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MAP 3132

Use this MAP to resolve the following problem: Cache data exists for one or more missing or failed disks (SRN nnnn - 9051)

The possible causes are:
  • One or more disks have failed on the adapter.
  • One or more disks were either moved concurrently or were removed after an abnormal power off.
  • The adapter was moved from a different system or a different location on this system after an abnormal power off.
  • The cache of the adapter was not cleared before it was shipped to the customer.

Step 3132-1

Identify the affected disks by examining the hardware error log. The hardware error log can be viewed as follows:

  1. Follow the steps in Examining the hardware error log and return here.
  2. Select the hardware error log to view. Viewing the hardware error log, the Device Errors Detected field indicates the total number of disks which are affected. The Device Errors Logged field indicates the number of disks for which detailed information is provided. Under the Original Device heading, the Vendor/Product ID, S/N, and World Wide ID are provided for up to three disks. Additionally, the Original Controller Type, S/N, and World Wide ID for each of these disks indicates the adapter to which the disk was last attached when it was operational.
  3. Go to Step 3132-2.

Step 3132-2

Are there other disk or adapter errors that have occurred at approximately the same time as this error?

No
Go to Step 3132-3.
Yes
Go to Step 3132-6.

Step 3132-3

Is the data on the disks (and thus the cache data for the disks) needed for this or any other system?

No
Go to Step 3132-7.
Yes
Go to Step 3132-4.

Step 3132-4

Have the adapter card or disks been physically moved recently?

No
Contact your hardware service provider.
Yes
Go to Step 3132-5.

Step 3132-5

The adapter and disks must be reunited so that the cache data can be written to the disks.

Restore the adapter and disks back to their original configuration.

After the cache data is written to the disks and the system is powered off normally, the adapter or disks can be moved to another location.

When the problem is resolved, see the removal and replacement procedures topic for the system unit on which you are working and do the "Verifying the repair" procedure.

Step 3132-6

Take action on the other errors that have occurred at the same time as this error.

When the problem is resolved, see the removal and replacement procedures topic for the system unit on which you are working and do the "Verifying the repair" procedure.

Step 3132-7

Reclaim the Controller Cache Storage by performing the following:

Attention: Data will be lost.
  1. Start the IBM® SAS Disk Array Manager.
    1. Start AIX Diagnostics and select Task Selection on the Function Selection screen.
    2. Select RAID Array Manager.
    3. Select IBM SAS Disk Array Manager.
  2. Select Diagnostics and Recovery Options.
  3. Select Reclaim Controller Cache Storage.
  4. Select the IBM SAS RAID Controller.
  5. Confirm that you will Allow Unknown Data Loss.
  6. Confirm that you wish to proceed.

When the problem is resolved, see the removal and replacement procedures topic for the system unit on which you are working and do the "Verifying the repair" procedure.

Parent topic: Controller maintenance analysis procedures