MAP 3110

Use this MAP to resolve the following problems:

Incompatible disk installed at the degraded disk location in the disk array (SRN nnnn - 9025)
Disk array is degraded due to a missing or failed disk (SRN nnnn - 9030)
Automatic reconstruction initiated for a disk array (SRN nnnn - 9031)
Disk array is degraded due to a missing or failed disk (SRN nnnn - 9032)

Step 3110-1

Identify the disk array by examining the hardware error log.

Follow the steps in Examining the hardware error log and return here.
Select the hardware error log to view. This error log displays the following disk array information under the heading Array Information : Resource, S/N (serial number), and RAID Level.
Go to Step 3110-2.

Step 3110-2

View the current disk array configuration as follows:

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.
Select List SAS Disk Array Configuration.
Select the IBM SAS RAID Controller identified in the hardware error log.
Go to Step Step 3110-3.

Step 3110-3

Does a disk array have a state of Degraded?

No: Go to Step 3110-4.
Yes: Go to Step 3110-5.

Step 3110-4

The affected disk array should have a state of either Rebuilding or Optimal due to the use of a hot spare disk.

Identify the failed disk, which is no longer a part of the disk array, by finding the pdisk listed at the bottom of the screen that has a state of either Failed or RWProtected. Using appropriate service procedures, such as use of the SCSI and SCSI RAID Hot Plug Manager, remove the failed disk and replace it with a new disk to use as a hot spare. Refer to the Replacing pdisks section for this procedure, and then continue here.

Return to the List SAS Disk Array Configuration screen in the IBM SAS Disk Array Manager. If the new disk is not listed as a pdisk, it might first need to be prepared for use in a disk array. Do the following:

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.
Select Create an Array Candidate pdisk and Format to 528 Byte Sectors.
Select the appropriate IBM SAS RAID Controller.
Select the disks from the list that you want to prepare for use in the disk arrays.

In order to make the new disk usable as a hot spare, do the following:

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.
Select Change/Show SAS pdisk Status.
Select Create a Hot Spare.
Select the IBM SAS RAID Controller.
Select the pdisk that you want to designate as a hot spare.

Note: Hot spare disks are useful only if their capacity is greater than or equal to that of the smallest capacity disk in a disk array that becomes Degraded.

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 3110-5

Identify the failed disk by finding the pdisk listed for the degraded disk array that has a state of Failed. Using appropriate service procedures, such as the SCSI and SCSI RAID Hot Plug Manager, remove the failed disk and replace it with a new disk to use in the disk array. Refer to the Replacing pdisks section for this procedure, and then continue here.

Note: The replacement disk should have a capacity that is greater than or equal to that of the smallest capacity disk in the degraded disk array.

To bring the disk array back to a state of Optimal, do the following:

Start the IBM SAS Disk Array Manager.
1. Start Diagnostics and select Task Selection on the Function Selection screen.
2. Select RAID Array Manager.
3. Select IBM SAS Disk Array Manager.
Select Reconstruct a SAS Disk Array.
Select the failed pdisk to reconstruct.

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.