If we create an index with the NOLOGGING option, what is the impact on recover in the case of a crash:

THIS IS WHAT I KNOW ABOUT IT:
With NOLOGGING on the index, when inserts are done, the data is written into the redo, but not the index. So if the database crashes, and requires the redo logs, we would get the data, but not the index. So after the recover we would have to go and rebuild the index. Is this a correct interpretation of the way Oracle handles NOLOGGING on indexes?