ask the customer) to determine what frame the bus is in.
   3. Record the frame type where the bus is located.
   4. Use the System Configuration Listing, the card position table for the frame type that you recorded, the bus number, and the multi-adapter bridge number to determine the PCI bridge set where the failure occurred. The PCI bridge set is the group of card positions controlled by the same multi-adapter bridge on the bus that you recorded.
   5. Use the card position table to record the PCI bridge set card positions.
   6. Examine the PCI bridge set in the frame, and record all the positions with IOA cards installed in them.
2. Perform the following:
   1. Power off the partition.
   2. Remove all the IOA cards in the PCI bridge set identified in step 1. Be sure to record the card position of each IOA so that you can reinstall it in the same position later. To determine the location of all the IOA cards in the PCI bridge set, go to System FRU locations .
   3. Power on the partition.

      Does the reference code or failure that sent you to this procedure occur?

      No:

      Continue with the next step.

      Yes:

      The problem is the multi-adapter bridge. Continue with step MABIP52.

3. Reinstall one of the IOAs and power on the partition. Does the reference code or failure that sent you to this procedure occur?

   Yes:

   The IOA that you just installed is the failing FRU. Replace the IOA.This ends the procedure.

   No:

   • If a different SRC occurs, return to Start of Call and follow the service procedures for the new reference code. This ends the procedure.
   • If no SRC occurs and there are more IOAs to install, power off the partition and repeat this step.
   • If no SRC occurs and there are no more IOAs to install, the problem is intermittent; contact your next level of support. This ends the procedure.

4. Power off the partition. Determine which FRU contains the multi-adapter bridge. Locate the card position table for the frame type that you recorded. Perform the following:
   1. Using the multi-adapter bridge number that you recorded, search for the multi-adapter bridge function number "F" in the card position table to determine the card position of the multi-adapter bridge's FRU.
   2. Exchange the multi-adapter bridge's FRU at the card position that you determined for it. See System FRU locations to determine the correct card location for removal.
   3. Install all IOAs in their original positions.
   4. Power on the partition.

   Does the reference code or failure that sent you to this procedure occur?

   No:

   Go to Verify a repair . This ends the procedure.

   Yes:

   Call your next level of support. This ends the procedure.