v$database_block_corruption

SQL> select * from v$database_block_corruption;

     FILE#     BLOCK#     BLOCKS CORRUPTION_CHANGE# CORRUPTIO
---------- ---------- ---------- ------------------ ---------
         4     756652          1         5.5157E+12 CORRUPT

SQL> select segment_name, segment_type, owner
  2  from dba_extents
  3  where file_id = 4
  4  and 756652 between block_id
  5  and block_id + blocks -1;

no rows selected

DBVERIFY - Verification complete

Total Pages Examined         : 3932160
Total Pages Processed (Data) : 3119107
Total Pages Failing   (Data) : 0
Total Pages Processed (Index): 755048
Total Pages Failing   (Index): 70
Total Pages Processed (Other): 5352
Total Pages Processed (Seg)  : 0
Total Pages Failing   (Seg)  : 0
Total Pages Empty            : 52653
Total Pages Marked Corrupt   : 0
Total Pages Influx           : 0
Total Pages Encrypted        : 0
Highest block SCN            : 655636777 (1293.655636777)

DBVERIFY - Verification starting : FILE = /prd/dvp/ora/oradata/LHF/disk06/gds_t01_01.dbf
Block Checking: DBA = 21728172, Block Type = KTB-managed data block
**** kdxcoavs = -84 < 0, avail = 3129
---- end index block validation
Page 756652 failed with check code 6401 
##Please not here that 756652 is the same block# mentioned in v$database_block_corruption 

SELECT dbms_utility.data_block_address_block(21728172) "BLOCK", dbms_utility.data_block_address_file(21728172) "FILE" FROM dual;

     BLOCK       FILE
---------- ----------
    756652          5

SELECT e.owner, e.segment_type, e.segment_name, e.partition_name, c.file#
     , greatest(e.block_id, c.block#) corr_start_block#
     , least(e.block_id+e.blocks-1, c.block#+c.blocks-1) corr_end_block#
     , least(e.block_id+e.blocks-1, c.block#+c.blocks-1) 
       - greatest(e.block_id, c.block#) + 1 blocks_corrupted
     , null description
  FROM dba_extents e, v$database_block_corruption c
 WHERE e.file_id = c.file#
   AND e.block_id <= c.block# + c.blocks - 1
   AND e.block_id + e.blocks - 1 >= c.block#
UNION
SELECT s.owner, s.segment_type, s.segment_name, s.partition_name, c.file#
     , header_block corr_start_block#
     , header_block corr_end_block#
     , 1 blocks_corrupted
     , 'Segment Header' description
  FROM dba_segments s, v$database_block_corruption c
 WHERE s.header_file = c.file#
   AND s.header_block between c.block# and c.block# + c.blocks - 1
UNION
SELECT null owner, null segment_type, null segment_name, null partition_name, c.file#
     , greatest(f.block_id, c.block#) corr_start_block#
     , least(f.block_id+f.blocks-1, c.block#+c.blocks-1) corr_end_block#
     , least(f.block_id+f.blocks-1, c.block#+c.blocks-1) 
       - greatest(f.block_id, c.block#) + 1 blocks_corrupted
     , 'Free Block' description
  FROM dba_free_space f, v$database_block_corruption c
 WHERE f.file_id = c.file#
   AND f.block_id <= c.block# + c.blocks - 1
   AND f.block_id + f.blocks - 1 >= c.block#
order by file#, corr_start_block#;

OWNER                          SEGMENT_TYPE       SEGMENT_NAME
------------------------------ ------------------ ---------------------------------------------------------------------------------
PARTITION_NAME                      FILE# CORR_START_BLOCK# CORR_END_BLOCK# BLOCKS_CORRUPTED DESCRIPTION
------------------------------ ---------- ----------------- --------------- ---------------- --------------

                                        4            756652          756652                1 Free Block

SQL> select file_id, tablespace_name, file_name, round(bytes/1024/1024/1024,2) from dba_Data_Files where tablespace_name='GDS_T01'
  2  ;

   FILE_ID TABLESPACE_NAME                FILE_NAME                                                    ROUND(BYTES/1024/1024/1024,2)
---------- ------------------------------ ------------------------------------------------------------ -----------------------------
         4 GDS_T01                        /prd/dvp/ora/oradata/LHF/disk06/gds_t01_01.dbf                                          30
         7 GDS_T01                        /prd/dvp/ora/oradata/LHF/disk06/gds_t01_02.dbf                                          32
         8 GDS_T01                        /prd/dvp/ora/oradata/LHF/disk06/gds_t01_03.dbf                                          32
         9 GDS_T01                        /prd/dvp/ora/oradata/LHF/disk06/gds_t01_04.dbf                                          32
        10 GDS_T01                        /prd/dvp/ora/oradata/LHF/disk06/gds_t01_05.dbf                                           4

SQL> select tablespace_name, round(sum(bytes/1024/1024/1024),2) GB from dba_Data_Files where tablespace_name='GDS_T01' group by tablespace_name;

TABLESPACE_NAME                        GB
------------------------------ ----------
GDS_T01                               130

SQL> select tablespace_name, round(sum(bytes/1024/1024/1024),2) GB from dba_free_space where tablespace_name='GDS_T01' group by tablespace_name;

TABLESPACE_NAME                        GB
------------------------------ ----------
GDS_T01                             97.41