Checklist 14: Actions for non-load source disk unit failure

This checklist shows the sequence of steps you should use to recover after a non-load-source disk unit with mirrored protection has failed.

This checklist should be used for the following problem situation:

Failed unit:: Any
Mirrored protection:: Yes

Before you begin your recovery, make a copy of this checklist. Fill in the appropriate areas as you and the service representative perform the recovery steps. This checklist provides an important record of your recovery actions. It can help you to diagnose any problems that occur after the recovery. It might also be useful in evaluating your backup strategy.

Most steps in the checklist include references to other topics in this document. Refer to these tasks if you need more information about how to perform a particular step. You might not need to perform some steps, such as restoring changed objects, if they do not apply in your situation.

Note: For many failures, the system does not have to stopped and started again. The service representative can repair the failed component while the system continues to run.

Table 1. Recovery checklist for disk failure–Checklist 14
Task	What to do	Where to read more about it
Actions to be performed by the service representative
___ Task 1	Replace the failed disk unit.
___ Task 2	Resume mirrored protection.
Actions to be performed by the user
___ Task 3	Ensure that disk configuration is correct.	Working with mirrored protection.