[转]RMAN检测数据库坏块

backup validate check logical database;

select * from v$database_block_corruption;

RMAN> backup validate check logical database;

Starting backup at 02-SEP-15
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=141 device type=DISK
allocated channel: ORA_DISK_2
channel ORA_DISK_2: SID=9 device type=DISK
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00001 name=/u02/app/oradata/ORCL/system01.dbf
input datafile file number=00006 name=/u02/app/oradata/ORCL/rlst01.dbf
input datafile file number=00005 name=/u02/app/oradata/ORCL/mssm01.dbf
channel ORA_DISK_2: starting full datafile backup set
channel ORA_DISK_2: specifying datafile(s) in backup set
input datafile file number=00002 name=/u02/app/oradata/ORCL/sysaux01.dbf
input datafile file number=00003 name=/u02/app/oradata/ORCL/undotbs01.dbf
input datafile file number=00004 name=/u02/app/oradata/ORCL/users01.dbf
channel ORA_DISK_2: backup set complete, elapsed time: 00:00:25
List of Datafiles
=================
File Status Marked Corrupt Empty Blocks Blocks Examined High SCN
---- ------ -------------- ------------ --------------- ----------
2    OK     0              17775        84503           3456527
File Name: /u02/app/oradata/ORCL/sysaux01.dbf
Block Type Blocks Failing Blocks Processed
---------- -------------- ----------------
Data       0              20940
Index      0              17430
Other      0              28335

File Status Marked Corrupt Empty Blocks Blocks Examined High SCN
---- ------ -------------- ------------ --------------- ----------
3    OK     0              1            26893           3456665
File Name: /u02/app/oradata/ORCL/undotbs01.dbf
Block Type Blocks Failing Blocks Processed
---------- -------------- ----------------
Data       0              0
Index      0              0
Other      0              26879

File Status Marked Corrupt Empty Blocks Blocks Examined High SCN
---- ------ -------------- ------------ --------------- ----------
4    OK     0              14           643             2732847
File Name: /u02/app/oradata/ORCL/users01.dbf
Block Type Blocks Failing Blocks Processed
---------- -------------- ----------------
Data       0              48
Index      0              2
Other      0              576

channel ORA_DISK_2: starting full datafile backup set
channel ORA_DISK_2: specifying datafile(s) in backup set
including current control file in backup set
channel ORA_DISK_2: backup set complete, elapsed time: 00:00:01
List of Control File and SPFILE
===============================
File Type    Status Blocks Failing Blocks Examined
------------ ------ -------------- ---------------
Control File OK     0              614
channel ORA_DISK_2: starting full datafile backup set
channel ORA_DISK_2: specifying datafile(s) in backup set
including current SPFILE in backup set
channel ORA_DISK_2: backup set complete, elapsed time: 00:00:00
List of Control File and SPFILE
===============================
File Type    Status Blocks Failing Blocks Examined
------------ ------ -------------- ---------------
SPFILE       OK     0              2
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:42
List of Datafiles
=================
File Status Marked Corrupt Empty Blocks Blocks Examined High SCN
---- ------ -------------- ------------ --------------- ----------
1    OK     0              13138        88333           3456665
File Name: /u02/app/oradata/ORCL/system01.dbf
Block Type Blocks Failing Blocks Processed
---------- -------------- ----------------
Data       0              59322
Index      0              12665
Other      0              3195

File Status Marked Corrupt Empty Blocks Blocks Examined High SCN
---- ------ -------------- ------------ --------------- ----------
5    OK     0              12670        12800           1408151
File Name: /u02/app/oradata/ORCL/mssm01.dbf
Block Type Blocks Failing Blocks Processed
---------- -------------- ----------------
Data       0              2
Index      0              0
Other      0              128

File Status Marked Corrupt Empty Blocks Blocks Examined High SCN
---- ------ -------------- ------------ --------------- ----------
6    OK     0              22441        25600           2098889
File Name: /u02/app/oradata/ORCL/rlst01.dbf
Block Type Blocks Failing Blocks Processed
---------- -------------- ----------------
Data       0              2739
Index      0              158
Other      0              262

Finished backup at 02-SEP-15

利用数据字典表查询是否有坏块

SQL> desc v$database_block_corruption
Name                                      Null?    Type
----------------------------------------- -------- ----------------------------
FILE#                                              NUMBER
BLOCK#                                             NUMBER
BLOCKS                                             NUMBER
CORRUPTION_CHANGE#                                 NUMBER
CORRUPTION_TYPE                                    VARCHAR2(9)

SQL> select * from v$database_block_corruption;

no rows selected

如果存在坏块可使用以下脚本查询：

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#;

SELECT tablespace_name, segment_type, owner, segment_name
FROM dba_extents
WHERE file_id = &fileid
and &blockid between block_id AND block_id + blocks - 1;

参考：http://www.cnblogs.com/macleanoracle/archive/2013/03/19/2968101.html