Block corruption in sys schema

hi,
I have a table in sys schema (sorry for creating a table in sys schema) and now it says one block is corrupted while selecting from it. I don't have a backup of the table. Is there any option to repair it without shutting down the database? (i cannot use rman to do blockrecover)
thanks
alimajaf

You haven't given much details about your environment or the corruption in question.
Did you try DBMS_REPAIR?
Regards
Venkat

Similar Messages

Oracle V11.2.0.3 ORA-01578: ORACLE data block corrupted - OBJECT = IDL_UB1$

Hi,
I am running into a data corruption issue.
My database is:
SQL> select banner from v$version;
BANNER
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - Production
PL/SQL Release 11.2.0.3.0 - Production
CORE 11.2.0.3.0 Production
TNS for Linux: Version 11.2.0.3.0 - Production
NLSRTL Version 11.2.0.3.0 - Production
The following information is written to the alert.log File
alert.log File
Mon Nov 07 17:24:12 2011
Starting ORACLE instance (normal)
LICENSE_MAX_SESSION = 0
LICENSE_SESSIONS_WARNING = 0
Picked latch-free SCN scheme 2
Using LOG_ARCHIVE_DEST_1 parameter default value as USE_DB_RECOVERY_FILE_DEST
Autotune of undo retention is turned on.
IMODE=BR
ILAT =27
LICENSE_MAX_USERS = 0
SYS auditing is disabled
Starting up:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - Production.
ORACLE_HOME = /home/oracle/dbhome
System name: Linux
Node name: dbl-ora
Release: 2.6.18-274.3.1.el5 (This is rhel5.7 or CentOs5.7)
Version: #1 SMP Tue Sep 6 20:14:03 EDT 2011
Machine: i686 / vm
Mon Nov 07 19:42:14 2011
Corrupt Block Found
TSN = 0, TSNAME = SYSTEM
RFN = 1, BLK = 52346, RDBA = 4246650
OBJN = 225, OBJD = 225, OBJECT = IDL_UB1$, SUBOBJECT =
SEGMENT OWNER = SYS, SEGMENT TYPE = Table Segment
Errors in file /home/oracle/diag/rdbms/ora11/K/trace/K_ora_5425.trc (incident=11053):
ORA-01578: ORACLE data block corrupted (file # 1, block # 52346)
ORA-01110: data file 1: '/home/oracle/oradata/ora11/system01.dbf'
Incident details in: /home/oracle/diag/rdbms/ora11/K/incident/incdir_11053/K_ora_5425_i11053.trc
I was even able to detect the row that is generating the issue.
In my case the obj# 33573 until 33577 are causing the issue,
though I have no idea what sort of objects are affected.
SQL> select * from idl_ub1$ where obj#=33572;
OBJ# PART VERSION PIECE# LENGTH P
33572 1 0 0 9032 F
SQL> select * from idl_ub1$ where obj#=33573;
ERROR:
ORA-01578: ORACLE data block corrupted (file # 1, block # 52346)
ORA-01110: data file 1: '/home/oracle/oradata/ora11/system01.dbf'
no rows selected
SQL> select * from idl_ub1$ where obj#=33577;
ERROR:
ORA-01578: ORACLE data block corrupted (file # 1, block # 52358)
ORA-01110: data file 1: '/home/oracle/oradata/ora11/system01.dbf'
no rows selected
SQL> select * from idl_ub1$ where obj#=33578;
OBJ# PART VERSION PIECE# LENGTH P
33578 1 0 0 9032 F
Any idea, how to fix this problem without recreating the whole database?
Thanks in advance.
wmager
Edited by: magerxr on Nov 7, 2011 8:27 AM

magerxr wrote:
Thanks again for your quick advise.
Here comes the result of dbv against my system tablespace.
[oracle@dbl-ora ~]$ dbv FILE=/home/oracle/oradata/ora11/system01.dbf
DBVERIFY: Release 11.2.0.3.0 - Production on Mon Nov 7 22:39:11 2011
Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
DBVERIFY - Verification starting : FILE = /home/oracle/oradata/ora11/system01.dbf
Page 52346 is influx - most likely media corrupt
Corrupt block relative dba: 0x0040cc7a (file 1, block 52346)
Fractured block found during dbv:
Data in bad block:
type: 6 format: 2 rdba: 0x0040cc7a
last change scn: 0x0000.0010acfa seq: 0x1 flg: 0x04
spare1: 0x0 spare2: 0x0 spare3: 0x0
consistency value in tail: 0x00000000
check value in block header: 0x8fda
computed block checksum: 0xaafbselect owner, segment_type, segment_name from dba_extents
where file_id = 1 and 52346 between block_id and block_id+blocks-1;
>
Page 52347 is marked corrupt
Corrupt block relative dba: 0x0040cc7b (file 1, block 52347)
Bad header found during dbv:
Data in bad block:
type: 1 format: 6 rdba: 0x0000a206
last change scn: 0xacfa.0040cc7b seq: 0x10 flg: 0x00
spare1: 0xfa spare2: 0xac spare3: 0x401
consistency value in tail: 0x00000000
check value in block header: 0x0
block checksum disabled
select owner, segment_type, segment_name from dba_extents
where file_id = 1 and 52347 between block_id and block_id+blocks-1;
Page 52361 is marked corrupt
Corrupt block relative dba: 0x0040cc89 (file 1, block 52361)
Bad header found during dbv:
Data in bad block:
type: 1 format: 6 rdba: 0x0000a206
last change scn: 0xacfb.0040cc89 seq: 0x10 flg: 0x00
spare1: 0xfb spare2: 0xac spare3: 0x401
consistency value in tail: 0x32298500
check value in block header: 0x0
block checksum disabled
select owner, segment_type, segment_name from dba_extents
where file_id = 1 and 52361 between block_id and block_id+blocks-1;
>
>
DBVERIFY - Verification complete
Total Pages Examined : 122880
Total Pages Processed (Data) : 81298
Total Pages Failing (Data) : 0
Total Pages Processed (Index): 22307
Total Pages Failing (Index): 0
Total Pages Processed (Other): 3349
Total Pages Processed (Seg) : 1
Total Pages Failing (Seg) : 0
Total Pages Empty : 15910
Total Pages Marked Corrupt : 16
Total Pages Influx : 1
Total Pages Encrypted : 0
Highest block SCN : 4064615 (0.4064615)post results from 3 SQL above

Block corruption problem in alert and rman/dbv no show errors

Hello, I'm new in Oracle's world. I have one problem with Oracle 10.2.0.4 (RHEL 5.6) x64. Archive redo-log enable
In the alert.log, three days ago show (the server have kernel panic & rebooted):
Mon Sep 24 18:18:17 2012
Hex dump of (file 17, block 669888) in trace file xxxxxxxxxx.trc
Corrupt block relative dba: 0x044a38c0 (file 17, block 669888)
Bad check value found during buffer read
Data in bad block:
type: 6 format: 2 rdba: 0x044a38c0
last change scn: 0x0000.14eb5309 seq: 0x1 flg: 0x04
spare1: 0x0 spare2: 0x0 spare3: 0x0
consistency value in tail: 0x53090601
check value in block header: 0x6ea3
computed block checksum: 0x2
Reread of rdba: 0x044a38c0 (file 17, block 669888) found same corrupted data
Mon Sep 24 18:18:19 2012
Corrupt Block Found
TSN = 23, TSNAME = TABLE_TSD1
RFN = 17, BLK = 669888, RDBA = 71973056
OBJN = 86908, OBJD = 86908, OBJECT = SYS_C0040110, SUBOBJECT =
SEGMENT OWNER = SCHEMA1, SEGMENT TYPE = Index Segment
Yesterday, we detected this error because SQL don't execute.
The error repeat 47times and there is 6 different file-block combination (4 index of schemas, 1 of sys and ¡2 tables!)
First, I launched expdp and exp of the one problematic schema. The export was fine, no errors while exporting, but in the alert.log show one block corruption. Should exp and expd show error and stop?
Next, I used dbv and verify all dbfs. Only show 2 blocks error in two datafiles (indexes).
Next, I used RMAN:
A) check database: no error.
B) validate database: error in two blocks (logical error) and different from the 6 in alert.log. This two blocks are indexes.
I re-create this two indexes. When i re-create, the block error disappear (not inmediate, suppose that disappear when block was rewrite). Now dbv and rman show no error.
I have read one note about types of error, other about procedures if db is in archivelog/noarchivelog. Also if object is index or table. But I find anything about auto-repair corrupt blocks in Oracle or why now the 6 block error are solved. I don't know if two tables with two block corrupt lost rows or not.
Appreciate any help.
Regards

Hello Fran. Result of query before rebuild problematic INDEXES:
SQL> select * from V$database_block_corruption;
FILE# BLOCK# BLOCKS CORRUPTION_CHANGE# CORRUPTIO
3 98857 1 390928740 LOGICAL
9 48632 1 390325900 LOGICAL
When I ran RMAN first time to check blocks, it filled V$database_block_corruption with two bad blocks. Different from the 6 errors from alert.:
RMAN> backup validate check logical database;
Error backing up file 9, block 48632: logical corruption
Error backing up file 3, block 98857: logical corruption
I extracted index name from each block and I re-created it. Also, I created a temporary table in tablespace's datafile to fill blocks empty. Problem solved. Rman / dbv show no error.
I'm searching for similar experiences and found: Re: Data in bad block
First 6 bad checksum errors in alert.log disappear with any visible problem?
Can I sure that DB is fine if RMAN and DBV show no errors?
Thank you very much
Edited by: user7755509 on 27-sep-2012 5:43

ORA-01578: ORACLE data block corrupted (file # 1, block # 53713)

When i tried to export data from db (Oracle 11g, 64bit on Linux)
Im getting following error
About to export specified users ...
. exporting pre-schema procedural objects and actions
EXP-00008: ORACLE error 604 encountered
ORA-00604: error occurred at recursive SQL level 1
ORA-01578: ORACLE data block corrupted (file # 1, block # 53713)
ORA-01110: data file 1: '/u02/oradata/RSDB1/system01.dbf'
EXP-00083: The previous problem occurred when calling EXFSYS.DBMS_EXPFIL_DEPASEX P.schema_info_exp
EXP-00008: ORACLE error 604 encountered
ORA-00604: error occurred at recursive SQL level 1
ORA-01578: ORACLE data block corrupted (file # 1, block # 55497)
ORA-01110: data file 1: '/u02/oradata/RSDB1/system01.dbf'
EXP-00083: The previous problem occurred when calling SYS.DBMS_CUBE_EXP.schema_i nfo_exp
. exporting foreign function library names for user WB_APP_MANAGER
. exporting PUBLIC type synonyms
EXP-00008: ORACLE error 604 encountered
ORA-00604: error occurred at recursive SQL level 1
ORA-01578: ORACLE data block corrupted (file # 1, block # 44638)
ORA-01110: data file 1: '/u02/oradata/RSDB1/system01.dbf'
EXP-00000: Export terminated unsuccessfully
I donot understand how to solve this issue Please help me to solve this issue..
Thanks

891620 wrote:
When i tried to export data from db (Oracle 11g, 64bit on Linux)
Im getting following error
About to export specified users ...
. exporting pre-schema procedural objects and actions
EXP-00008: ORACLE error 604 encountered
ORA-00604: error occurred at recursive SQL level 1
ORA-01578: ORACLE data block corrupted (file # 1, block # 53713)
ORA-01110: data file 1: '/u02/oradata/RSDB1/system01.dbf'
EXP-00083: The previous problem occurred when calling EXFSYS.DBMS_EXPFIL_DEPASEX P.schema_info_exp
EXP-00008: ORACLE error 604 encountered
ORA-00604: error occurred at recursive SQL level 1
ORA-01578: ORACLE data block corrupted (file # 1, block # 55497)
ORA-01110: data file 1: '/u02/oradata/RSDB1/system01.dbf'
EXP-00083: The previous problem occurred when calling SYS.DBMS_CUBE_EXP.schema_i nfo_exp
. exporting foreign function library names for user WB_APP_MANAGER
. exporting PUBLIC type synonyms
EXP-00008: ORACLE error 604 encountered
ORA-00604: error occurred at recursive SQL level 1
ORA-01578: ORACLE data block corrupted (file # 1, block # 44638)
ORA-01110: data file 1: '/u02/oradata/RSDB1/system01.dbf'
EXP-00000: Export terminated unsuccessfully
I donot understand how to solve this issue Please help me to solve this issue..
Thanksrun dbv against '/u02/oradata/RSDB1/system01.dbf'
& post results back here
dbv
DBVERIFY: Release 11.2.0.1.0 - Production on Fri Oct 14 20:39:11 2011
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
Keyword     Description                    (Default)
FILE        File to Verify                 (NONE)
START       Start Block                    (First Block of File)
END         End Block                      (Last Block of File)
BLOCKSIZE   Logical Block Size             (8192)
LOGFILE     Output Log                     (NONE)
FEEDBACK    Display Progress               (0)
PARFILE     Parameter File                 (NONE)
USERID      Username/Password              (NONE)
SEGMENT_ID Segment ID (tsn.relfile.block) (NONE)
HIGH_SCN    Highest Block SCN To Verify    (NONE)
            (scn_wrap.scn_base OR scn)

Oracle 11g: Block Corruption in SYSAUX File

Hello All,
I am facing Data corruption issue in the SYSAUX file.
We are using Oracle 11G (Microsoft 32 bit) and our system is running in noarchivelog mode.
Following are the errors in the alert log.
e:\sc\sc15.2\databases\oracleconfig\diag\rdbms\enmscsdb\nm45\trace\nm45_p000_5944.trc
Corrupt block relative dba: 0x0088a9f8 (file 2, block 567800)
Fractured block found during buffer read
Data in bad block:
type: 6 format: 2 rdba: 0x0088a9f8
last change scn: 0x0000.0b3bb7c7 seq: 0x1 flg: 0x04
spare1: 0x0 spare2: 0x0 spare3: 0x0
consistency value in tail: 0xc7000601
check value in block header: 0xee6b
computed block checksum: 0x72c6
Reread of rdba: 0x0088a9f8 (file 2, block 567800) found same corrupted data
Thu Jan 22 16:46:44 2009
SMON: Restarting fast_start parallel rollback
SMON: ignoring slave err,downgrading to serial rollback
ORACLE Instance nm45 (pid = 12) - Error 1578 encountered while recovering transaction (9, 11) on object 458.
Errors in file e:\sc\sc15.2\databases\oracleconfig\diag\rdbms\enmscsdb\nm45\trace\nm45_smon_6492.trc:
ORA-01578: ORACLE data block corrupted (file # 2, block # 567800)
ORA-01110: data file 2: 'E:\SC\SC15.2\DATABASES\ORACLECONFIG\SYSAUXNM45.ORA'
Thu Jan 22 16:46:45 2009
Trace dumping is performing id=[cdmp_20090122164645]
Corrupt Block Found
TSN = 1, TSNAME = SYSAUX
RFN = 2, BLK = 567800, RDBA = 8956408
OBJN = 458, OBJD = 458, OBJECT = I_WRI$_OPTSTAT_HH_OBJ_ICOL_ST, SUBOBJECT =
SEGMENT OWNER = SYS, SEGMENT TYPE = Index Segment
Following query indicates the corruption is in index.
SQL> SELECT tablespace_name, segment_type, owner, segment_name FROM dba_extents
WHERE file_id = 2 and 567800 between block_id AND block_id + blocks - 1;
TABLESPACE_NAME SEGMENT_TYPE OWNER
SEGMENT_NAME
SYSAUX INDEX SYS
I_WRI$_OPTSTAT_HH_OBJ_ICOL_ST
==============
DBverify output:
==============
E:\SC\SC15.2\Databases\OracleConfig>dbv file=SYSAUXNM45.ORA blocksize=8192
DBVERIFY: Release 11.1.0.7.0 - Production on Thu Jan 22 16:59:11 2009
Copyright (c) 1982, 2007, Oracle. All rights reserved.
DBVERIFY - Verification starting : FILE = E:\SC\SC15.2\Databases\OracleConfig/SY
SAUXNM45.ORA
DBV-00200: Block, DBA 8956312, already marked corrupt
Page 567800 is influx - most likely media corrupt
Corrupt block relative dba: 0x0088a9f8 (file 2, block 567800)
Fractured block found during dbv:
Data in bad block:
type: 6 format: 2 rdba: 0x0088a9f8
last change scn: 0x0000.0b3bb7c7 seq: 0x1 flg: 0x04
spare1: 0x0 spare2: 0x0 spare3: 0x0
consistency value in tail: 0xc7000601
check value in block header: 0xee6b
computed block checksum: 0x72c6
DBVERIFY - Verification complete
Total Pages Examined : 1623864
Total Pages Processed (Data) : 540984
Total Pages Failing (Data) : 0
Total Pages Processed (Index): 964944
Total Pages Failing (Index): 0
Total Pages Processed (Other): 17849
Total Pages Processed (Seg) : 0
Total Pages Failing (Seg) : 0
Total Pages Empty : 100086
Total Pages Marked Corrupt : 2
Total Pages Influx : 1
Total Pages Encrypted : 0
Highest block SCN : 190789648 (0.190789648)
SQL> select * from v$database_block_corruption;
FILE# BLOCK# BLOCKS CORRUPTION_CHANGE# CORRUPTIO
2 567800 1 0 FRACTURED
2 567704 1 0 FRACTURED
How to resolve this issue.
Thanks
With Regards
Hemant Joshi.

Drop and re-creating the index would be better than re-building the index.
Check the metalink note: Identify the corruption extension using RMAN/DBV/ANALYZE etc - 836658.1
Note 28814.1 - Handling Oracle Block Corruptions in Oracle7/8/8i/9i/10g
Note 472231.1 - How to identify all the Corrupted Objects in the Database reported by RMAN
ORA-1578 Main Reference Index for Solutions -830997.1

BLOCK CORRUPTION (ORA-1578) 처리 (ORACLE 8I NEW FEATURE)

제품 : ORACLE SERVER
작성날짜 : 2002-05-31
BLOCK CORRUPTION (ORA-1578) 처리 (ORACLE 8I NEW FEATURE)
========================================================
PURPOSE
Block Corruption의 처리 방안에 대해 알아본다.
Problem Description
block corruption 시 10210, 10211,10231 의 event 를 사용해서
해당 block 을 skip 할 수도 있지만 V8.1 이상에서는
dbms_repair.fix_corrupt_blocks ,
dbms_repair.skip_corrupt_block 를 이용하여
corrupt가 발생한 block을 detect하고 skip, 또는 repair해주는 방안이
제시되고 있다.
Workaround
Solution Description
- 먼저 detecting 을 위해 db_block_checking =true 를 init.ora 에 set
- dbms_repair 의 package 를 사용하는데 이 package 는 dbmsrpr.sql,
prvtrpr.plb를 수행한다 .
- sys 로 접속하여 package 를 실행한다.
다음의 예제를 살펴보자
T1 테이블에 corrupt 된 block 이 있다고 가정한다.
SQL> desc t1
Name Null? Type
COL1 NOT NULL NUMBER(38)
COL2 CHAR(512)
SQL> analyze table t1 validate structure;
analyze table t1 validate structure
ERROR at line 1:
ORA-01498: block check failure - see trace file
이때 ANALYZE로 부터 발생된 trace file 에 corrupt 된 block 에 3 row 의
(nrows = 3) data 가 있음을 알수 있다고 가정하자.
DBMS_REPAIR.ADMIN_TABLES (repair and orphan key)
================================================
ADMIN_TABLES 은 table 을 위한 repair table과,인덱스를 위한 orphan key
tables을 제공한다.
SQL> @adminCreate
SQL> connect sys/change_on_install
Connected.
SQL>
SQL> -- Repair Table
SQL>
SQL> declare
2 begin
3 -- Create repair table
4 dbms_repair.admin_tables (
5 -- table_name => 'REPAIR_TABLE',
6 table_type => dbms_repair.repair_table,
7 action => dbms_repair.create_action,
8 tablespace => 'USERS'); -- default TS of SYS if not specified
9 end;
10 /
PL/SQL procedure successfully completed.
SQL> select owner, object_name, object_type
2 from dba_objects
3 where object_name like '%REPAIR_TABLE';
OWNER OBJECT_NAME OBJECT_TYPE
SYS DBA_REPAIR_TABLE VIEW
SYS REPAIR_TABLE TABLE
SQL>
SQL> -- Orphan Key Table
SQL>
SQL> declare
2 begin
3 -- Create orphan key table
4 dbms_repair.admin_tables (
5 table_type => dbms_repair.orphan_table,
6 action => dbms_repair.create_action,
7 tablespace => 'USERS'); -- default TS of SYS if not specified
8 end;
9 /
PL/SQL procedure successfully completed.
SQL> select owner, object_name, object_type
2 from dba_objects
3 where object_name like '%ORPHAN_KEY_TABLE';
OWNER OBJECT_NAME OBJECT_TYPE
SYS DBA_ORPHAN_KEY_TABLE VIEW
SYS ORPHAN_KEY_TABLE TABLE
DBMS_REPAIR.CHECK_OBJECT
=========================
CHECK_OBJECT procedure 는 기술된 object를 check 하고, repair 를 위한 정보를 수집하기 위함이다.
SQL> @checkObject
SQL> set serveroutput on
SQL>
SQL> declare
2 rpr_count int;
3 begin
4 rpr_count := 0;
5 dbms_repair.check_object (
6 schema_name => 'SYSTEM',
7 object_name => 'T1',
8 repair_table_name => 'REPAIR_TABLE',
9 corrupt_count => rpr_count);
10 dbms_output.put_line('repair count: ' || to_char(rpr_count));
11 end;
12 /
repair count: 1
PL/SQL procedure successfully completed.
SQL> desc repair_table
Name Null? Type
OBJECT_ID NOT NULL NUMBER
TABLESPACE_ID NOT NULL NUMBER
RELATIVE_FILE_ID NOT NULL NUMBER
BLOCK_ID NOT NULL NUMBER
CORRUPT_TYPE NOT NULL NUMBER
SCHEMA_NAME NOT NULL VARCHAR2(30)
OBJECT_NAME NOT NULL VARCHAR2(30)
BASEOBJECT_NAME VARCHAR2(30)
PARTITION_NAME VARCHAR2(30)
CORRUPT_DESCRIPTION VARCHAR2(2000)
REPAIR_DESCRIPTION VARCHAR2(200)
MARKED_CORRUPT NOT NULL VARCHAR2(10)
CHECK_TIMESTAMP NOT NULL DATE
FIX_TIMESTAMP DATE
REFORMAT_TIMESTAMP DATE
SQL> select object_name, block_id, corrupt_type, marked_corrupt,
2 corrupt_description, repair_description
3 from repair_table;
OBJECT_NAME BLOCK_ID CORRUPT_TYPE MARKED_COR
CORRUPT_DESCRIPTION
REPAIR_DESCRIPTION
T1 3 1 FALSE
kdbchk: row locked by non-existent transaction
table=0 slot=0
lockid=32 ktbbhitc=1
mark block software corrupt
Data Extraction
===============
repair table에 의하면 file 6 ,block 3 에 corrupt 이 났음을 알수 있다
그러나 아직 이 block 은 corrupt 로 mark 되어 있지 않으므로 필요 data 를
추출하여야 한다.
1. ALTER SYSTEM DUMP (nrows = 3) 에 의해 block안에 있는 row수를 결정한다.
2. corrupt object를 select 하여 가능한 정보를 추출한다.
SQL> -- The following query can be used to salvage data from a corrupt block.
SQL> -- Creating a temporary table facilitates data insertion.
SQL> create table temp_t1 as
2 select * from system.t1
3 where dbms_rowid.rowid_block_number(rowid) = 3
4 and dbms_rowid.rowid_to_absolute_fno (rowid, 'SYSTEM','T1') = 6;
Table created.
SQL> select col1 from temp_t1;
COL1
2
3
DBMS_REPAIR.FIX_CORRUPT_BLOCKS (ORA-1578)
============================================
FIX_CORRUPT_BLOCKS procedure는 repair table 의 정보를 이용하여 corrupt
blocks 을 fix 한다
그러나 아직 full table scan 시 여전히 error 가 발생한다
SQL> declare
2 fix_count int;
3 begin
4 fix_count := 0;
5 dbms_repair.fix_corrupt_blocks (
6 schema_name => 'SYSTEM',
7 object_name => 'T1',
8 object_type => dbms_repair.table_object,
9 repair_table_name => 'REPAIR_TABLE',
10 fix_count => fix_count);
11 dbms_output.put_line('fix count: ' || to_char(fix_count));
12 end;
13 /
fix count: 1
PL/SQL procedure successfully completed.
SQL> select object_name, block_id, marked_corrupt
2 from repair_table;
OBJECT_NAME BLOCK_ID MARKED_COR
T1 3 TRUE
SQL> select * from system.t1;
select * from system.t1
ERROR at line 1:
ORA-01578: ORACLE data block corrupted (file # 6, block # 3)
ORA-01110: data file 6: '/tmp/ts_corrupt.dbf'
DBMS_REPAIR.DUMP_ORPHAN_KEYS
==============================
DUMP_ORPHAN_KEYS는 corrupt data 에 해당하는 index 를 나타내 준다
SQL> select index_name from dba_indexes
2 where table_name in (select distinct object_name from repair_table);
INDEX_NAME
T1_PK
SQL> @dumpOrphanKeys
SQL> set serveroutput on
SQL>
SQL> declare
2 key_count int;
3 begin
4 key_count := 0;
5 dbms_repair.dump_orphan_keys (
6 schema_name => 'SYSTEM',
7 object_name => 'T1_PK',
8 object_type => dbms_repair.index_object,
9 repair_table_name => 'REPAIR_TABLE',
10 orphan_table_name => 'ORPHAN_KEY_TABLE',
11 key_count => key_count);
12 dbms_output.put_line('orphan key count: ' || to_char(key_count));
13 end;
14 /
orphan key count: 3
PL/SQL procedure successfully completed.
SQL> desc orphan_key_table
Name Null? Type
SCHEMA_NAME NOT NULL VARCHAR2(30)
INDEX_NAME NOT NULL VARCHAR2(30)
IPART_NAME VARCHAR2(30)
INDEX_ID NOT NULL NUMBER
TABLE_NAME NOT NULL VARCHAR2(30)
PART_NAME VARCHAR2(30)
TABLE_ID NOT NULL NUMBER
KEYROWID NOT NULL ROWID
KEY NOT NULL ROWID
DUMP_TIMESTAMP NOT NULL DATE
SQL> select index_name, count(*) from orphan_key_table
2 group by index_name;
INDEX_NAME COUNT(*)
T1_PK 3
Note: orphan key table의 index 는 다시 rebuild 되어야 한다.
DBMS_REPAIR.SKIP_CORRUPT_BLOCKS
===============================
SKIP_CORRUPT_BLOCKS 은 table 과 index 의 corrupt block 을 skip 하는 것을 enable/disable 을 실시한다.
Suggestion: SKIP_CORRUPT_BLOCKS 가 enabled되면 orphan key table의 모든
index 는 모두 rebuild 되어야 한다. ( all index associated with object
if DUMP_ORPHAN_KEYS was omitted).
SQL> @skipCorruptBlocks
SQL> declare
2 begin
3 dbms_repair.skip_corrupt_blocks (
4 schema_name => 'SYSTEM',
5 object_name => 'T1',
6 object_type => dbms_repair.table_object,
7 flags => dbms_repair.skip_flag);
8 end;
9 /
PL/SQL procedure successfully completed.
SQL> select table_name, skip_corrupt from dba_tables
2 where table_name = 'T1';
TABLE_NAME SKIP_COR
T1 ENABLED
SQL> -- rows in corrupt block skipped, no errors on full table scan
SQL> select * from system.t1;
COL1 COL2
4 dddd
5 eeee
--> Notice the pk index has not yet been corrected.
SQL> insert into system.t1 values (1,'aaaa');
insert into system.t1 values (1,'aaaa')
SQL> select * from system.t1 where col1 = 1;
no rows selected
DBMS_REPAIR.REBUILD_FREELISTS
===============================
REBUILD_FREELISTS rebuilds freelists for the specified object.
SQL> declare
2 begin
3 dbms_repair.rebuild_freelists (
4 schema_name => 'SYSTEM',
5 object_name => 'T1',
6 object_type => dbms_repair.table_object);
7 end;
8 /
PL/SQL procedure successfully completed.
Rebuild Index
=============
Note: Every index identified in the orphan key table should be rebuilt to
ensure consistent results.
SQL> alter index system.t1_pk rebuild online;
Index altered.
SQL> insert into system.t1 values (1, 'aaaa');
1 row created.
SQL> select * from system.t1;
COL1 COL2
4 dddd
5 eeee
1 aaaa
Reference Document
------------------

Try look to alert<SID>.log file for full error report (you could paste it here).
Also from alert log you could get real values for db_block_buffers and shared_pool_size parameters that used during instance startup.

Help on block corruption (URGENT ...!)

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 ...!

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

Checking block corruption, why in alert it is saying Error in trace file

Hi,
I am using Oracle 10g 10.2.0.1 with linux 32 bit
I wanted to check block corruption using RMAN by following statement
backup validate check logical database;
when i executed the statement, following was the output
Starting backup at 09-MAY-08
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=91 devtype=DISK
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
input datafile fno=00004 name=/u01/app/oracle/oradata/test/users01.dbf
input datafile fno=00008 name=/u01/app/oracle/oradata/test/workflowuser
input datafile fno=00001 name=/u01/app/oracle/oradata/test/system01.dbf
input datafile fno=00003 name=/u01/app/oracle/oradata/test/sysaux01.dbf
input datafile fno=00010 name=/u01/app/oracle/oradata/test/ifan
input datafile fno=00002 name=/u01/app/oracle/oradata/test/undotbs01.dbf
input datafile fno=00007 name=/u01/app/oracle/oradata/test/taker
input datafile fno=00009 name=/u01/app/oracle/oradata/test/testing1
input datafile fno=00005 name=/u01/app/oracle/oradata/test/brokerdb
input datafile fno=00006 name=/u01/app/oracle/oradata/test/moneio
input datafile fno=00011 name=/u01/app/oracle/oradata/test/web1
input datafile fno=00012 name=/u01/app/oracle/oradata/test/e1
input datafile fno=00013 name=/u01/app/oracle/oradata/test/ind1
channel ORA_DISK_1: backup set complete, elapsed time: 00:06:57
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
including current control file in backupset
including current SPFILE in backupset
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:02
Finished backup at 09-MAY-08
and when i do the following query
select * from v$database_block_corruption in sqlplus
then there was no row
so it means there is no logical corruption, but when i am looking at alert log file it is giving following lines
Fri May 9 10:14:04 2008
Errors in file /u01/app/oracle/admin/test/udump/test_ora_6606.trc:
Fri May 9 10:14:04 2008
Errors in file /u01/app/oracle/admin/test/udump/test_ora_6606.trc:
Fri May 9 10:14:04 2008
Errors in file /u01/app/oracle/admin/test/udump/test_ora_6606.trc
and in above trace file following contents
/u01/app/oracle/admin/test4/udump/test_ora_6606.trc
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
ORACLE_HOME = /u01/app/oracle/product/10.2.0/db_1
System name: Linux
Node name: test
Release: 2.6.18-5-686
Version: #1 SMP Wed Oct 3 00:12:50 UTC 2007
Machine: i686
Instance name: test
Redo thread mounted by this instance: 1
Oracle process number: 61
Unix process pid: 6606, image: oracle@test (TNS V1-V3)
*** 2008-05-09 10:14:04.093
*** ACTION NAME:(0000040 STARTED19) 2008-05-09 10:14:04.071
*** MODULE NAME:(backup full datafile) 2008-05-09 10:14:04.071
*** SERVICE NAME:(SYS$USERS) 2008-05-09 10:14:04.071
*** SESSION ID:(91.40318) 2008-05-09 10:14:04.071
Is it normal, why the in alert file it is saying that Error in.
And it did not create any backupset in folder of flash recovery but in Enterprise manager it is showing last backup on 09-may-2008, why ?
Regards,

See logical corruption is normally termed as the internal inconsistancy within the block which is not caused by Oracle but by the user.So if you find internal inconsistancy than the best option is to look at the user and ask him to get the values sorted out.If the internal inconsistancy is some thig like index fragmentation sort of things or index entry pointing to a null rowid than they are termed as the logical corruption and they should not impact your normal as he data is already there and there is no issue in reading the block as such.
The term "corrupted blocks" I would call both in the tables and backup for those data blocks which are unreadable by Oracle which actualy is Physical corruption.
If i am doing the checking at 2:00 am, does it take more than two hours.I didnt understand this.
what can we do for Physical corruptionThis will need the block to be recovered with the Block Recover command of RMAN and a good backup.Read about it here,
http://download.oracle.com/docs/cd/B19306_01/backup.102/b14194/rcmsynta010.htm
About the Logical and Physical corruption checks , check here
http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b14191/rcmconc1012.htm
Aman....

System and sysaux file block corruption

Errors in file /u01/app/oracle/diag/rdbms/pdent/pdent/trace/pdent_smon_3135.trc:
ORA-00604: error occurred at recursive SQL level 1
ORA-01578: ORACLE data block corrupted (file # 1, block # 91607)
ORA-01110: data file 1: '/u01/app/oracle/oradata/pdent/system01.dbf'
I am unable to take r man backup, as well as export using datapump. i tried to recover it using rman blockrecover but still same. here is detail
SQL> SELECT * FROM V$DATABASE_BLOCK_CORRUPTION;
FILE# BLOCK# BLOCKS CORRUPTION_CHANGE# CORRUPTIO
1 91607 1 0 CHECKSUM
2 58710 1 0 CHECKSUM
5 1202316 1 0 CHECKSUM
SQL> SELECT
tablespace_name,
segment_type,
owner,
segment_name
FROM dba_extents
WHERE file_id = 1
AND BETWEEN block_id AND block_id + blocks - 1; 2 3 4 5 6 7 8
TABLESPACE_NAME SEGMENT_TYPE OWNER
SEGMENT_NAME
SYSTEM INDEX SYS
I_OBJ2
alter system dump datafile 1 block 344;
SQL> SELECT
tablespace_name,
segment_type,
owner,
segment_name
FROM dba_extents
WHERE file_id = 2
AND 58710 BETWEEN block_id AND block_id + blocks - 1; 2 3 4 5 6 7 8
TABLESPACE_NAME SEGMENT_TYPE OWNER
SEGMENT_NAME
SYSAUX INDEX PARTITION SYS
WRH$_OSSTAT_PK
SQL> ALTER INDEX I_OBJ2 REBUILD ONLINE;
ALTER INDEX I_OBJ2 REBUILD ONLINE
ERROR at line 1:
ORA-00701: object necessary for warmstarting database cannot be altered
need immediate help.
thanks in advance

user11914238 wrote:
Errors in file /u01/app/oracle/diag/rdbms/pdent/pdent/trace/pdent_smon_3135.trc:
ORA-00604: error occurred at recursive SQL level 1
ORA-01578: ORACLE data block corrupted (file # 1, block # 91607)
ORA-01110: data file 1: '/u01/app/oracle/oradata/pdent/system01.dbf'
I am unable to take r man backup, as well as export using datapump. i tried to recover it using rman blockrecover but still same. here is detail
SQL> SELECT * FROM V$DATABASE_BLOCK_CORRUPTION;
FILE# BLOCK# BLOCKS CORRUPTION_CHANGE# CORRUPTIO
1 91607 1 0 CHECKSUM
2 58710 1 0 CHECKSUM
5 1202316 1 0 CHECKSUM
SQL> SELECT
tablespace_name,
segment_type,
owner,
segment_name
FROM dba_extents
WHERE file_id = 1
AND BETWEEN block_id AND block_id + blocks - 1; 2 3 4 5 6 7 8
TABLESPACE_NAME SEGMENT_TYPE OWNER
SEGMENT_NAME
SYSTEM INDEX SYS
I_OBJ2
alter system dump datafile 1 block 344;
SQL> SELECT
tablespace_name,
segment_type,
owner,
segment_name
FROM dba_extents
WHERE file_id = 2
AND 58710 BETWEEN block_id AND block_id + blocks - 1; 2 3 4 5 6 7 8
TABLESPACE_NAME SEGMENT_TYPE OWNER
SEGMENT_NAME
SYSAUX INDEX PARTITION SYS
WRH$_OSSTAT_PK
SQL> ALTER INDEX I_OBJ2 REBUILD ONLINE;
ALTER INDEX I_OBJ2 REBUILD ONLINE
ERROR at line 1:
ORA-00701: object necessary for warmstarting database cannot be altered
need immediate help.
Immediate help can be only provided by Oracle Support Services. So if you need that, please raise a Sev1 SR . For your issue, as others have suggested already, if you have a valid backup and you are in the archive log mode, using RMAN's BMR(Block Media Recovery) , the issue can be resolved provided there is nothing wrong with the hardware of yours. If that's the case, recovery wouldn't yield any benefits.
Aman....

Data Block Corruption in sysaux01

dear all,
analyze table SYSMAN.MGMT_METRICS_RAW validate structure cascade ;
ORA-01578: ORACLE data block corrupted (file # 3, block # 31263)
ORA-01110: data file 3: '/u01/app/oracle/oradata/denimlhr/sysaux01.dbf'
We create 'REPAIR_TEST' Table by follwoing comand
begin
dbms_repair.admin_tables(
table_name => 'REPAIR_TEST',
table_type => dbms_repair.repair_table,
action => dbms_repair.create_action,
tablespace => 'SYSAUX'
end;
We execute the following quey
declare corr_count binary_integer;
begin
corr_count := 0;
dbms_repair.CHECK_OBJECT (
schema_name => 'SYSMAN',
object_name => 'MGMT_METRICS_RAW',
partition_name => null,
object_type => dbms_repair.table_object,
repair_table_name => 'REPAIR_TEST',
flags => null,
relative_fno => null,
block_start => null,
block_end => null,
corrupt_count => corr_count
dbms_output.put_line(to_char(corr_count));
end;
NOW THE FOLLOWING ERROR IS Occuring .
ORA-24123: feature IOT support is not yet implemented
ORA-06512: at "SYS.DBMS_REPAIR", line 293
ORA-06512: at line 6
please Advise
Regards/Waseem

What's your db version?
Which error now you want to track ?The block corruption one or the one which is in bold?
IF the one wich is in bold is the issue than here is what Oracle says about it,
ORA-24123:     feature string is not yet implemented
Cause:     An attempt was made to use the specified feature, but the feature is not yet implemented.
Action:     Do not attempt to use the feature.
Aman....

Block Corruption in SYSTEM Tablespace

Hi,
well it´s just a test database without a backup, but i would like to repair it anyway :-)
Here are the facts:
Errors in file c:\oracle\admin\o10g\bdump\o10g_smon_1404.trc:
ORA-01578: ORACLE data block corrupted (file # 1, block # 50187)
ORA-01110: data file 1: 'C:\ORACLE\ORADATA\O10G\SYSTEM01.DBF'
1. I found the object: It´s a Cluster named SYS.C_TOID_VERSION#
containing a lot of table stuff (type$,parameter$, ...)
i tried to repair it with dbms_repair:
BEGIN SYS.DBMS_REPAIR.SKIP_CORRUPT_BLOCKS (
SCHEMA_NAME => 'SYS',
OBJECT_NAME => 'C_TOID_VERSION#',
OBJECT_TYPE => dbms_repair.cluster_object,
FLAGS => dbms_repair.skip_flag);
END;
No error, but the same block corruption message in the alert.log 1 minute later.
i can select the tables in the cluster.
Has anyboby another trick to repair a cluster?
Thanks
Marco

Hi,
if you have rman backup then this problem become resolved by only one command.
BLOCKRECOVER DATAFILE 1 BLOCK 3 DATAFILE 50187;
otherwise restore system tablespace from backup and recover it.
and one more thing
**Don't fix the block in system tablespace it may create problem if that block contain some useful information of oracle(internal information).
Thanks
Kuljeet Pal Singh

Block Corruption (BR0398E DBVERIFY detected corrupted blocks in /oracle/TS2

Hello Gurus
I am facing Data Block corruption error for single datafile....
BR0278W Command output of '/oracle/TS2/102_64/bin/dbv file=/oracle/TS2/sapdata3/ts2_73/ts2.data73 blocksize=8192':
DBVERIFY: Release 10.2.0.2.0 - Production on Thu Jul 17 23:31:25 2008
Copyright (c) 1982, 2005, Oracle. All rights reserved.
DBVERIFY - Verification starting : FILE = /oracle/TS2/sapdata3/ts2_73/ts2.data73
Block Checking: DBA = 528925394, Block Type = KTB-managed data block
row 4: key out of order
     end index block validation
Page 443090 failed with check code 6401
DBVERIFY - Verification complete
Total Pages Examined         : 1280000
Total Pages Processed (Data) : 248379
Total Pages Failing   (Data) : 0
Total Pages Processed (Index): 180541
Total Pages Failing   (Index): 1
Total Pages Processed (Other): 13272
Total Pages Processed (Seg) : 0
Total Pages Failing   (Seg) : 0
Total Pages Empty            : 837808
Total Pages Marked Corrupt   : 0
Total Pages Influx           : 0
Highest block SCN            : 65006255 (0.65006255)
BR0398E DBVERIFY detected corrupted blocks in /oracle/TS2/sapdata3/ts2_73/ts2.data73
appriciated help please..
Regards
Giridhar.

Dump file /oracle/TS2/saptrace/usertrace/ts2_ora_23103.trc
Oracle Database 10g Enterprise Edition Release 10.2.0.2.0 - 64bit Production
With the Partitioning and Data Mining options
ORACLE_HOME = /oracle/TS2/102_64
System name:    SunOS
Node name:      sassad25
Release:        5.10
Version:        Generic_120011-14
Machine:        sun4u
Instance name: TS2
Redo thread mounted by this instance: 1
Oracle process number: 53
Unix process pid: 23103, image: oracle@sassad25 (TNS V1-V3)
2008-07-18 13:48:40.486
SERVICE NAME:(SYS$USERS) 2008-07-18 13:48:40.484
SESSION ID:(925.20292) 2008-07-18 13:48:40.484
Block Checking: DBA = 528925394, Block Type = KTB-managed data block
row 4: key out of order
end index block validation
for block 0x1f86c2d2
Block header dump: 0x1f86c2d2
Object id on Block? Y
seg/obj: 0x2c6f0 csc: 0x00.3f418d9 itc: 2 flg: E typ: 2 - INDEX
     brn: 0 bdba: 0x1f86c00b ver: 0x01 opc: 0
     inc: 0 exflg: 0
Itl           Xid                  Uba         Flag Lck        Scn/Fsc
0x01   0x0000.000.00000000 0x00000000.0000.00 -
    0 fsc 0x0000.00000000
0x02   0x0002.008.00002cb6 0x02475283.0359.19 --U-    2 fsc 0x0000.03f418ee
Leaf block dump
===============
header address 17494483044=0x412c0a064
kdxcolev 0
KDXCOLEV Flags = - - -
kdxcolok 0
kdxcoopc 0x80: opcode=0: iot flags=--- is converted=Y
kdxconco 7
kdxcosdc 0
kdxconro 174
kdxcofbo 384=0x180
kdxcofeo 967=0x3c7
kdxcoavs 583
kdxlespl 0
kdxlenxt 528925395=0x1f86c2d3
kdxleprv 528925393=0x1f86c2d1
kdxledsz 6
kdxlebksz 8032
row#0[7990] flag: -
, lock: 0, len=42, data:(6): 1b ce 75 c6 00 15
col 0; len 3; (3): 30 31 35
col 1; len 2; (2): 58 58
col 2; len 8; (8): 46 4f 4e 54 52 45 50 4c
col 3; len 9; (9): 48 50 4c 4a 31 31 30 30 69
col 4; len 3; (3): 34 36 43
col 5; len 1; (1): 44
col 6; len 1; (1): 80
row#1[7952] flag: -
, lock: 0, len=38, data:(6): 1c 46 88 34 00 0e
col 0; len 3; (3): 30 31 35
col 1; len 2; (2): 58 58
col 2; len 8; (8): 46 4f 4e 54 52 45 50 4c
col 3; len 5; (5): 48 50 4c 4a 34
col 4; len 3; (3): 34 36 43
col 5; len 1; (1): 44
col 6; len 1; (1): 80
row#2[7913] flag: -
, lock: 0, len=39, data:(6): 1b 8f 2b bd 00 03
col 0; len 3; (3): 30 31 35
col 1; len 2; (2): 58 58
col 2; len 8; (8): 46 4f 4e 54 52 45 50 4c
col 3; len 6; (6): 48 50 4c 4a 34 30
col 4; len 3; (3): 34 36 43
col 5; len 1; (1): 44
col 6; len 1; (1): 80
row#3[7871] flag: -
, lock: 0, len=42, data:(6): 20 03 18 b1 00 0a
col 0; len 3; (3): 30 31 35
col 1; len 2; (2): 58 58
col 2; len 8; (8): 46 4f 4e 54 52 45 50 4c
col 3; len 9; (9): 48 50 4c 4a 34 30 30 30 00
col 4; len 3; (3): 34 36 43
col 5; len 1; (1): 44
col 6; len 1; (1): 80
row#4[7830] flag: -
, lock: 0, len=41, data:(6): 1b 4f 19 ef 00 0b
col 0; len 3; (3): 30 31 35
col 1; len 2; (2): 58 58
col 2; len 8; (8): 46 4f 4e 54 52 45 50 4c
col 3; len 8; (8): 48 50 4c 4a 34 30 30 30
col 4; len 3; (3): 34 36 43
col 5; len 1; (1): 44
col 6; len 1; (1): 80
row#5[7788] flag: -
, lock: 0, len=42, data:(6): 21 03 15 12 00 02
col 1; len 2; (2): 58 58
col 2; len 8; (8): 46 4f 4e 54 52 45 50 4c
col 3; len 9; (9): 48 50 4c 4a 34 30 30 30 31
col 4; len 3; (3): 34 36 43
col 5; len 1; (1): 44
col 6; len 1; (1): 80
row#6[7746] flag: -
, lock: 0, len=42, data:(6): 1c 86 83 6a 00 0c
col 0; len 3; (3): 30 31 35
col 1; len 2; (2): 58 58
col 2; len 8; (8): 46 4f 4e 54 52 45 50 4c
col 3; len 9; (9): 48 50 4c 4a 34 30 30 30 37
col 4; len 3; (3): 34 36 43
col 5; len 1; (1): 44
col 6; len 1; (1): 80
row#7[7704] flag: -
, lock: 0, len=42, data:(6): 1b 4f 19 0f 00 02
col 0; len 3; (3): 30 31 35
col 1; len 2; (2): 58 58
col 2; len 8; (8): 46 4f 4e 54 52 45 50 4c
col 3; len 9; (9): 48 50 4c 4a 34 30 30 30 44
col 4; len 3; (3): 34 36 43
col 5; len 1; (1): 44
col 6; len 1; (1): 80
row#8[7662] flag: -
, lock: 0, len=42, data:(6): 1f 03 50 f5 00 03
col 0; len 3; (3): 30 31 35
col 1; len 2; (2): 58 58
col 2; len 8; (8): 46 4f 4e 54 52 45 50 4c
col 3; len 9; (9): 48 50 4c 4a 34 30 30 30 44
col 4; len 3; (3): 37 30 30
col 5; len 1; (1): 44
col 6; len 1; (1): 80
row#9[7619] flag: -
, lock: 0, len=43, data:(6): 1f 03 50 f5 00 04
col 0; len 3; (3): 30 31 35
col 1; len 2; (2): 58 58
col 2; len 8; (8): 46 4f 4e 54 52 45 50 4c
col 3; len 9; (9): 48 50 4c 4a 34 30 30 30 44
col 4; len 3; (3): 37 30 30
col 5; len 1; (1): 44
col 6; len 2; (2): c1 02
row#10[7577] flag: -
, lock: 0, len=42, data:(6): 1f 43 21 d1 00 09
col 0; len 3; (3): 30 31 35
col 1; len 2; (2): 58 58
col 2; len 8; (8): 46 4f 4e 54 52 45 50 4c
col 3; len 9; (9): 48 50 4c 4a 34 30 30 30 45
col 4; len 3; (3): 34 36 43
col 5; len 1; (1): 44

Import sys schema

hi
im using oracle 9i on windows ...i export the sys schema....
i want to import to another database..
my queston is that before import to another database...can we create user or tablespace of old database. in new database....

robinkhan wrote:
hi
im using oracle 9i on windows ...i export the sys schema....
i want to import to another database..
my queston is that before import to another database...can we create user or tablespace of old database. in new database....And why do you want to import SYS schema to another database? You cann't do it. DON'T try to do it. Or you'll corrupt your database! SYS schema containts all information about your database so DON'T play with it!

Block corruption error keep on repeating in alert log file

Hi,
Oracle version : 9.2.0.8.0
os : sun soalris
error in alert log file:
Errors in file /u01/app/oracle/admin/qtrain/bdump/qtrain_smon_24925.trc:
ORA-00604: error occurred at recursive SQL level 1
ORA-01578: ORACLE data block corrupted (file # 1, block # 19750)
ORA-01110: data file 1: '/u01/app/oracle/admin/qtrain/dbfiles/system.dbf'system datafile is restored from backup still the error is logged in alert log file
Inputs are appreciated.
Thanks
Prakash

Hi,
Thanks for the inputs
OWNER                          SEGMENT_NAME                                                                      PARTITION_NAME                 SEGMENT_TYPE       TABLESPACE_NAME                 EXTENT_ID    FILE_ID   BLOCK_ID      BYTES     BLOCKS RELATIVE_FNO
SYS                            SMON_SCN_TO_TIME                                                                                                 CLUSTER            SYSTEM                                  1          1      19749      16384          1            1
SYS                            SMON_SCN_TO_TIME                                                                                                 CLUSTER            SYSTEM                                  2          1      19750      32768          2            1Thanks
Prakash

System block corrupted

Hi,
Database version: 10.2.0
OS: Linux 5.4
in my test databae One of the system datafile block is corrupted.
I dont have rman backup for that test db.
EXP-00008: ORACLE error 1578 encountered
ORA-01578: ORACLE data block corrupted (file # 1, block # 50305)
ORA-01110: data file 1: '/u01/app/oracle/oradata/rmct/system01.dbf'
EXP-00000: Export terminated unsuccessfully
I cannot recover that block. At least I want to take export of the schema which resides in non
system tablespace.
regards,

What is the mode of your database.
SQL> select log_mode from v$database ;
If it is running in ARCHIVELOG, then you should be able to recover the corrupted block using RMAN
Guide on how to do that using RMAN can be found at ..
http://download.oracle.com/docs/cd/B12037_01/server.101/b10734/rcmconc2.htm#1006446
You can also read the forum
block level recovery
If the database is running in NOARCH. then I am not sure but you have to repair the block before you can run import. You can use the DBMS_REPAIR package
Refer the link for DBMS_REPAIR package details:
http://download.oracle.com/docs/cd/B19306_01/server.102/b14231/repair.htm

Block corruption in sys schema

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