Playing with Oracle Free Block Corruption

First and foremost, thank you to all the bloggers sharing their knowledge.

My previous post on corruption is here
The corrupt.sql script was stolen from here
exec SYS.DBMS_BACKUP_RESTORE.resetCfileSection(35) was stolen from here

Free Block Corruption is from a data file block which is now Free but used to be occupied by a corrupted segment.

How to Format Corrupted Block Not Part of Any Segment (Doc ID 336133.1) is a good reference.

So how did I get here?

The objective is to remove rows from v$database_block_corruption and this can be done by running exec SYS.DBMS_BACKUP_RESTORE.resetCfileSection(35).

The caveat is when the next corruption check, v$database_block_corruption is populated again.

This appears to only treat the symptoms and not the root cause.

Here’s my test case:

LAX:(SYS@db01)> create tablespace corrupt datafile size 16m;

Tablespace created.

LAX:(SYS@db01)> create index hr.x on hr.departments_old(last_update) tablespace corrupt;

Index created.

LAX:(SYS@db01)> exit

$ rman target /

Recovery Manager: Release 11.2.0.3.0 - Production on Tue Oct 29 22:45:58 2013

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

connected to target database: DB01 (DBID=1452485914)

RMAN> validate tablespace corrupt;

Starting validate at 29-OCT-2013 22:46:05
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=34 device type=DISK
allocated channel: ORA_DISK_2
channel ORA_DISK_2: SID=37 device type=DISK
channel ORA_DISK_1: starting validation of datafile
channel ORA_DISK_1: specifying datafile(s) for validation
input datafile file number=00005 name=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf
channel ORA_DISK_1: validation complete, elapsed time: 00:00:01
List of Datafiles
=================

File Status Marked Corrupt Empty Blocks Blocks Examined High SCN
---- ------ -------------- ------------ --------------- ----------
5    OK     0              1917         2048            1833133
  File Name: /oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf
  Block Type Blocks Failing Blocks Processed
  ---------- -------------- ----------------
  Data       0              0
  Index      0              1
  Other      0              130

Finished validate at 29-OCT-2013 22:46:07

RMAN> exit

LAX:(SYS@db01)> @corrupt.sql

dd of=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf bs=8192 conv=notrunc seek=1051 << EOF
CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT CORRUPT CORRUPT CORRUPT corrupt corrupt
EOF

dd of=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf bs=8192 conv=notrunc seek=1043 << EOF
CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT CORRUPT CORRUPT CORRUPT corrupt corrupt
EOF

dd of=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf bs=8192 conv=notrunc seek=1047 << EOF
CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT CORRUPT CORRUPT CORRUPT corrupt corrupt
EOF

dd of=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf bs=8192 conv=notrunc seek=1045 << EOF
CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT CORRUPT CORRUPT CORRUPT corrupt corrupt
EOF

dd of=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf bs=8192 conv=notrunc seek=1034 << EOF
CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT CORRUPT CORRUPT CORRUPT corrupt corrupt
EOF

dd of=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf bs=8192 conv=notrunc seek=2308 << EOF
CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT CORRUPT CORRUPT CORRUPT corrupt corrupt
EOF

dd of=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf bs=8192 conv=notrunc seek=2274 << EOF
CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT CORRUPT CORRUPT CORRUPT corrupt corrupt
EOF

dd of=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf bs=8192 conv=notrunc seek=2258 << EOF
CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT CORRUPT CORRUPT CORRUPT corrupt corrupt
EOF

dd of=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf bs=8192 conv=notrunc seek=2292 << EOF
CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT CORRUPT CORRUPT CORRUPT corrupt corrupt
EOF

dd of=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf bs=8192 conv=notrunc seek=2362 << EOF
CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT CORRUPT CORRUPT CORRUPT corrupt corrupt
EOF

dd of=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf bs=8192 conv=notrunc seek=2244 << EOF
CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT CORRUPT CORRUPT CORRUPT corrupt corrupt
EOF

dd of=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf bs=8192 conv=notrunc seek=2390 << EOF
CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT CORRUPT CORRUPT CORRUPT corrupt corrupt
EOF

dd of=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf bs=8192 conv=notrunc seek=2283 << EOF
CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT CORRUPT CORRUPT CORRUPT corrupt corrupt
EOF

dd of=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf bs=8192 conv=notrunc seek=2228 << EOF
CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT CORRUPT CORRUPT CORRUPT corrupt corrupt
EOF

dd of=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf bs=8192 conv=notrunc seek=2304 << EOF
CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT CORRUPT CORRUPT CORRUPT corrupt corrupt
EOF

dd of=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf bs=8192 conv=notrunc seek=2234 << EOF
CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT CORRUPT CORRUPT CORRUPT corrupt corrupt
EOF

dd of=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf bs=8192 conv=notrunc seek=2238 << EOF
CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT CORRUPT CORRUPT CORRUPT corrupt corrupt
EOF

dd of=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf bs=8192 conv=notrunc seek=827 << EOF
CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT CORRUPT CORRUPT CORRUPT corrupt corrupt
EOF

dd of=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf bs=8192 conv=notrunc seek=843 << EOF
CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT CORRUPT CORRUPT CORRUPT corrupt corrupt
EOF

dd of=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf bs=8192 conv=notrunc seek=835 << EOF
CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT CORRUPT CORRUPT CORRUPT corrupt corrupt
EOF

dd of=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf bs=8192 conv=notrunc seek=131 << EOF 
CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT CORRUPT CORRUPT CORRUPT corrupt corrupt 
EOF 

21 rows selected. 

LAX:(SYS@db01)> exit

[oracle@lax:db01]/home/oracle
$ dd of=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf bs=8192 conv=notrunc seek=131 << EOF 
> CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT corrupt CORRUPT CORRUPT CORRUPT CORRUPT corrupt corrupt
> EOF
0+1 records in
0+1 records out
112 bytes (112 B) copied, 0.000109233 s, 1.0 MB/s


RMAN> validate tablespace corrupt;

Starting validate at 29-OCT-2013 22:46:42
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=33 device type=DISK
allocated channel: ORA_DISK_2
channel ORA_DISK_2: SID=16 device type=DISK
channel ORA_DISK_1: starting validation of datafile
channel ORA_DISK_1: specifying datafile(s) for validation
input datafile file number=00005 name=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf
channel ORA_DISK_1: validation complete, elapsed time: 00:00:03
List of Datafiles
=================

File Status Marked Corrupt Empty Blocks Blocks Examined High SCN
---- ------ -------------- ------------ --------------- ----------
5    FAILED 0              1917         2048            1833132
  File Name: /oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf
  Block Type Blocks Failing Blocks Processed
  ---------- -------------- ----------------
  Data       0              0
  Index      0              0
  Other      1              131

validate found one or more corrupt blocks

See trace file /u01/app/oracle/diag/rdbms/lax_db01/db01/trace/db01_ora_3351.trc for details
Finished validate at 29-OCT-2013 22:46:46

RMAN> exit

LAX:(SYS@db01)> @corrupt_seg.sql
LAX:(SYS@db01)> col OWNER for a20
LAX:(SYS@db01)> col FILE# for 999
LAX:(SYS@db01)> col BLOCK# for 99999
LAX:(SYS@db01)> col BLOCKS for 99999
LAX:(SYS@db01)> col s_blk# for 99999
LAX:(SYS@db01)> col e_blk# for 99999
LAX:(SYS@db01)> col CORRUPTION_CHANGE# for 999999999999
LAX:(SYS@db01)> col SEGMENT_NAME for a25
LAX:(SYS@db01)> col PARTITION_NAME for a25
LAX:(SYS@db01)> select instance_name from v$instance
  2  ;

INSTANCE_NAME
----------------
db01

LAX:(SYS@db01)> select * from v$database_block_corruption order by 1,2,3,4
  2  ;

FILE# BLOCK# BLOCKS CORRUPTION_CHANGE# CORRUPTIO
----- ------ ------ ------------------ ---------
    5    131      1                  0 CORRUPT

LAX:(SYS@db01)>
LAX:(SYS@db01)> SELECT e.owner, e.segment_type, e.segment_name, e.partition_name, c.file#
  2         , greatest(e.block_id, c.block#) s_blk#
  3         , least(e.block_id+e.blocks-1, c.block#+c.blocks-1) e_dblk#
  4         , least(e.block_id+e.blocks-1, c.block#+c.blocks-1)
  5         - greatest(e.block_id, c.block#) + 1 blk_corrupt
  6        , null description
  7  FROM dba_extents e, v$database_block_corruption c
  8  WHERE e.file_id = c.file#
  9  AND e.block_id <= c.block# + c.blocks - 1  10  AND e.block_id + e.blocks - 1 >= c.block#
 11  UNION
 12  SELECT s.owner, s.segment_type, s.segment_name, s.partition_name, c.file#
 13         , header_block s_blk#
 14         , header_block e_blk#
 15         , 1 blk_corrupt
 16         , 'Segment Header' description
 17  FROM dba_segments s, v$database_block_corruption c
 18  WHERE s.header_file = c.file#
 19  AND s.header_block between c.block# and c.block# + c.blocks - 1
 20  UNION
 21  SELECT null owner, null segment_type, null segment_name, null partition_name, c.file#
 22         , greatest(f.block_id, c.block#) s_blk#
 23         , least(f.block_id+f.blocks-1, c.block#+c.blocks-1) e_blk#
 24         , least(f.block_id+f.blocks-1, c.block#+c.blocks-1)
 25         - greatest(f.block_id, c.block#) + 1 blk_corrupt
 26         , 'Free Block' description
 27  FROM dba_free_space f, v$database_block_corruption c
 28  WHERE f.file_id = c.file#
 29  AND f.block_id <= c.block# + c.blocks - 1  30  AND f.block_id + f.blocks - 1 >= c.block#
 31  order by file#, s_blk#
 32  ;

OWNER                SEGMENT_TYPE       SEGMENT_NAME              PARTITION_NAME            FILE# S_BLK#    E_DBLK# BLK_CORRUPT DESCRIPTION
-------------------- ------------------ ------------------------- ------------------------- ----- ------ ---------- ----------- --------------
HR                   INDEX              X                                                       5    131        131           1

LAX:(SYS@db01)> drop index hr.x;

Index dropped.

LAX:(SYS@db01)>

RMAN> validate tablespace corrupt;

Starting validate at 29-OCT-2013 22:49:56
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=34 device type=DISK
allocated channel: ORA_DISK_2
channel ORA_DISK_2: SID=37 device type=DISK
channel ORA_DISK_1: starting validation of datafile
channel ORA_DISK_1: specifying datafile(s) for validation
input datafile file number=00005 name=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf
channel ORA_DISK_1: validation complete, elapsed time: 00:00:03
List of Datafiles
=================

File Status Marked Corrupt Empty Blocks Blocks Examined High SCN
---- ------ -------------- ------------ --------------- ----------
5    FAILED 0              1917         2048            1833264
  File Name: /oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf
  Block Type Blocks Failing Blocks Processed
  ---------- -------------- ----------------
  Data       0              0
  Index      0              0
  Other      1              131

validate found one or more corrupt blocks

See trace file /u01/app/oracle/diag/rdbms/lax_db01/db01/trace/db01_ora_3364.trc for details
Finished validate at 29-OCT-2013 22:50:00

RMAN>

LAX:(SYS@db01)> @corrupt_seg.sql
LAX:(SYS@db01)> col OWNER for a20
LAX:(SYS@db01)> col FILE# for 999
LAX:(SYS@db01)> col BLOCK# for 99999
LAX:(SYS@db01)> col BLOCKS for 99999
LAX:(SYS@db01)> col s_blk# for 99999
LAX:(SYS@db01)> col e_blk# for 99999
LAX:(SYS@db01)> col CORRUPTION_CHANGE# for 999999999999
LAX:(SYS@db01)> col SEGMENT_NAME for a25
LAX:(SYS@db01)> col PARTITION_NAME for a25
LAX:(SYS@db01)> select instance_name from v$instance
  2  ;

INSTANCE_NAME
----------------
db01

LAX:(SYS@db01)> select * from v$database_block_corruption order by 1,2,3,4
  2  ;

FILE# BLOCK# BLOCKS CORRUPTION_CHANGE# CORRUPTIO
----- ------ ------ ------------------ ---------
    5    131      1                  0 CORRUPT

LAX:(SYS@db01)>
LAX:(SYS@db01)> SELECT e.owner, e.segment_type, e.segment_name, e.partition_name, c.file#
  2         , greatest(e.block_id, c.block#) s_blk#
  3         , least(e.block_id+e.blocks-1, c.block#+c.blocks-1) e_dblk#
  4         , least(e.block_id+e.blocks-1, c.block#+c.blocks-1)
  5         - greatest(e.block_id, c.block#) + 1 blk_corrupt
  6        , null description
  7  FROM dba_extents e, v$database_block_corruption c
  8  WHERE e.file_id = c.file#
  9  AND e.block_id <= c.block# + c.blocks - 1  10  AND e.block_id + e.blocks - 1 >= c.block#
 11  UNION
 12  SELECT s.owner, s.segment_type, s.segment_name, s.partition_name, c.file#
 13         , header_block s_blk#
 14         , header_block e_blk#
 15         , 1 blk_corrupt
 16         , 'Segment Header' description
 17  FROM dba_segments s, v$database_block_corruption c
 18  WHERE s.header_file = c.file#
 19  AND s.header_block between c.block# and c.block# + c.blocks - 1
 20  UNION
 21  SELECT null owner, null segment_type, null segment_name, null partition_name, c.file#
 22         , greatest(f.block_id, c.block#) s_blk#
 23         , least(f.block_id+f.blocks-1, c.block#+c.blocks-1) e_blk#
 24         , least(f.block_id+f.blocks-1, c.block#+c.blocks-1)
 25         - greatest(f.block_id, c.block#) + 1 blk_corrupt
 26         , 'Free Block' description
 27  FROM dba_free_space f, v$database_block_corruption c
 28  WHERE f.file_id = c.file#
 29  AND f.block_id <= c.block# + c.blocks - 1  30  AND f.block_id + f.blocks - 1 >= c.block#
 31  order by file#, s_blk#
 32  ;

OWNER                SEGMENT_TYPE       SEGMENT_NAME              PARTITION_NAME            FILE# S_BLK#    E_DBLK# BLK_CORRUPT DESCRIPTION
-------------------- ------------------ ------------------------- ------------------------- ----- ------ ---------- ----------- --------------
                                                                                                5    131        131           1 Free Block

LAX:(SYS@db01)>
LAX:(SYS@db01)> exec SYS.DBMS_BACKUP_RESTORE.resetCfileSection(35);

PL/SQL procedure successfully completed.

LAX:(SYS@db01)> @corrupt_seg.sql
LAX:(SYS@db01)> set lines 200 pages 10000 echo on
LAX:(SYS@db01)> col OWNER for a20
LAX:(SYS@db01)> col FILE# for 999
LAX:(SYS@db01)> col BLOCK# for 99999
LAX:(SYS@db01)> col BLOCKS for 99999
LAX:(SYS@db01)> col s_blk# for 99999
LAX:(SYS@db01)> col e_blk# for 99999
LAX:(SYS@db01)> col CORRUPTION_CHANGE# for 999999999999
LAX:(SYS@db01)> col SEGMENT_NAME for a25
LAX:(SYS@db01)> col PARTITION_NAME for a25
LAX:(SYS@db01)> select instance_name from v$instance
  2  ;

INSTANCE_NAME
----------------
db01

LAX:(SYS@db01)> select * from v$database_block_corruption order by 1,2,3,4
  2  ;

no rows selected

LAX:(SYS@db01)>
LAX:(SYS@db01)> SELECT e.owner, e.segment_type, e.segment_name, e.partition_name, c.file#
  2         , greatest(e.block_id, c.block#) s_blk#
  3         , least(e.block_id+e.blocks-1, c.block#+c.blocks-1) e_dblk#
  4         , least(e.block_id+e.blocks-1, c.block#+c.blocks-1)
  5         - greatest(e.block_id, c.block#) + 1 blk_corrupt
  6        , null description
  7  FROM dba_extents e, v$database_block_corruption c
  8  WHERE e.file_id = c.file#
  9  AND e.block_id <= c.block# + c.blocks - 1  10  AND e.block_id + e.blocks - 1 >= c.block#
 11  UNION
 12  SELECT s.owner, s.segment_type, s.segment_name, s.partition_name, c.file#
 13         , header_block s_blk#
 14         , header_block e_blk#
 15         , 1 blk_corrupt
 16         , 'Segment Header' description
 17  FROM dba_segments s, v$database_block_corruption c
 18  WHERE s.header_file = c.file#
 19  AND s.header_block between c.block# and c.block# + c.blocks - 1
 20  UNION
 21  SELECT null owner, null segment_type, null segment_name, null partition_name, c.file#
 22         , greatest(f.block_id, c.block#) s_blk#
 23         , least(f.block_id+f.blocks-1, c.block#+c.blocks-1) e_blk#
 24         , least(f.block_id+f.blocks-1, c.block#+c.blocks-1)
 25         - greatest(f.block_id, c.block#) + 1 blk_corrupt
 26         , 'Free Block' description
 27  FROM dba_free_space f, v$database_block_corruption c
 28  WHERE f.file_id = c.file#
 29  AND f.block_id <= c.block# + c.blocks - 1  30  AND f.block_id + f.blocks - 1 >= c.block#
 31  order by file#, s_blk#
 32  ;

no rows selected

LAX:(SYS@db01)>
LAX:(SYS@db01)>

RMAN> validate tablespace corrupt;

Starting validate at 29-OCT-2013 22:51:54
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=33 device type=DISK
allocated channel: ORA_DISK_2
channel ORA_DISK_2: SID=16 device type=DISK
channel ORA_DISK_1: starting validation of datafile
channel ORA_DISK_1: specifying datafile(s) for validation
input datafile file number=00005 name=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf
channel ORA_DISK_1: validation complete, elapsed time: 00:00:03
List of Datafiles
=================

File Status Marked Corrupt Empty Blocks Blocks Examined High SCN
---- ------ -------------- ------------ --------------- ----------
5    FAILED 0              1917         2048            1833264
  File Name: /oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf
  Block Type Blocks Failing Blocks Processed
  ---------- -------------- ----------------
  Data       0              0
  Index      0              0
  Other      1              131

validate found one or more corrupt blocks

See trace file /u01/app/oracle/diag/rdbms/lax_db01/db01/trace/db01_ora_3382.trc for details
Finished validate at 29-OCT-2013 22:51:58

RMAN>

LAX:(SYS@db01)> @corrupt_seg.sql
LAX:(SYS@db01)> col OWNER for a20
LAX:(SYS@db01)> col FILE# for 999
LAX:(SYS@db01)> col BLOCK# for 99999
LAX:(SYS@db01)> col BLOCKS for 99999
LAX:(SYS@db01)> col s_blk# for 99999
LAX:(SYS@db01)> col e_blk# for 99999
LAX:(SYS@db01)> col CORRUPTION_CHANGE# for 999999999999
LAX:(SYS@db01)> col SEGMENT_NAME for a25
LAX:(SYS@db01)> col PARTITION_NAME for a25
LAX:(SYS@db01)> select instance_name from v$instance
  2  ;

INSTANCE_NAME
----------------
db01

LAX:(SYS@db01)> select * from v$database_block_corruption order by 1,2,3,4
  2  ;

FILE# BLOCK# BLOCKS CORRUPTION_CHANGE# CORRUPTIO
----- ------ ------ ------------------ ---------
    5    131      1                  0 CORRUPT

LAX:(SYS@db01)>
LAX:(SYS@db01)> SELECT e.owner, e.segment_type, e.segment_name, e.partition_name, c.file#
  2         , greatest(e.block_id, c.block#) s_blk#
  3         , least(e.block_id+e.blocks-1, c.block#+c.blocks-1) e_dblk#
  4         , least(e.block_id+e.blocks-1, c.block#+c.blocks-1)
  5         - greatest(e.block_id, c.block#) + 1 blk_corrupt
  6        , null description
  7  FROM dba_extents e, v$database_block_corruption c
  8  WHERE e.file_id = c.file#
  9  AND e.block_id <= c.block# + c.blocks - 1  10  AND e.block_id + e.blocks - 1 >= c.block#
 11  UNION
 12  SELECT s.owner, s.segment_type, s.segment_name, s.partition_name, c.file#
 13         , header_block s_blk#
 14         , header_block e_blk#
 15         , 1 blk_corrupt
 16         , 'Segment Header' description
 17  FROM dba_segments s, v$database_block_corruption c
 18  WHERE s.header_file = c.file#
 19  AND s.header_block between c.block# and c.block# + c.blocks - 1
 20  UNION
 21  SELECT null owner, null segment_type, null segment_name, null partition_name, c.file#
 22         , greatest(f.block_id, c.block#) s_blk#
 23         , least(f.block_id+f.blocks-1, c.block#+c.blocks-1) e_blk#
 24         , least(f.block_id+f.blocks-1, c.block#+c.blocks-1)
 25         - greatest(f.block_id, c.block#) + 1 blk_corrupt
 26         , 'Free Block' description
 27  FROM dba_free_space f, v$database_block_corruption c
 28  WHERE f.file_id = c.file#
 29  AND f.block_id <= c.block# + c.blocks - 1  30  AND f.block_id + f.blocks - 1 >= c.block#
 31  order by file#, s_blk#
 32  ;

OWNER                SEGMENT_TYPE       SEGMENT_NAME              PARTITION_NAME            FILE# S_BLK#    E_DBLK# BLK_CORRUPT DESCRIPTION
-------------------- ------------------ ------------------------- ------------------------- ----- ------ ---------- ----------- --------------
                                                                                                5    131        131           1 Free Block

LAX:(SYS@db01)>
LAX:(SYS@db01)>

Update:

Team mate has suggested the following article:

How to Clean entries from V$DATABASE_BLOCK_CORRUPTION when listing file/block corruption for a Datafile/Tablespace that was already dropped (Doc ID 1484189.1)

Following the note above to perform backup check logical does not solve the issue.

RMAN> backup check logical validate tablespace corrupt;

Starting backup at 30-OCT-2013 06:55:09
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=34 device type=DISK
allocated channel: ORA_DISK_2
channel ORA_DISK_2: SID=30 device type=DISK
channel ORA_DISK_1: starting compressed full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00005 name=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:03
List of Datafiles
=================
File Status Marked Corrupt Empty Blocks Blocks Examined High SCN
---- ------ -------------- ------------ --------------- ----------
5    FAILED 0              1917         2048            1833264
  File Name: /oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf
  Block Type Blocks Failing Blocks Processed
  ---------- -------------- ----------------
  Data       0              0
  Index      0              0
  Other      1              131

validate found one or more corrupt blocks
See trace file /u01/app/oracle/diag/rdbms/lax_db01/db01/trace/db01_ora_2183.trc for details
Finished backup at 30-OCT-2013 06:55:13

RMAN> backup check logical validate datafile 5;

Starting backup at 30-OCT-2013 06:55:37
using channel ORA_DISK_1
using channel ORA_DISK_2
channel ORA_DISK_1: starting compressed full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00005 name=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:03
List of Datafiles
=================
File Status Marked Corrupt Empty Blocks Blocks Examined High SCN
---- ------ -------------- ------------ --------------- ----------
5    FAILED 0              1917         2048            1833264
  File Name: /oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97177krz_.dbf
  Block Type Blocks Failing Blocks Processed
  ---------- -------------- ----------------
  Data       0              0
  Index      0              0
  Other      1              131

validate found one or more corrupt blocks
See trace file /u01/app/oracle/diag/rdbms/lax_db01/db01/trace/db01_ora_2183.trc for details
Finished backup at 30-OCT-2013 06:55:40

RMAN>

LAX:(SYS@db01)> set lines 200 pages 10000 echo on
LAX:(SYS@db01)> col OWNER for a20
LAX:(SYS@db01)> col FILE# for 999
LAX:(SYS@db01)> col BLOCK# for 99999
LAX:(SYS@db01)> col BLOCKS for 99999
LAX:(SYS@db01)> col s_blk# for 99999
LAX:(SYS@db01)> col e_blk# for 99999
LAX:(SYS@db01)> col CORRUPTION_CHANGE# for 999999999999
LAX:(SYS@db01)> col SEGMENT_NAME for a25
LAX:(SYS@db01)> col PARTITION_NAME for a25
LAX:(SYS@db01)> select instance_name from v$instance
  2  ;

INSTANCE_NAME
----------------
db01

LAX:(SYS@db01)> select * from v$database_block_corruption order by 1,2,3,4
  2  ;

FILE# BLOCK# BLOCKS CORRUPTION_CHANGE# CORRUPTIO
----- ------ ------ ------------------ ---------
    5    131      1                  0 CORRUPT

LAX:(SYS@db01)>
LAX:(SYS@db01)> SELECT e.owner, e.segment_type, e.segment_name, e.partition_name, c.file#
  2         , greatest(e.block_id, c.block#) s_blk#
  3         , least(e.block_id+e.blocks-1, c.block#+c.blocks-1) e_dblk#
  4         , least(e.block_id+e.blocks-1, c.block#+c.blocks-1)
  5         - greatest(e.block_id, c.block#) + 1 blk_corrupt
  6        , null description
  7  FROM dba_extents e, v$database_block_corruption c
  8  WHERE e.file_id = c.file#
  9  AND e.block_id <= c.block# + c.blocks - 1  10  AND e.block_id + e.blocks - 1 >= c.block#
 11  UNION
 12  SELECT s.owner, s.segment_type, s.segment_name, s.partition_name, c.file#
 13         , header_block s_blk#
 14         , header_block e_blk#
 15         , 1 blk_corrupt
 16         , 'Segment Header' description
 17  FROM dba_segments s, v$database_block_corruption c
 18  WHERE s.header_file = c.file#
 19  AND s.header_block between c.block# and c.block# + c.blocks - 1
 20  UNION
 21  SELECT null owner, null segment_type, null segment_name, null partition_name, c.file#
 22         , greatest(f.block_id, c.block#) s_blk#
 23         , least(f.block_id+f.blocks-1, c.block#+c.blocks-1) e_blk#
 24         , least(f.block_id+f.blocks-1, c.block#+c.blocks-1)
 25         - greatest(f.block_id, c.block#) + 1 blk_corrupt
 26         , 'Free Block' description
 27  FROM dba_free_space f, v$database_block_corruption c
 28  WHERE f.file_id = c.file#
 29  AND f.block_id <= c.block# + c.blocks - 1  30  AND f.block_id + f.blocks - 1 >= c.block#
 31  order by file#, s_blk#
 32  ;

OWNER                SEGMENT_TYPE       SEGMENT_NAME              PARTITION_NAME            FILE# S_BLK#    E_DBLK# BLK_CORRUPT DESCRIPTION
-------------------- ------------------ ------------------------- ------------------------- ----- ------ ---------- ----------- --------------
                                                                                                5    131        131           1 Free Block

LAX:(SYS@db01)> drop tablespace corrupt including contents and datafiles;

Tablespace dropped.

LAX:(SYS@db01)> @corrupt_seg.sql
LAX:(SYS@db01)> set lines 200 pages 10000 echo on
LAX:(SYS@db01)> col OWNER for a20
LAX:(SYS@db01)> col FILE# for 999
LAX:(SYS@db01)> col BLOCK# for 99999
LAX:(SYS@db01)> col BLOCKS for 99999
LAX:(SYS@db01)> col s_blk# for 99999
LAX:(SYS@db01)> col e_blk# for 99999
LAX:(SYS@db01)> col CORRUPTION_CHANGE# for 999999999999
LAX:(SYS@db01)> col SEGMENT_NAME for a25
LAX:(SYS@db01)> col PARTITION_NAME for a25
LAX:(SYS@db01)> select instance_name from v$instance
  2  ;

INSTANCE_NAME
----------------
db01

LAX:(SYS@db01)> select * from v$database_block_corruption order by 1,2,3,4
  2  ;

no rows selected

LAX:(SYS@db01)>

Does anyone have or know of a short cut for this?

SOLVED:

I am getting good at corrupting data.

OWNER                SEGMENT_TYPE       SEGMENT_NAME              PARTITION_NAME            FILE# S_BLK#    E_DBLK# BLK_CORRUPT DESCRIPTION
-------------------- ------------------ ------------------------- ------------------------- ----- ------ ---------- ----------- --------------
                                                                                                5    827        827           1 Free Block
                                                                                                5    835        835           1 Free Block

LAX:(SYS@db01)>
LAX:(SYS@db01)> exit
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
[oracle@lax:db01]/home/oracle
$ rman target /

Recovery Manager: Release 11.2.0.3.0 - Production on Wed Oct 30 07:34:39 2013

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

connected to target database: DB01 (DBID=1452485914)

RMAN> validate tablespace corrupt;

Starting validate at 30-OCT-2013 07:34:50
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=42 device type=DISK
allocated channel: ORA_DISK_2
channel ORA_DISK_2: SID=44 device type=DISK
channel ORA_DISK_1: starting validation of datafile
channel ORA_DISK_1: specifying datafile(s) for validation
input datafile file number=00005 name=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97261fmr_.dbf
channel ORA_DISK_1: validation complete, elapsed time: 00:00:03
List of Datafiles
=================
File Status Marked Corrupt Empty Blocks Blocks Examined High SCN
---- ------ -------------- ------------ --------------- ----------
5    FAILED 0              1915         2048            1859108
  File Name: /oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97261fmr_.dbf
  Block Type Blocks Failing Blocks Processed
  ---------- -------------- ----------------
  Data       0              0
  Index      0              1
  Other      2              132

validate found one or more corrupt blocks
See trace file /u01/app/oracle/diag/rdbms/lax_db01/db01/trace/db01_ora_2608.trc for details
Finished validate at 30-OCT-2013 07:34:54

RMAN> list backup summary;

specification does not match any backup in the repository

RMAN> backup check logical tablespace corrupt;

Starting backup at 30-OCT-2013 07:35:48
using channel ORA_DISK_1
using channel ORA_DISK_2
channel ORA_DISK_1: starting compressed full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00005 name=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97261fmr_.dbf
channel ORA_DISK_1: starting piece 1 at 30-OCT-2013 07:35:49
channel ORA_DISK_1: finished piece 1 at 30-OCT-2013 07:35:52
piece handle=/oracle/backup/bkup_8qonmdml_1_1 tag=TAG20131030T073548 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:03
Finished backup at 30-OCT-2013 07:35:52

Starting Control File and SPFILE Autobackup at 30-OCT-2013 07:35:52
piece handle=/oracle/flashrecovery/LAX_DB01/autobackup/2013_10_30/o1_mf_s_830158552_9726bdgf_.bkp comment=NONE
Finished Control File and SPFILE Autobackup at 30-OCT-2013 07:35:59

RMAN> blockrecover datafile 5 block 827,835;

Starting recover at 30-OCT-2013 07:39:09
using channel ORA_DISK_1
using channel ORA_DISK_2

channel ORA_DISK_1: restoring block(s)
channel ORA_DISK_1: specifying block(s) to restore from backup set
restoring blocks of datafile 00005
channel ORA_DISK_1: reading from backup piece /oracle/backup/bkup_8qonmdml_1_1
channel ORA_DISK_1: piece handle=/oracle/backup/bkup_8qonmdml_1_1 tag=TAG20131030T073548
channel ORA_DISK_1: restored block(s) from backup piece 1
channel ORA_DISK_1: block restore complete, elapsed time: 00:00:01

starting media recovery
media recovery complete, elapsed time: 00:00:04

Finished recover at 30-OCT-2013 07:39:17

RMAN> validate tablespace corrupt;

Starting validate at 30-OCT-2013 07:39:25
using channel ORA_DISK_1
using channel ORA_DISK_2
channel ORA_DISK_1: starting validation of datafile
channel ORA_DISK_1: specifying datafile(s) for validation
input datafile file number=00005 name=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97261fmr_.dbf
channel ORA_DISK_1: validation complete, elapsed time: 00:00:01
List of Datafiles
=================
File Status Marked Corrupt Empty Blocks Blocks Examined High SCN
---- ------ -------------- ------------ --------------- ----------
5    OK     0              1915         2050            1859108
  File Name: /oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_97261fmr_.dbf
  Block Type Blocks Failing Blocks Processed
  ---------- -------------- ----------------
  Data       0              0
  Index      0              1
  Other      0              132

Finished validate at 30-OCT-2013 07:39:27

RMAN> exit

Recovery Manager complete.
[oracle@lax:db01]/home/oracle
$

New Rman Blockrecover command in 11g (Recover corruption list) (Doc ID 1390759.1)

Note: For 11g, recover corruption list can be used to recovery all corruption versus listing them one by one.

I am not sure if blockrecover corruption list would have worked on 10g as well. May be you can try it and let me know?

RMAN> recover corruption list;

Starting recover at 30-OCT-2013 07:22:56
using channel ORA_DISK_1
using channel ORA_DISK_2

channel ORA_DISK_1: restoring block(s)
channel ORA_DISK_1: specifying block(s) to restore from backup set
restoring blocks of datafile 00005
channel ORA_DISK_1: reading from backup piece /oracle/backup/bkup_4gonmcsj_1_1
channel ORA_DISK_1: piece handle=/oracle/backup/bkup_4gonmcsj_1_1 tag=TAG20131030T072154
channel ORA_DISK_1: restored block(s) from backup piece 1
channel ORA_DISK_1: block restore complete, elapsed time: 00:00:03

starting media recovery
media recovery complete, elapsed time: 00:00:04

Finished recover at 30-OCT-2013 07:23:09

RMAN> validate tablespace corrupt;

Starting validate at 30-OCT-2013 07:23:20
using channel ORA_DISK_1
using channel ORA_DISK_2
channel ORA_DISK_1: starting validation of datafile
channel ORA_DISK_1: specifying datafile(s) for validation
input datafile file number=00005 name=/oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_9724xr04_.dbf
channel ORA_DISK_1: validation complete, elapsed time: 00:00:01
List of Datafiles
=================
File Status Marked Corrupt Empty Blocks Blocks Examined High SCN
—- —— ————– ———— ————— ———-
5 OK 0 1916 2050 1856947
File Name: /oracle/datafilecopy/LAX_DB01/datafile/o1_mf_corrupt_9724xr04_.dbf
Block Type Blocks Failing Blocks Processed
———- ————– —————-
Data 0 0
Index 0 0
Other 0 132

Finished validate at 30-OCT-2013 07:23:22

RMAN>

Playing with Oracle Free Block Corruption

Update:

SOLVED:

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