How to backup controlfile in RMAN in Oracle Database

Controlfile is an important part of the Oracle database and backing up the control file is a necessary operation. Here is How to backup controlfile in RMAN

How to enable auto backup of controlfile

We can enable auto backup of the controlfile using RMAN settings. This will an auto backup of the control file after every rman backup

Enabling
rman target /
show all;
CONFIGURE CONTROLFILE AUTOBACKUP ON;
show all;

Disabling
rman target /
show all;
CONFIGURE CONTROLFILE AUTOBACKUP OFF;
show all;

How to backup controlfile to trace

Here is the statement on how to backup controlfile to trace in oracle database. This Produces SQL statements that can later be used to re-create your control file:

ALTER DATABASE BACKUP CONTROLFILE TO TRACE;

This creates the files in the Oracle Database trace directory. If you want to generate in a specific location i.e some arbitrary path

ALTER DATABASE BACKUP CONTROLFILE TO TRACE as ‘<location>’;
Example
ALTER DATABASE BACKUP CONTROLFILE TO TRACE as ‘/home/location/ccf.sql’;

How to take a manual backup of Controlfile

We can use RMAN command

rman target /
backup controlfile;

How to create a binary copy of Controlfile as SQL

sqlplus / as sysdba
alter database backup controlfile to '+FLASH';
ALTER DATABASE BACKUP CONTROLFILE TO '/home/oracle/backup/control.bkp';

How to create a binary copy of Controlfile as RMAN

rman target /
BACKUP AS COPY CURRENT CONTROLFILE FORMAT '/home/oracle/backup/control.bkp';

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https://docs.oracle.com/cd/B19306_01/backup.102/b14192/bku