Configuring the default backup destination and archivelog mode

The DB_RECOVERY_FILE_DEST parameter specifies the default location for the fast recovery area.

Here are the steps to enable archivelog mode  and backup to the default location.

SQL> conn sys/orcl@to_primary as sysdba
Connected.
SQL> show parameter db_recovery_file_dest;
 NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
db_recovery_file_dest              string      D:\app\Admin\virtual\fast_reco
                                                 very_area\orcl
db_recovery_file_dest_size          big integer 9546M
  
--- Shutdown the database and make it at mount state to enable archivelog mode
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup mount;  -- oracle reads the control files
ORACLE instance started.
 Total System Global Area 2499805184 bytes
Fixed Size                  8749920 bytes
Variable Size             687869088 bytes
Database Buffers         1795162112 bytes
Redo Buffers                8024064 bytes
Database mounted.

 ----Enable Archivelog mode---
SQL> alter database archivelog;
 Database altered.
SQL> alter database open;
 Database altered.

  ------Check the archive mode status --
SQL> archive log list;
Database log mode              Archive Mode
Automatic archival             Enabled
Archive destination            USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence     6
Next log sequence to archive   8
Current log sequence           8

  --- Connect to RMAN client to backup the database to the default destination
 SQL> $ rman target "'/ as sysbackup '"
 Recovery Manager: Release 12.2.0.1.0 - Production on Mon Feb 7 22:33:47 2022
 Copyright (c) 1982, 2017, Oracle and/or its affiliates.  All rights reserved.
 connected to target database: ORCL (DBID=1623755738)

  ----Backup the database using 'backup database' command
RMAN> backup database;
 Starting backup at 07-FEB-22
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=145 device type=DISK
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00001 name=D:\APP\ADMIN\VIRTUAL\ORADATA\ORCL\SYSTEM01.DBF
input datafile file number=00005 name=D:\APP\ADMIN\VIRTUAL\ORADATA\ORCL\UNDOTBS01.DBF
input datafile file number=00003 name=D:\APP\ADMIN\VIRTUAL\ORADATA\ORCL\SYSAUX01.DBF
input datafile file number=00007 name=D:\APP\ADMIN\VIRTUAL\ORADATA\ORCL\USERS01.DBF
channel ORA_DISK_1: starting piece 1 at 07-FEB-22
channel ORA_DISK_1: finished piece 1 at 07-FEB-22
piece handle=D:\APP\ADMIN\VIRTUAL\FAST_RECOVERY_AREA\ORCL\PRIMARY\BACKUPSET\2022_02_07\O1_MF_NNNDF_TAG20220207T223402_K02X1CT0_.BKP tag=TAG20220207T223402 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:01:05
Finished backup at 07-FEB-22
 Starting Control File and SPFILE Autobackup at 07-FEB-22
piece handle=D:\APP\ADMIN\VIRTUAL\FAST_RECOVERY_AREA\ORCL\PRIMARY\AUTOBACKUP\2022_02_07\O1_MF_S_1096065309_K02X3G72_.BKP comment=NONE
Finished Control File and SPFILE Autobackup at 07-FEB-22
 RMAN>