MABIP51

Use this procedure to resolve a problem with a multi-adapter bridge.

This procedure will determine if the multi-adapter bridge is failing when the symbolic FRU PIOCARD is in the failing item list. It will also determine if the symbolic FRU PIOCARD can be removed from the FRU list.
  1. Is the failing item located in an 8203-E4A, 9407-M15, 9408-M25, 8204–E8A, 9409-M50, 8234-EMA, 9117-MMA, 9406-MMA, 9125-F2A,.or a 5796 expansion unit?
    No:
    Continue with the next step.
    Yes:
    Continue with the next failing item in the failing item list. This ends the procedure.
  2. Is the failing item located in a 5797 or 5798 expansion unit and is the location code of the other failing items in the failing item list Un-P1-C4 through Un-P1-C10, or Un-P2-C4 through Un-P2-C10?
    No:
    Continue with the next step.
    Yes:
    Continue with the next failing item in the failing item list. This ends the procedure.
  3. Is the partition an AIX® partition or a Linux® partition, or is an HMC attached?
    No:
    Continue with the next step.
    Yes:
    Go to PCI bus isolation using AIX, Linux, or the HMC to isolate a PCI bus problem from AIX, Linux, or the HMC.
Use the Service Action Log (SAL) to check for other errors under the same multi-adapter bridge using the following steps:
  1. Were you able to obtain a location for the PIOCARD FRU from the SAL?
    No:
    Find the reference code in the SAL and record the Direct Select Address (DSA), which is in word 7. See DSA translation, then continue with the next step.
    Yes:
    Go to step 6.
  2. Record the bus number (BBBB) and the multi-adapter bridge number (C) of the DSA.
  3. Go to isolation procedure MABIP53 and determine the location of the PCI I/O card in the failing item list. Then return here and continue with the next step.
  4. Determine which of the card positions are controlled by the same multi-adapter bridge that is controlling the PCI I/O card. (Use the card position table for the frame or I/O tower type you recorded in MABIP53.)
    Note: A card position is controlled by the same multi-adapter bridge if it has the same bus number and multi-adapter bridge number as the PCI I/O Card that you previously located.
  5. Record the card position and the DSA from the card position table for each card position that is controlled by the same multi-adapter bridge.
  6. Look in the SAL. See Using the Service Action Log for other failures in the same frame that are either located in the card positions that you recorded in step 4 or are listed with the PIOCARD FRU.
  7. Are any such failures listed in the SAL?
    No:
    Use the failing item list that you were using when you started this procedure. This ends the procedure.
    Yes:
    The multi-adapter bridge is failing. Remove symbolic FRU PIOCARD from the list of failing items, as it is not the failing FRU. This ends the procedure.