Help on block corruption (URGENT ...!)

Question

Hi all.
I have a Oracle 10g Rel1 database on a linux box who is presenting block corruption at the system tablespace level.
This database IS NOT in archive mode.
Message says:
ORA-01578: bloque de datos ORACLE corrupto (archivo numero 1, bloque numero *47132*)
ORA-01110: archivo de datos *1: '/u01/oradata/BADAN1/BADAN1/system01.dbf'*
This script is suppose to tell me which is the segment holding corrupted block:
SQL> SELECT e.file_id,
2 e.block_id,
3 e.owner,
4 e.segment_name,
5 e.segment_type
6 FROM dba_extents e
7 WHERE
8 file_id=1 and 47132 BETWEEN 47132 AND 47132 + blocks - 1
9 /
FROM dba_extents e
ERROR at line 6:
ORA-01578: ORACLE data block corrupted (file # 1, block # 47132)
ORA-01110: data file 1: '/u01/oradata/BADAN1/BADAN1/system01.dbf'
It seems base tables associated with dba_extents view are related in this case:
select ds.owner, ds.segment_name, ds.partition_name, ds.segment_type,
ds.tablespace_name,
e.ext#, f.file#, e.block#, e.length * ds.blocksize, e.length, e.file#
from sys.uet$ e, sys.sys_dba_segs ds, sys.file$ f
where e.segfile# = ds.relative_fno
and e.segblock# = ds.header_block
and e.ts# = ds.tablespace_id
and e.ts# = f.ts#
and e.file# = f.relfile#
and bitand(NVL(ds.segment_flags,0), 1) = 0
and bitand(NVL(ds.segment_flags,0), 65536) = 0
union all
select /*+ ordered use_nl(e) use_nl(f) */
ds.owner, ds.segment_name, ds.partition_name, ds.segment_type,
ds.tablespace_name,
e.ktfbueextno, f.file#, e.ktfbuebno,
e.ktfbueblks * ds.blocksize, e.ktfbueblks, e.ktfbuefno
from sys.sys_dba_segs ds, sys.x$ktfbue e, sys.file$ f
where e.ktfbuesegfno = ds.relative_fno
and e.ktfbuesegbno = ds.header_block
and e.ktfbuesegtsn = ds.tablespace_id
and e.ktfbuesegtsn = f.ts#
and e.ktfbuefno = f.relfile#
and bitand(NVL(ds.segment_flags, 0), 1) = 1
and bitand(NVL(ds.segment_flags,0), 65536) = 0
Please anybody advise on what to do ...!
Regards, Luis ...!

Answer 1

myluism wrote:
Hi all.
I have a Oracle 10g Rel1 database on a linux box who is presenting block corruption at the system tablespace level.
This database IS NOT in archive mode.
Message says:
ORA-01578: bloque de datos ORACLE corrupto (archivo numero 1, bloque numero *47132*)
ORA-01110: archivo de datos *1: '/u01/oradata/BADAN1/BADAN1/system01.dbf'*
This script is suppose to tell me which is the segment holding corrupted block:
SQL> SELECT e.file_id,
2 e.block_id,
3 e.owner,
4 e.segment_name,
5 e.segment_type
6 FROM dba_extents e
7 WHERE
8 file_id=1 and 47132 BETWEEN 47132 AND 47132 + blocks - 1
9 /
FROM dba_extents e
ERROR at line 6:
ORA-01578: ORACLE data block corrupted (file # 1, block # 47132)
ORA-01110: data file 1: '/u01/oradata/BADAN1/BADAN1/system01.dbf'That query doesn't look right to me. Try this:
SELECT e.file_id,
e.block_id,
e.owner,
e.segment_name,
e.segment_type
FROM dba_extents e
WHERE
file_id=1  and 47132 BETWEEN block_id  AND block_id + blocks - 1
/Let us know the result of that query.
-Mark