Alternate db location

Hi all,
  I am installing 8.0.1 on FC3.  The initial installatin went well.  I am now
trying to change and use a different directory /pg_data. I have established and
exportede PGDATA and it is /pg_data.  I have mkdir /pg_data and changed the
owner to postgres and run chmod with 700 on the directory. Whenever it log in as
user postgres and run initdb I get the output of the attached file.
  Does anyone have any ideas?  AFAIK I have follwed the docs.

Thanks,

Bob Hartung