Abnormal termination of a rebuild
If the activity LED on the replacement drive permanently ceases to be illuminated even while other drives in the array are active, the rebuild process has terminated abnormally. The following table indicates the three possible causes of abnormal termination of a rebuild.
Observation | Cause of rebuild termination |
|
|
None of the drives in the array have an | One of the drives in the array has |
illuminated amber LED. | experienced an uncorrectable read error. |
The replacement drive has an | The replacement drive has failed. |
illuminated amber LED. |
|
One of the other drives in the array has | The drive with the illuminated amber LED has |
an illuminated amber LED. | now failed. |
Each of these situations requires a different remedial action.
Case 1: An uncorrectable read error has occurred.
1.Back up as much data as possible from the logical drive.
CAUTION: Do not remove the drive that has the media error. Doing so causes the logical drive to fail.
2.Restore data from backup. Writing data to the location of the unreadable sector often eliminates the error.
3.Remove and reinsert the replacement drive. This action restarts the rebuild process.
If the rebuild process still terminates abnormally:
1.Delete and recreate the logical drive.
2.Restore data from backup.
Case 2: The replacement drive has failed.
Verify that the replacement drive is of the correct capacity and is a supported model. If these factors are not the cause of the problem, use a different drive as the replacement.
Case 3: Another drive in the array has failed.
A drive that has recently failed can sometimes be made temporarily operational again by cycling the server power.
1.Power down the server.
2.Remove the replacement physical drive (the one undergoing a rebuild), and reinstall the drive that it is replacing.
3.Power up the server.
If the newly failed drive seems to be operational again:
1.Back up any unsaved data.
2.Remove the drive that was originally to be replaced, and reinsert the replacement physical drive. The rebuild process automatically restarts.
3.When the rebuild process has finished, replace the newly failed drive.
However, if the newly failed drive has not recovered:
1.Remove the drive that was originally to be replaced, and reinsert the replacement physical drive.
2.Replace the newly failed drive.
Drive procedures 85
