RMAN-03009: failure of backup command on ORA_DISK_1 channel at 07/09/2014 11:21:25 ORA-19602: cannot backup or copy active file in NOARCHIVELOG mode

The reason for the above error is the due to the database is configured to run in NOARCHIVE Mode.

So to fix the error, We need to convert the database to ARCHIVE Mode.

SQL> archive log list;
Database log mode              No Archive Mode
Automatic archival             Disabled
Archive destination            /u01/app/oracle/product/11.2.0/db_1/dbs/arch
Oldest online log sequence     2
Current log sequence           4
SQL>

Converting  to ARCHIVE Mode.

SQL> alter database archivelog;

alter database archivelog

*

ERROR at line 1:

ORA-01126: database must be mounted in this instance and not open in any instance

SQL>

So, doing that before the database should be in Mounted state.

Database closed.

Database dismounted.

ORACLE instance shut down.

SQL> startup mount;

ORACLE instance started.

Total System Global Area  392495104 bytes

Fixed Size                  2213696 bytes

Variable Size             138414272 bytes

Database Buffers          247463936 bytes

Redo Buffers                4403200 bytes

Database mounted.

SQL> alter database archivelog;

Database altered.

SQL> archive log list;

Database log mode              Archive Mode

Automatic archival             Enabled

Archive destination            /u01/app/oracle/product/11.2.0/db_1/dbs/arch

Oldest online log sequence     2

Next log sequence to archive   4

Current log sequence           4

SQL> alter database open;

Database altered.

SQL> 

Bingo...!!!!!!!!!!!!!