IOPIP30

Use this procedure to correct the problem when the system cannot find the required cache data for the attached disk units.

You were sent to this procedure from URC 9050.

  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. Did you just exchange the storage input/output (I/O) adapter as a result of a failure?
  3. Are you working with a 571F/575B card set?
  4. Remove the 571F/575B card set. Create a new card set with the following:
    Note:
    Label all parts (both original and new) before moving them.
    See Separating the 571F/575B card set and moving the cache directory card.
  5. Remove the I/O adapter. Install the new replacement storage I/O adapter with the following parts installed on it:
    Note:
    Label all parts (both old and new) before moving them.
    See Locating FRUs for information on removing and replacing parts..
  6. Did the 9050 SRC that sent you to this procedure occur on a type-D IPL?
  7. Has a new 9010 or 9050 SRC occurred in the Service Action Log or Product Activity Log?
  8. Was the new SRC 9050?
  9. The new SRC was 9010. Reclaim the cache storage. See Reclaiming IOP cache storage.
    Note:
    When an auxiliary cache I/O adapter that is connected to the storage I/O adapter logs a 9055 SRC in the Product Activity Log, the reclaim does not result in lost sectors. Otherwise, the reclaim does result in lost sectors, and the system operator might want to restore data from the most recent saved tape after you complete the repair.
  10. Are you working with a 571F/575B card set?
  11. Remove the 571F/575B card set. Create a new card set with the following: See Separating the 571F/575B card set and moving the cache directory card.
  12. Remove the I/O adapter. Install the new replacement storage I/O adapter that has the following parts installed on it: See Locating FRUs. This ends the procedure
  13. Identify the affected disk units using information in the Product Activity Log. Access SST/DST by doing one of the following:
  14. Did you perform a D IPL to get to DST?
  15. A formatted display of hexadecimal information for Product Activity Log entries is not available. To interpret the hexadecimal information, see More information from hexadecimal reports. The Device Errors detected field indicates the total number of disk units that are affected. The Device Errors logged field indicates the number of disk units for which detailed information is provided. Under the Device heading, the unit address, type, and serial number are provided for up to three disk units. Additionally, the controller type and serial number for each of these disk units indicates the adapter to which the disk was last attached when it was operational.
    Note:
    You might find an entry for an xxxx902F SRC entry in the Product Activity Log when the array includes more than 10 disk units. To interpret the hexadecimal information for these additional disk units, see More information from hexadecimal reports.
  16. Has the I/O card or have the devices been repaired or reconfigured recently?
  17. You can use one of the following repair options to correct the problem:
  18. Perform the following:
    1. Restore the adapter and disk units back to their original configuration. For more information, see Locating FRUs. After the system writes cache data to the disk units and you power off the system normally, you can move the adapter and disk units to another location.
    2. Power on the system. For more information, see Powering on and powering off. Does the IP complete successfully?
      • No: Perform problem analysis to correct the new problem. This ends the procedure.
      • Yes: This ends the procedure.
  19. You have chosen to initialize and format the identified disk units. Perform the following steps:
    Attention: Performing the following steps causes a loss of customer data.
    1. If you are not already using dedicated service tools, perform an IPL to DST. For more information, see Performing an IPL to DST. If you cannot perform a type A or B IPL, perform a type D IPL from removable media.
    2. Select Work with disk units. Did you get to DST with a Type D IPL?
      • Yes: Continue with the next step.
      • No: Select Work with disk unit recovery > Disk unit problem recovery procedures, then continue with the next step.
  20. Select Initialize and format disk unit.
  21. Follow the online instructions to format and initialize the disk units.
  22. Perform an IPL from disk. Does the IPL complete successfully?