Folks,
Can you please suggest a creative way that I could force writes to a particular datafile of a tablespace?

To elaborate :
Tablespace BIGASS consists of 4 EMPTY (no data that is) 800M datafiles. say bigass01.dbf,02,03,04.dbf.

I want to simulate writes to 04.dbf without filling up 01,02,03..or taking them (1,2,3.dbf) offline.

This is a test database..and I would be willing to tamper with the dictionary tables if required! Just tell me where and what to plug..:-)

Thanks in advance.