sqlplus’tan ;
conn / as sysdba

1-shutdown immediate;
2-startup mount;
3-alter database archivelog;
4-ALTER SYSTEM SET DB_RECOVERY_FILE_DEST =’d:/orcl_database_backup’ scope=both;

SELECT * FROM V$RECOVERY_FILE_DEST;

rman target/ ‘ den;

5-backup datafile 5; yada
backup database; yada
backup database plus archivelog;

sqlplus’tan ;
6-alter database open;