LICIP13

A disk unit seems to have stopped communicating with the system.

The system has stopped normal operation until the cause of the disk unit failure is found and corrected. Ensure you have read the Danger notices in Licensed internal code isolation procedures before continuing with this procedure.

If the disk unit that stopped communicating with the system has mirrored protection active, normal operation of the system stops for one to two minutes. Then the system suspends mirrored protection for that disk unit and continues normal operation.
Note: Do not power off the system or partition using the white button, function 08, ASMI, or HMC immediate power-off when performing this procedure. If this procedure or other isolation procedures referenced by this procedure direct you to IPL or power off the system,
  • perform a partition main storage dump (see Performing dumps ), or
  • if additional dump information is not needed, perform a function 03 IPL or restart the system or partition using the HMC.
  1. If the system has logical partitions, perform this procedure from the logical partition that reported the problem. To determine if the system has logical partitions, go to Determining if the system has logical partitions before continuing with this procedure.
  2. Was a problem summary form completed for this problem?
    • No: Continue with the next step.
    • Yes: Use the problem summary form information and go to step 4.
  3. Fill out a Problem Reporting Form ... completely with the instructions provided.
  4. Recovery from a device command time-out may have caused the communications loss condition (indicated by an SRC on the control panel or in the HMC). This communications loss condition has the following symptoms:
    • The A6xx SRC does not increment within two minutes.
    • The system continues to run normally after it recovers from the communications loss condition and the reference code is cleared from the control panel.

    Does the communication loss condition have the above symptoms?

    • Yes: Continue with the next step.
    • No: Go to step 6.
  5. Verify that all Licensed Internal Code PTFs have been applied to the system. Apply any Licensed Internal Code PTFs that have not been applied to the system. Does the intermittent condition continue?
    • Yes: Print all product activity logs. Print the LIC logs with a major code of 1000. Provide this information to your next level of support. This ends the procedure.
    • No: This ends the procedure.
  6. Is the storage hosted by another partition?
    • Yes: Contact your next level of support.
    • No: Continue with the next step.
  7. A manual reset of the IOP may clear the attention reference code. Perform the following:

    If you are working from the control panel:

    1. Select Manual mode on the control panel.
    2. Select Function 25 and press Enter.
    3. Select Function 26 and press Enter.
    4. Select Function 67 and press Enter to reset the IOP.
    5. Wait 10 minutes.
    6. Select Function 25 and press Enter to disable the service functions on the control panel.

    If you are working from the HMC:

    1. These need to be updated for the new HMC UI....
    2. In the Navigation Area, open the Service Applications folder.
    3. Select Service Focal Point.
    4. In the contents area, select Service Utilities.
    5. In the Service Utilities window, select the system you are working on.
    6. Select Selected > Operator Panel Service Functions.
    7. Select the logical partition, and then select Partition Functions.
    8. Select Disk Unit IOP Reset/Reload (67).
    9. Wait 10 minutes.

    Did the reset successfully clear the control panel SRC or HMC panel value and can commands be entered on the partition console?

    • No: Continue with the next step.
    • Yes: Look for a Service Action Log (SAL) entry since the last IPL, and use it to fix the problem (see Searching the service action log ). If a B6xx 5090 SRC occurred since the last IPL, look for other SRC entries and take action on them first. This ends the procedure.
  8. Is the SRC the same reference code that sent you here?
    • Yes: The same reference code occurred. Continue with the next step.
    • No: Collect all words of the reference code and perform, problem analysis to resolve the new problem. This ends the procedure.
  9. Powering off and powering on the affected IOP domain may clear the attention reference code. Perform the following:

    If you are working from the control panel:

    1. Select Manual mode on the control panel.
    2. Select Function 25 and press Enter.
    3. Select Function 26 and press Enter.
    4. Select Function 68 and press Enter to power off the domain.
    5. After the domain has been powered off or 10 minutes have passed, select Function 69 and press Enter to power on the domain.
    6. Wait 10 minutes.
    7. Select Function 25 and press Enter to disable the service functions on the control panel.

    If you are working from the HMC:

    1. In the Navigation Area, open the Service Applications folder.
    2. Select Service Focal Point.
    3. In the contents area, select Service Utilities.
    4. In the Service Utilities window, select the system you are working on.
    5. Select Selected > Operator Panel Service Functions.
    6. Select the logical partition, and then select Partition Functions.
    7. Select Power off domain (68).
    8. After the domain has been powered off or 10 minutes have passed, select Power on domain (69).
    9. Wait 10 minutes.

    Did this successfully clear the control panel SRC or HMC panel value, and can commands be entered on the partition console?

    • No: Continue with the next step.
    • Yes: Look for a SAL entry since the last IPL, and use it to fix the problem (see Searching the service action log ). If a B6xx 5090 SRC occurred since the last IPL, look for other SRC entries and take action on them first. This ends the procedure.
  10. Is the SRC the same reference code that sent you here?
    • Yes: The same reference code occurred. Continue with the next step.
    • No: Collect all words of the reference code and perform problem analysis to resolve the new problem. This ends the procedure.
  11. Perform a main storage dump, then perform an IPL by performing the following:

    If you are working from the control panel:

    1. Select Manual mode on the control panel.
    2. Select Function 22 and press Enter to dump the main storage to the load-source disk unit.
    3. Wait for SRC A100 300x to occur, indicating that the dump is complete.
    4. Then perform an IPL to DST (see Performing an IPL to dedicated service tools ).

    If you are working from the HMC:

    1. In the Navigation Area, open Server and Partition.
    2. Select Server Management.
    3. In the contents area, open the server on which the logical partition is located.
    4. Select Partitions.
    5. Right-click the logical partition profile and select Restart Partition.
    6. In the Restart Partition window, select the Dump restart option.

      Does a different SRC occur, or does a display appear on the console showing reference codes?

      • No: Continue with the next step.
      • Yes: Perform problem analysis to correct the new problem. This ends the procedure.
  12. Does the same reference code occur?
    • Yes: Continue with the next step.
    • No: The problem is intermittent. Perform the following:
      1. Print the system product activity log for the magnetic storage subsystem and print the LIC logs with a major code of 1000.
      2. Copy the main storage dump to removable media (see Managing dumps ).
      3. Contact your next level of support and provide them with this information. This ends the procedure.
  13. Are characters 7-8 of the top 16 character line of function 12 (2 rightmost characters of word 2) equal to 13 or 17?
    • Yes: Continue with the next step.
    • No: Go to step 16.
  14. Use the word 1 through 9 information recorded on the Problem summary form to determine the disk unit that stopped communicating with the system:
    • Characters 9-16 of the top 16 character line of function 12 (word 3) contain the IOP direct select address.
    • Characters 1-8 of the bottom 16 character line of function 12 (word 4) contains the unit address.
    • Characters 1-8 of the top 16 character line of function 13 (word 6) may contain the disk unit type, level and model number.
    • Characters 13-16 of the top 16 character line of function 13 (4 rightmost characters of word 7) may contain the disk unit reference code.
    • Characters 1-8 of the bottom 16 character line of function 13 (word 8) may contain the disk unit serial number.
      Note: For 2105 and 2107 disk units, characters 4-8 of the bottom 16 character line of function 13 (5 rightmost characters of word 8) contain the disk unit serial number.
  15. Is the disk unit reference code 0000?
    • No: Using the information from step 14, find the table for the indicated disk unit type. Perform problem analysis for the disk unit reference code. This ends the procedure.
    • Yes: Perform the following steps:
      1. Determine the IOP type by using characters 9-12 of the bottom 16 character line of function 13 (4 leftmost characters of word 9).
      2. Find the unit reference code table for the IOP type. Determine the unit reference code by using characters 13-16 of the bottom 16 character line of function 13 (4 rightmost characters of word 9).
      3. Perform problem analysis for the unit reference code. This ends the procedure.
  16. Are characters 7-8 of the top 16 character line of function 12 (the two rightmost characters of word 2) equal to 27?
    • Yes: Continue with the next step.
    • No: Go to step 20.
  17. Use the word 1 through 9 information recorded on the Problem summary form to determine the disk unit that stopped communicating with the system:
    • Characters 9-16 of the top 16 character line of function 12 (word 3) contain the IOP direct select address.
    • Characters 1-8 of the bottom 16 character line of function 12 (word 4) contains the disk unit address
    • Characters 9-16 of the bottom 16 character line of function 12 (word 5) contains the disk unit type, level and model number.
    • Characters 1-8 of the bottom 16 character line of function 13 (word 8) contains the disk unit serial number.
      Note: For 2105 and 2107 Disk Units, characters 4-8 of the bottom 16 character line of function 13 (5 rightmost characters of word 8) contain the disk unit serial number.
    • Characters 13-16 of the bottom 16 character line of function 13 (4 rightmost characters of word 9) contain the disk unit reference code.
  18. Is the disk unit reference code 0000?
    • No: Continue with the next step.
    • Yes: Find the table for the indicated disk unit type. Then find unit reference code (URC) 3002 in the table, and exchange the FRUs for that URC, one at a time.
      Note: Do not perform any other isolation procedures that are associated with URC 3002.
      This ends the procedure.
  19. Are characters 9-16 of the bottom 16 character line of function 13 (word 9) B6xx 51xx?
    • Yes: Using the B6xx table, perform problem analysis for the 51xx unit reference code. This ends the procedure.
    • No: Using the information from step 17, find the table for the indicated disk unit type. Perform problem analysis for the disk unit reference code. This ends the procedure.
  20. Are the 2 rightmost characters of word 2 on the Problem summary form equal to 62?
    • No: Use the information in characters 9-16 of the bottom 16 character line of function 13 (word 9) and use this information instead of the information in word 1 for the reference code. This ends the procedure.
    • Yes: Continue with the next step.
  21. Are characters 9-16 of the top 16 character line of function 12 (word 3) equal to 00010004?
    • Yes: Continue with the next step.
    • No: Go to step 24.
  22. Are characters 13-16 of the bottom 16 character line of function 12 (4 rightmost characters of word 5) equal to 0000?
    • No: Continue with the next step.
    • Yes: Go to step 25.
  23. Note the following:
    • Characters 13-16 of the bottom 16 character line of function 12 (4 rightmost characters of word 5) contain the disk unit reference code.
    • Characters 1-8 of the top 16 character line of function 13 (word 6) contains the disk unit address.
    • Characters 9-16 of the top 16 character line of function 13 (word 7) contain the IOP direct select address.
    • Characters 1-8 of the bottom 16 character line of function 13 (word 8) contains the disk unit type, level and model number.

    Find the table for the disk unit type (characters 1-4 of the bottom 16 character line of function 13 - 4 leftmost characters of word 8), and use characters 13-16 of the bottom 16 character line of function 12 (4 rightmost characters of word 5) as the unit reference code. This ends the procedure.

  24. Are characters 9-16 of the top 16 character line of function 12 (word 3) equal to 0002000D?
    • Yes: Continue with the next step.
    • No: Use the information in characters 9-16 of the bottom 16 character line of function 13 (word 9), instead of the information in word 1 for the reference code, and perform problem analysis.
      • Characters 1-8 of the top 16 character line of function 13 (word 6) may contain the disk unit address.
      • Characters 9-16 of the top 16 character line of function 13 (word 7) may contain the IOP direct select address.
      • Characters 1-8 of the bottom 16 character line of function 13 (word 8) may contain the disk unit type, level and model number. This ends the procedure.
  25. Note the following:
    • Characters 1-8 of the top 16 character line of function 13 (word 6) contains the disk unit address.
    • Characters 9-16 of the top 16 character line of function 13 (word 7) contain the IOP direct select address.
    • Characters 1-8 of the bottom 16 character line of function 13 (word 8) contains the disk unit type, level and model number.

    Find the table for the disk unit type (characters 1-4 of the bottom 16 character line of function 13 (4 leftmost characters of word 8) and use 3002 as the unit reference code. Exchange the FRUs for URC 3002 one at a time. This ends the procedure.