DSKIP03

Use this procedure to determine the reference code, which is used to isolate a problem and to determine the failing device.

Note: When exchanging a disk unit, go todisk unit recovery procedures.
  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.
  2. Look in the Service action log for other errors logged at or around the same time as the 310x SRC. If no entries appear in the service action log, use the product activity log . Use the other SRCs to correct the problem before performing an IPL. Contact your next level of support as necessary for assistance with SCSI bus problem isolation. If the problem is not corrected, continue with the next step.
  3. Perform an IPL to dedicated service tool (DST). See dedicated service tools.
    Does an SRC appear on the control panel?
    • Yes: Go to step 6.
    • No: Does either the Disk Configuration Error Report, the Disk Configuration Attention Report, or the Disk Configuration Warning Report display appear?
      • Yes: Continue with the next step.
      • No: Go to step 5.
  4. Does one of the following messages appear in the list?
    • Missing disk units in the configuration
    • Missing mirror protection disk units in the configuration
    • Device parity protected units in exposed mode
      • No: Continue with the next step.
      • Yes: Select option 5, press F11, and then press Enter to display the details.

        If any of the reference codes are not 0000, go to step 6 and use the reference code that is not 0000.

        Note: Use the characters in the Type column to find the correct reference code table.
  5. Does the Display Failing System Bus display appear?
    • No: Look at all the Product activity logs by selecting Product activity log under DST (see dedicated service tools). If there is more than one SRC logged, use an SRC that is logged against the IOP or IOA.

      Is an SRC logged as a result of this IPL?

      • Yes: Continue with the next step.
      • No: You cannot continue isolating the problem. Use the original SRC and exchange the failing items, starting with the highest probable cause of failure. If the failing item list contains FI codes, see using failing item codesto help determine part numbers and location in the system. This ends the procedure.
    • Yes: Use the reference code that is displayed under Reference Code to correct the problem. This ends the procedure.
  6. Record the SRC.

    Is the SRC the same one that sent you to this procedure?

    • Yes: Continue with the next step.
    • No: Perform problem analysis to correct the problem. This ends the procedure.
  7. Perform the following:
    1. Power off the system or expansion tower.
    2. See using failing item codesto find the devices identified by FI code FI01106.
    3. Disconnect one of the disk units, (other than the load-source disk unit), the tape units, or the optical storage units that are identified by FI code FI01106. Slide it partially out of the system.
      Note: Do not disconnect the load-source disk unit, although FI code FI01106 may identify it.
  8. Power on the system or the expansion tower that you powered off.

    Does an SRC appear on the control panel?

    • No: Continue with the next step.
    • Yes: Go to step 12.
  9. Does either the Disk Configuration Error Report, the Disk Configuration Attention Report, or the Disk Configuration Warning Report display appear with one of the following listed?
    • Missing disk units in the configuration
    • Missing mirror protection disk units in the configuration
    • Device parity protected units in exposed mode
      • Yes: Continue with the next step.
      • No: Go to step 11.
  10. Select option 5, press F11, and then press Enter to display details.

    Does an SRC appear in the Reference Code column?

    • No: Continue with the next step.
    • Yes: Go to step 12.
  11. Look at all the Product activity logs by selecting Product activity log under DST.

    Is an SRC logged as a result of this IPL?

    • Yes: Continue with the next step.
    • No: The last device you disconnected is the failing item. Exchange the failing device and reconnect the devices that were disconnected previously.
      Note: Before exchanging a disk drive, you should attempt to save customer data. See the backing up and recovering instructions.

      This ends the procedure.

  12. Record the SRC.

    Is the SRC the same one that sent you to this procedure?

    • No: Continue with the next step.
    • Yes: The last device you disconnected is not the failing item.
      1. Leave the device disconnected and go to step 7 to continue isolation.
      2. If you have disconnected all devices that are identified by FI code FI01106 except the load-source disk unit, reconnect all devices. Then, go to step 15.
  13. Does the Disk Configuration Error Report, the Disk Configuration Attention Report, or the Disk Configuration Warning Report display appear with one of the following listed?
    • Missing disk units in the configuration
    • Missing mirror protection disk units in the configuration
    • Device parity protected units in exposed mode
      • Yes: Continue with the next step.
      • No: Use the reference code to correct the problem. This ends the procedure.
  14. Select option 5, press F11, and then press Enter to display details.

    Are all the reference codes 0000?

    • No: Use the reference code to correct the problem. This ends the procedure.
    • Yes: The last device you disconnected is the failing item.
      1. Reconnect all devices except the failing item.
      2. Before exchanging a disk unit, go to using location codes. This ends the procedure.
  15. Was disk unit 1 (the load-source disk unit) a failing item that FI code FI01106 identified?
    • Yes: The failing items that FI code FI01106 identified are not failing. The load-source disk unit may be failing. Use the original SRC and exchange the failing items, starting with the highest probable cause of failure. If the failing item list contains FI codes, see using failing item codes to help determine part numbers and location in the system. This ends the procedure.
    • No: The failing items that FI code FI01106 identified are not failing. Use the original SRC and exchange the failing items, starting with the highest probable cause of failure. If the failing item list contains FI codes, see using failing item codesto help determine part numbers and location in the system. This ends the procedure.