MAP 3231

Use this MAP to resolve the following problem: Required cache data cannot be located for one or more disks (SRN nnnn-9050) for PCIe2 or PCIe3 controllers.

Step 3231-1

Step 3231-2

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 that are affected. The Device Errors Logged field indicates the number of disks for which detailed information is provided. Under the Original Device heading, the Resource, Vendor/Product ID, S/N, and World Wide ID fields are provided for up to three disks. Additionally, the Original Controller Type, S/N, and World Wide ID fields for each of these disks indicate the adapter to which the disk was last attached when it was operational. See SAS resource locations to understand how to locate a disk using the Resource field.

3. Go to Step 3231-3.

Step 3231-3

Step 3231-4

Is the data on the disks needed for this or any other system?

No

Go to Step 3231-6

Yes

Go to Step 3231-5

Step 3231-5

The adapter and disks, identified previously, 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, you can move the adapter or disks, or both 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 3231-6

Option 1

Reclaim controller cache storage by performing the following steps:

Attention: All data on the disk array will be lost.

1. Start the IBM® SAS Disk Array Manager.
   1. Start AIX diagnostics and select Task Selection on the Function Selection display.
   2. Select RAID Array Manager > IBM SAS Disk Array Manager.
2. Select Diagnostics and Recovery Options > Reclaim Controller Cache Storage. > IBM SAS RAID Controller.
3. Confirm that you will allow unknown data loss.
4. Confirm that you want 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.

Option 2

If the disks are members of a disk array, delete the disk array by doing the following steps:

Attention: All data on the disk array will be lost.

1. Start the IBM SAS Disk Array Manager as follows:
   1. Start AIX diagnostics and select Task Selection on the Function Selection display.
   2. Select RAID Array Manager > IBM SAS Disk Array Manager.
2. Select Delete a SAS Disk Array > IBM SAS RAID Controller.
3. Select the disk array to delete.

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.

Option 3

Format the disks, as follows:

Attention: All data on the disk array will be lost.

1. Start the IBM SAS Disk Array Manager as follows:
   1. Start AIX diagnostics and select Task Selection on the Function Selection display.
   2. Select RAID Array Manager > IBM SAS Disk Array Manager.
2. Select Diagnostics and Recovery Options > Format Physical Disk Media (pdisk).

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.