Create control file

CREATE CONTROLFILE REUSE DATABASE "mydb" 
NORESETLOGS NOARCHIVELOG
MAXLOGFILES 32 MAXLOGMEMBERS 3
MAXDATAFILES 200 MAXINSTANCES 1
MAXLOGHISTORY 1000
LOGFILE
GROUP 1 ('/ora01/oracle/mydb/mydb_redo1a.rdo',
              '/ora02/oracle/mydb/mydb_redo1b.rdo') SIZE 500K,
GROUP 2 ('/ora01/oracle/mydb/mydb_redo2a.rdo',
              '/ora01/oracle/mydb/mydb_redo2b.rdo') SIZE 500K
DATAFILE
'/ora01/oracle/mydb/mydb_system_01.dbf ',
'/ora01/oracle/mydb/mydb_users_01.dbf ',
'/ora01/oracle/mydb/mydb_undo_01.dbf ',
'/ora01/oracle/mydb/mydb_sysaux_01.dbf ',
'/ora01/oracle/mydb/mydb_alldata_01.dbf ';