SQL> show parameter db_recovery_file_dest

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
db_recovery_file_dest                string      M:\
db_recovery_file_dest_size           big integer 999147483648
SQL> show parameter log_archive_format;

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
log_archive_format                   string      Arch%t_%s_%r
SQL>