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# Restore a performance database

Restoring a performance database results in the contents of the current performance database being overwritten.

## Prerequisites

There must be an existing performance database file.

Restoring a performance database results in the contents of the current performance database being overwritten. Ensure that you make a backup of the current database (see Back up a performance database), if appropriate to do so.

Do not attempt to restore a performance database while another restore operation is in progress.

## About this task

You can restore the performance database of a storage system regardless of whether it is registered.

## Steps

1. In the Settings dialog box, select Unisphere Databases > Performance Databases.
2. Select a storage system.
3. Click Restore.
4. Select a backup file.
5. Do one or more of the following:
   - Select Restore diagnostic data if available if you want to restore Diagnostic data.
   - Select Restore Real Time traces if available if you want to restore real -time traces.
6. Click OK.