4. Determine if the failing disk drive is parity protected:
Check the status of the failing disk drive for one of the following items:
Note: An ASP with a status of unprotected might contain disk drives that are device parity
protected.
DPY/Active
DPY/Failed
DPY/HDW Failure
DPY/Degraded
DPY/Power Loss
DPY/Not Ready
DPY/Unknown
If the status of the failing disk drive and all other disk drives in the array is shown in the preceding
list, the failing disk drive is parity protected.
Is the failing disk drive parity protected?
Yes: Go to step 9.
No: Continue with the next step.
5. Perform a backup of the data in the failing ASP.
Note: This is a customer task. Refer to the system's operations information for instructions.
Go to step 9.
6. Does the disk drive you are replacing have a status of suspended?
Yes: Go to step 9.
No: Check the status of the disk drive that is mirrored to the disk drive you are replacing. If it is
Suspended, go to step 8. If it is Active, continue with the next step.
7. Suspend the disk drive that you are replacing by performing the following steps:
a. Press F3 from the Display Disk Configuration display to return to the Work with Disk Units
display.
b. Select Work with Disk Unit Recovery from the Work with Disk Units display and press Enter.
c. Select Suspend mirrored protection from the Work with Disk Unit Recovery display and press
Enter.
d. Select the option to suspend the disk drive that you are replacing from the Suspend Mirrored
Protection display and press Enter.
e. Go to step 9.
8. The suspended mirrored pair of the failing drive has also failed and must be replaced.
Note: Performing a backup is a customer task. Refer to the system's operations information for
instructions.
Perform a backup of the data in the failing ASP.
Go to step 9 to replace the failing mirrored disk.
Return to the beginning of this procedure to replace the disk that you originally intended to replace.
9. Select Device Concurrent Maintenance from the Hardware Service Manager display. Press Enter.
The Device Concurrent Maintenance display is displayed.
a. Enter the location code of the disk drive being replaced in the form of: U787A.001.AAAXXXX-P3-
D4
b. Select option 1 (Remove device) for the Action to be performed.
c. Set the time delay for one minute: 01.
Important: Do not press Enter at this time.
Common service procedures 85
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