How to check the block corruptions in database ?

How to check the block corruptions in database ?

RMAN Level:

RMAN> backup validate check logical datafile <<<file_number>>>;

RMAN> backup validate check logical database;

SQLPLUS Level:

sqlplus / as sysdba

select * from v$database_block_corruption;

OS Level:

The following example shows a sample use of the command-line interface to this mode of DBVERIFY.

% dbv FILE=t_db1.dbf feedback=100 >replace the file

dbv FILE=/u05/oradb/TEST/db/apps_st/data/eqddasm.dbf FEEDBACK=100