If you cannot restore the disk, contact the Rational DOORS customer support team, who will talk you through a procedure to restore the database using your Rational DOORS archives. They will help you salvage as much of your data as possible.
If you are using Rational DOORS Web Access with Rational Insight or TRS consumer applications, such as IBM Rational Engineering Lifecycle Manager, restore the Derby database that is used for the integration when you restore the Rational DOORS database. The default location for the Derby database is C:\Program Files (x86)\IBM\Rational\DOORS Web Access\9.version\server\festival\derby\.