When data is backed up, the database parameters are backed up too. Before data is restored, a check is run first to see if the database parameters from the data backup are compatible with the current database parameters of the target database.
The database parameters of the target database must match the database parameters saved in the data backup. At present, this only affects the following database parameters:
_UNICODE (in older database versions)
Values in the source and target databases must match.
CacheMemorySize
In the target database, the value for this parameter must be larger than in the source database.