Failed Logical Drive - Drive Failure

What Caused the Problem?

One or more drives in the array have failed, causing the associated logical drives to fail. The Recovery Guru Details area provides specific information you will need as you follow the recovery steps.

Caution
Electrostatic discharge can damage sensitive components. Use a grounding wrist strap or other anti-static precautions before removing or handling components.

Important Notes

Recovery Steps

1

It may be possible to recover data from the failed logical drives. If you wish to attempt a data recovery, you must contact your technical support representative. Do not perform steps 2 - 8. Performing any recovery actions before contacting your technical support representative could jeopardize any chance of recovering data. If you prefer to recover from an existing backup or you have mistakenly removed the wrong drive while performing a degraded logical drive recovery procedure, go to step 2.

2

If you have mistakenly removed the wrong drive while performing a degraded logical drive recovery procedure, you can return the logical drive back to the degraded state by replacing the drive you removed. After the logical drives return to the degraded state, select Recheck and perform the recovery procedure listed for a degraded logical drive. You are finished with this procedure.

3

There are several different types of logical drives that can exist in an array. Use the Recovery Guru details area to determine the affected array. Then, find the array in the Logical View of the Subsystem Management Window. Use the information provided by the AMW to determine the types of logical drives on the affected array. Step through every entry in the following table and perform all procedures associated with the logical drive type combination for the affected array.

If...

Then...

One or more FlashCopy logical drives exist on the affected array

The information on the FlashCopy(s) is no longer valid and cannot be retrieved. Delete all FlashCopy logical drives associated with the affected array. You will be able to create any needed FlashCopys after this procedure has been completed.

One or more FlashCopy repository logical drives associated with FlashCopys on other arrays exist on the affected array

The information on the FlashCopy(s) is no longer valid and cannot be retrieved. Delete all FlashCopy logical drives associated with the FlashCopy repositories on the affected array. You will be able to create any needed FlashCopys after this procedure has been completed.

The mirror repository logical drives exist on the affected array

All mirror relationships associated with primary mirror logical drives on this storage subsystem are invalid.

Save the Storage Subsystem Profile before removing mirror relationships. The profile will give you a roadmap of any mirror relationships you may want to recreate after re-activating RM. You can do this by using the View>>Storage Subsystem Profile>>Save As feature in the Storage Subsystem Management window.

Perform a remove mirror relationship for all primary mirror logical drives

Deactivate the RM feature

Activate the RM feature

One or more primary logical drive mirrors exist on the affected array

You have two options to recover from this failure.

1. Remove the mirror relationship and re-establish it after the array is brought back to optimal

OR

2. If role reversal is possible, bring the array back to optimal, change the role of the primary logical drive to secondary, and return it back to primary once the synchronization has completed .

If...

Then...

You wish to use option 1.

Remove the mirror relationship and go to Step 4

You wish to use option 2.

Go to Step 4

One or more secondary logical drive mirrors exist on the affected array

The mirror relationship will returned to an optimal state once the array is brought back to optimal and the mirror has re-synchronized.

Go to Step 4.

Only standard logical drives exist on the affected array

Go to Step 4.

4

Remove all failed drives associated with this array (the fault indicator lights on the failed drives should be lit). To determine the associated drives, select one of the affected logical drives that are listed in the Recovery Guru Details area in the Subsystem Management Window. Each associated drive will have an association dot underneath it.

5

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

Note: Wait until the replaced drives are ready (fault indicator light off) before going to step 6.

6

If...

Then...

One or more primary logical drive mirrors exist on the affected array

Change the role of all primary logical drives to a secondary role. Wait until the synchronization is completed on all logical drives before continuing. See comment above

7

If...

Then...

A primary or secondary logical drive mirror relationship exists on the affected array

Save this procedure by selecting Save As because once you perform step 8 and the failure is fixed, you will not be able to access the information in step 9 from the Recovery Guru.

Go to Step 8.

No primary or secondary logical drive mirror relationships exist on the affected array.

Select the array in the Logical View of the Subsystem Management Window; then, select Array>>Initialize. Result: The logical drives in the array are initialized, one at a time. When initialization starts on a logical drive, the icon changes to Operation in Progress . When initialization is completed, all logical drives in the array are Optimal .

Note: To monitor initialization progress, select the 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.

Save this procedure by selecting Save As because once you perform step 8 and the failure is fixed, you will not be able to access the information in step 9 from the Recovery Guru.

Go to Step 8.

8

Select Recheck to rerun the Recovery Guru to ensure that the failure has been fixed.

9

If...

Then...

You deleted one or more FlashCopy logical drives or FlashCopy repositories in Step 3

If desired, create new FlashCopys to replace those deleted.

All mirror repositores were deleted because of failed mirror repository logical drives on the affected array

Activate the RM feature

If desired, create new mirror relationships to replace those deleted

You may want to save the Storage Subsystem Profile before removing mirror relationships. Refer to item 3 in Step 3 for steps used to save the Storage Subsystem Profile.

One or more primary logical drive mirrors were changed to a secondary role in Step 6

Change the role of these logical drives back to a primary role. Wait until the synchronization is completed on all logical drives before continuing.

One or more logical drives were initialized in Step 7.

Add the initialized logical drives in the affected array back to the operating system. You may need to reboot the system to see the logical drives.

Note: Do not start I/O to these logical drives until after you restore from backup.

Restore the data for the initialized logical drives from backup.