Setup /r, will not create the .DIR, .PUB, and PRIV.EDB files. Normally these files are created from the organization and site name given during setup. Setup /r simply copies the DIR.EDB exactly the way it is from the Exchange Server CD-ROM. You will not be able to start the directory service with this default DIR.EDB after running setup /r.
If you plan to restore only the information store and not the directory store, do not run setup /r: it requires you to restore all of the database files (.DIR, .PUB, and PRIV.EDB).
If you plan to restore only the information store and not the directory store, do not run setup /r: it requires you to restore all of the database files (.DIR, .PUB, and PRIV.EDB).