Where is the oracle 11gR2 default database storage location on Linux?

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http://stackoverflow.com – Someone says the default $ORACLE_BASE=/u01/app/oracle $ORACLE_HOME=/u01/app/oracle/product/11.0.2/db_home1 and data files store at $ORACLE_BASE/oradata/$ORACLE_SID with file system storage type. But in my server, the two parameters are $ORACLE_BASE=/u01/app $ORACLE_HOME=/u01/app/oracle and file stores at /u01/app/oradata I created this SID with the tool "dbca" and default template, what's wrong with it? (HowTos)