Problem with pg_baselinebackup

<div class="WordSection1"><p class="MsoNormal">Hi Folks,<p class="MsoNormal"> <p class="MsoNormal">I’m pretty new to
Postgres.I have an extensive Oracle and MySQL background here.<p class="MsoNormal">We are putting up test and
productionservers.<p class="MsoNormal">I’m interested in doing online backups with WAL archiving turned on so that I
cando point in time recovery.<p class="MsoNormal"> <p class="MsoNormal">My database files are stored in
/u01/postgres/dataand /u02/postgres/data/confluence_data directories.<p class="MsoNormal">My WAL files are in
/u03/postgres/data/pg_log<pclass="MsoNormal"> <p class="MsoNormal">I want to backup my database to the directory
/u03/postgres_backups/pg_basebackups/”directoryname_date_timestamp”<pclass="MsoNormal"> <p class="MsoNormal">I’m trying
acommand like this:<p class="MsoNormal">$ pg_basebackup -x
--pgdata=/u03/postgres_backups/pg_basebackups/pg_basebackup_16-Jan-2014:10:15:00--label=TEST<p class="MsoNormal"> <p
class="MsoNormal">Afterentering the password, I’m receiving the following error:<p class="MsoNormal">pg_basebackup:
directory"/u02/postgres/data/confluence_data" exists but is not empty<p class="MsoNormal"> <p class="MsoNormal">The
directorythat it is complaining about ("/u02/postgres/data/confluence_data"  is a database directory with database data
init.  Not the directory where I want the backup files to go.  I expected that the switch <p
class="MsoNormal">--pgdata=/u03/postgres_backups/pg_basebackups/pg_basebackup_16-Jan-2014:10:15:00<p
class="MsoNormal"> <pclass="MsoNormal">Would send the backup to that directory.  Can anyone enlighten me on why it
wouldcomplain about a directory where database files reside?</div>