installation postgresql

"Loris" <[email protected]> Sun, 23 Jan 2005 17:43:50 +0100

Newsgroups	gmane.comp.db.postgresql.cygwin
Message-ID	<[email protected]>

After the instructions: 
  1.. cd / 
  2.. bunzip2 -c /tmp/cygipc-2.03-2.tar.tar | tar xvf - 
  3.. ipc-daemon2 &
I wrote:
    
    4.  initdb -D usr/local/posgresql/data -W -E LATIN1

and....

initdb:failed
initdb: removing data directory "usr/share/postgresql/data"

Where is the error?