Degraded Logical Drive

What Caused the Problem?

One or more drives have failed in an array and the logical drives associated with this array have become degraded . The data on the logical drives is still accessible. However, data may be lost if another drive in the same array fails. The Recovery Guru Details area provides specific information you will need as you follow the recovery steps.

 Caution: Possible loss of data accessibility. Do not remove a component when either (1) the Service action (removal) allowed (SAA) field in the Details area of this recovery procedure is NO (), or (2) the SAA LED on the affected component is OFF (note that some products do not have SAA LEDs). Removing a component while its SAA LED is OFF may result in temporary loss of access to your data. Refer to the following Important Notes for more detail.

 Caution: Electrostatic discharge can damage sensitive components. Always use proper antistatic protection when handling components. Touching components without using a proper ground may damage the equipment.

Important Notes

Recovery Steps

1 Check the Details area to identify the failed drive(s).

2

Remove all failed drives associated with this array (the fault indicator lights on the failed drives should be on). To make a visual association of the failed drives, select one of the degraded logical drives in the Logical View of the Subsystem Management Window, which is listed in the Recovery Guru Details area. Each failed drive associated with the array will have an association dot underneath it.

3

Wait 30 seconds, then insert the new drive(s). The fault indicator light on the new drive(s) may become lit for a short time (one minute or less).

Result: Data reconstruction should begin on the new drive(s). Their fault indicator lights will go off and the activity indicator lights of the drives in the array will start flashing. When the reconstruction starts, the array's logical drive icons in the Logical View of the Subsystem Management Window change to Operation in Progress , then to Optimal , as the logical drives are reconstructed.

Notes:

  • If you are replacing a drive in a storage subsystem that contains hot spares, drive reconstruction will start on the hot spare before you insert the new drive. The data on the replacement drive may not be reconstructed until after it has completed the process on the hot spare.
  • If reconstruction does not start within a few minutes, select the new drive; then, select Advanced >> Recovery >> Reconstruct Drive to start reconstruction on the drive.
  • To monitor reconstruction progress on the affected logical drives or to change the reconstruction rate, select the reconstructing logical drive; then, select Logical Drive >> Properties. Note that once the operation in progress has completed, the progress bar is no longer displayed in the properties dialog.
  • Replace only one drive at a time for each array . Each drive should complete reconstruction before the next drive begins reconstruction.
  • Wait until the reconstruction is completed for all logical drives before continuing.

4

Click Recheck to rerun the Recovery Guru. Once ALL failed drives are replaced, then this failure should no longer appear in the Summary area. If the failure appears again after all failed drives have been replaced, contact your technical support representative.