Make sure partitioning is working
In order to validate your partitioning scheme, you can use the $PARTITION system function, detailed on MSDN at http://msdn.microsoft.com/en-us/library/ms188071.aspx


  Returns the partition number into which a set of partitioning column values would be mapped for any specified partition function


So for your example, you could run:

SELECT $PARTITION.FNArchived (1);


or 

SELECT $PARTITION.FNArchived (0);


To determine which partition each value will be stored in.