Block corruption in UNDO datafile

Hi,
I am getting block corruption problem related to undo datafile on my pre production db.
Alert log says:
Tue Jun 24 17:59:38 2008
Errors in file /oracle/admin/CBOPROD/bdump/cboprod_pmon_2596886.trc:
ORA-01578: ORACLE data block corrupted (file # 2, block # 121)
ORA-01110: data file 2: '/oracle/oradata/CBOPROD/undotbs01.dbf'
Tue Jun 24 17:59:38 2008
Errors in file /oracle/admin/CBOPROD/bdump/cboprod_pmon_2596886.trc:
ORA-01578: ORACLE data block corrupted (file # 2, block # 137)
ORA-01110: data file 2: '/oracle/oradata/CBOPROD/undotbs01.dbf'
Tue Jun 24 17:59:38 2008
Errors in file /oracle/admin/CBOPROD/bdump/cboprod_pmon_2596886.trc:
ORA-01578: ORACLE data block corrupted (file # 2, block # 57)
ORA-01110: data file 2: '/oracle/oradata/CBOPROD/undotbs01.dbf'
Tue Jun 24 17:59:38 2008
Errors in file /oracle/admin/CBOPROD/bdump/cboprod_pmon_2596886.trc:
ORA-01578: ORACLE data block corrupted (file # 2, block # 25)
ORA-01110: data file 2: '/oracle/oradata/CBOPROD/undotbs01.dbf'
Tue Jun 24 17:59:38 2008
Errors in file /oracle/admin/CBOPROD/bdump/cboprod_pmon_2596886.trc:
ORA-01578: ORACLE data block corrupted (file # 2, block # 105)
ORA-01110: data file 2: '/oracle/oradata/CBOPROD/undotbs01.dbf'
Tue Jun 24 17:59:38 2008
Errors in file /oracle/admin/CBOPROD/bdump/cboprod_pmon_2596886.trc:
ORA-01578: ORACLE data block corrupted (file # 2, block # 73)
ORA-01110: data file 2: '/oracle/oradata/CBOPROD/undotbs01.dbf'
Tue Jun 24 17:59:38 2008This issue happend while loading the data into db. I am more worried about data rather than availability as we took a good time move production data.
I have the cold backup of last night using RMAN (at mount stage) and my db is running in Archive log mode.
Please suggest to how to approach in current scnario.
OS: AIX 5.3
Oracle: 10.2.0.3.0
Thanks for your time
Bhupinder

Bhupinder,
The problem here it is your undo tablespace, and you are getting this error, because Oracle is hitting these blocks to use them.
You could try to create a new undo tablespace, but this measure is a bit strange, as obviously you can change the undo tablespace only without current transactions. If you can change the undo tablespace why recover the inactive undo tablespace?
I would probably try to change the undo tablespace, and if that fails there really is no other solution than at least restore the entire undo tablespace. Likely undo is disabled in mount stage so this should work.
Hth
Sybrand Bakker
Senior Oracle DBA

Similar Messages

Re: Block corruption in Undo tablespace

undo_management
string
MANUAL
undo_tablespace
string
UNDOTBS2
SQL> alter database open;
alter database open
ERROR at line 1:
ORA-01092: ORACLE instance terminated. Disconnection forced
ORA-00704: bootstrap process failure
ORA-00604: error occurred at recursive SQL level 2
ORA-00376: file 3 cannot be read at this time
ORA-01110: data file 3: '/u01/app/ora/oradata/undotbs01.dbf'
Process ID: 5099
Session ID: 96 Serial number: 7
Anyone help me pls.

undo_management
string
MANUAL
undo_tablespace
string
UNDOTBS2
SQL> alter database open;
alter database open
ERROR at line 1:
ORA-01092: ORACLE instance terminated. Disconnection forced
ORA-00704: bootstrap process failure
ORA-00604: error occurred at recursive SQL level 2
ORA-00376: file 3 cannot be read at this time
ORA-01110: data file 3: '/u01/app/ora/oradata/undotbs01.dbf'
Process ID: 5099
Session ID: 96 Serial number: 7
Anyone help me pls.

Block corruption in undo_tablespace

due to storage problem my server changed to read only, because of this my database instance gets terminated improperly. after fixing storage issue i started the database it throws error as block corruption. that undo datafile is needed for instance recovery, so i can't able to make it offline.
main thing is my database is in noarchivelog mode.
Please give any solution to open the database except restoring.

https://forums.oracle.com/thread/1098080

Oracle Datafile block corruption

HI all
i am facing datafile block corruption in following datafile .
i don't have any backup.
how i can recover these blocks
Regards
Vivek Rawat

Hi Vivek,
Please refer below SAP notes to analyze the affected objects which needs to be recovered
365481 - Block corruptions
1559652 - How to deal with block corruptions on Oracle
923919 - Advanced Oracle block checking features
http://www.dba-oracle.com/t_repair_corrupt_blocks.htm
Hope this helps.
Regards,
Deepak Kori

Block corruption

Hi,
I used DBV utility to check block corruption in each datafile and it returned no corrupt block. So for redolog files i used the same utility and it given a long list of info which i can't rectify what that means? there is block corruption in redolog files or this something else.
DBVERIFY - Verification starting : FILE = /oracle/BP3/origlogA-New/log_g1m1.log
Page 1 is influx - most likely media corrupt
Corrupt block relative dba: 0x00000001 (file 0, block 1)
Fractured block found during dbv:
Data in bad block:
type: 1 format: 2 rdba: 0x00000001
last change scn: 0x8000.0002b7af seq: 0x5e flg: 0xbd
spare1: 0x0 spare2: 0x0 spare3: 0x0
consistency value in tail: 0x00000000
check value in block header: 0x0
computed block checksum: 0x0
Page 2 is marked corrupt
Corrupt block relative dba: 0x00000002 (file 0, block 2)
Bad header found during dbv:
Data in bad block:
type: 1 format: 2 rdba: 0x00000002
last change scn: 0x8010.0002b7af seq: 0x98 flg: 0x7e
spare1: 0x0 spare2: 0x0 spare3: 0x70
consistency value in tail: 0x00030003
check value in block header: 0x0
computed block checksum: 0x0
Page 3 is marked corrupt
Corrupt block relative dba: 0x00000003 (file 0, block 3)
Bad header found during dbv:
Data in bad block:
type: 1 format: 2 rdba: 0x00000003
last change scn: 0x8010.0002b7af seq: 0x4d flg: 0x21
spare1: 0x0 spare2: 0x0 spare3: 0x3f8
consistency value in tail: 0x41ffffff
check value in block header: 0x0
block checksum disabled
and goes on
Thanks and Regards
Jafar

Hi,
DB Verify
DB_VERIFY (dbv) is a utility than can be used to perform a physical structure integrity check against off-line database files.
This utility runs perfectly well against on-line files as well, however, the manual is clear that it is an off-line utility. My assumption is that it may incorrectly report blocks as bad while I/O is taken place (fractured blocks).
DBA 's should use this utility frequently to identify datafiles that are corrupted. Some times the database will perform normally until you address a particular block in the datafile, which may then result in ORA-600 errors.
DB_VERIFY is useful in these situations:
When block corruption is expected;
Forecast any future problems w.r.t. database file/ block corruption;
When you restore files from a tape. It will help knowing if the first file pulled from tape is corrupt, instead of spending hours to extract all of them.
To access help on DB_VERIFY type:
DSS-BWDB:orabp3 2% dbv help=y
DBVERIFY: Release 10.2.0.2.0 - Production on Fri Feb 8 15:52:02 2008
Copyright (c) 1982, 2005, Oracle. 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)
EXAMPLE
$ dbv file=/u01/oradata/o10gr2/example01.dbf
DBVERIFY: Release 10.2.0.1.0 - Production on Sat Jul 7 11:45:52 2007
Copyright (c) 1982, 2005, Oracle. All rights reserved.
DBVERIFY - Verification starting : FILE = /u01/oradata/o10gr2/example01.dbf
DBVERIFY - Verification complete
Total Pages Examined : 12800
Total Pages Processed (Data) : 4409
Total Pages Failing (Data) : 0
Total Pages Processed (Index): 1264
Total Pages Failing (Index): 0
Total Pages Processed (Other): 1539
Total Pages Processed (Seg) : 0
Total Pages Failing (Seg) : 0
Total Pages Empty : 5588
Total Pages Marked Corrupt : 0
Total Pages Influx : 0
Highest block SCN : 470536 (0.470536)
You can use dbv utility for datafiles not for tempfiles, redolog file, controlfile etc.
download-west.oracle.com/docs/cd/B10501_01/server.920/a96652/ch13.htm
Regards
Jafar

System datafile block corruption - no backups and database in NOARCHIVELOG mode

Dear All,
Database version - oracle 11.1 Enterprise
OS - RHELinux 5.8
What are the options of recovering from physical block corruption when there are no backup available to perform block media recovery?
V$DATABASE_BLOCK_CORRUPTION reports two segments corrupted (please see attached image for details).
1 table in system datafile - sys_fba_barrierscn
1 index - (applicaiton index)
What are my options?
I know there is a possibility that the database will not restart after a shutdown due to corruption in system tablespace.
Database is in noarchivelog mode. So online backups are not possible and there aren't any full backups either.
I am thinking of below,
1. Run dbms_repair with fix_block_corruption. - Still database startup might fail?
2. Shutdown the database and take offline full backup with RMAN MAXCorrupt option.
Appreciate your suggestions and advises.
Thanks
Stefan

Thanks Sybrand,
Agree with your first two suggestions .
Also scheduled a expdp job tonight. (Only backup like thing they had was a expdp cron, but until today all the large tables were failing due to small undo_retention).
Yes. Flashback is not used. So hopefully it will not affect the a database restart i guess?
Related to dbms_repair, I was referring to - http://askdba.org/weblog/2010/08/physical-corruption-ora-1578-part-3/.
Where DBMS_REPAIR.FIX_CORRUPT_BLOCKS and DBMS_REPAIR.SKIP_CORRUPT_BLOCKS used.
Which i think will not use any redo.
Thanks
Stefan

Oracle 11g - How to repair block corruption(on free space) in datafile

Hi,
I have a tablesopace with 3 datafiles, out of which one datafile has corrupted block. But no objects or data is affected as the corrupted block os in free space. This was shown in the alert logs.
Please see below the details:
Wed Apr 06 15:30:04 2011
SMON: Restarting fast_start parallel rollback
SMON: ignoring slave err,downgrading to serial rollback
ORACLE Instance geooap (pid = 12) - Error 1578 encountered while recovering transaction (10, 6) on object 149755.
Errors in file f:\oracle11g\diag\rdbms\geooap\geooap\trace\geooap_smon_5540.trc:
ORA-01578: ORACLE data block corrupted (file # 7, block # 54053)
ORA-01110: data file 7: 'F:\ORACLE11G\ORADATA\GEOOAP\ORDER_DATA_01.DBF'
GEOAP:
Fri Apr 01 14:57:48 2011
Errors in file f:\oracle11g\diag\rdbms\geop\geop\trace\geop_arc1_2156.trc:
ORA-00235: control file read without a lock inconsistent due to concurrent update
Fri Apr 01 14:57:58 2011
================================================================
The corruption is being reported in a free space block of the ORDER_DATA_01.DBF.
I’ve checked all the tables (and indexes) in this tablespace and none report corruption.
=====================================================Is there any action I need to take to remove corruption at this point?It is not affected any operation on the database yet.
What is the best way to do get rid of the corrupt block, without dropping and rebuillding the full tablespace(which is around 6 GB -total of 3 datafiles)
Thanks a lot

Can RMAN recover the datablock from this cold backup(which is a week old, the data file was not corrupted then) ?Please note that to do the recovery, you would need the backup and the archivelog files since the backup. Think about what you are asking to do. Its a single block whose recovery you are asking from a week old backup which obviously would be on an much older SCN compared to the rest of the database. How would you make that block consistent with the rest of the datafile. If you don't have archivelog in that db whose block is corrupted, you may forget that block and any data that it might ever had. Also, please read the documentation about the block recovery which explains the requirements very clearly,
http://download.oracle.com/docs/cd/E11882_01/backup.112/e10642/rcmblock.htm#BRADV89784
From the above link, 1st point,
The target database must run in ARCHIVELOG mode and be open or mounted with a current control file.HTH
Aman....

Block Corruption In Free Space Chuck Of A Datafile

Hi all,
I have run into this issue where both dbv and rman have caught a block corruption on one of the datafiles. When I checked these blocks, they did not belong to any segments and I was able to verify that this block ID falls in the block_id + blocks range in the dba_free_space where file_id = 41.
My questions are ...
- why is rman complaining about a bad block in free space? It will never need to back it up any way?
- According to note 28814.1, this type of corruption can be ignored and if when oracle needs to use this block, it will simply create/rewrite a new image without the corrupted data. Have you been affected by this issue? If yes, what did you do?
Thank you

1. "why is rman complaining about a bad block in free space? It will never need to back it up any way?"
Because it is doing its job.
2. "Have you been affected by this issue? If yes, what did you do?"
In what version? I generally find it helpful to read the docs and check discussions of issues on metalink.

Undo block corruption

Hallo,
I have an ORA-00600 with [4194] which indicates an undo block corruption (as far as I know).
Does anyone know how to deal with this ?
Regards,
Mynz

Hi Mynz,
But how does it help me to go on ?Here are my notes on repairing undo corruption:
http://www.dba-oracle.com/t_fix_undo_log_corruption.htm
I would open an SR and note that there are undocumented parms to help, BUT only when advised by Oracle tech support:
http://www.dba-oracle.com/t_8i_hidden_corruption_recovery_parameters.htm
Hope this helps. . .
Don Burleson
Oracle Press author

System datafile block corrupted

hi there,
i have got a serious problem, my database is in mount state, but when i try to start it up, it gives error datafile block corrupted file 'd:\path\system01.dbf'. these are backup file from last database, afer which os has been formated and reinstalled.
these are files from oracle 9i R1 and i want to install it intom oracle 9i R2.is it ok or i have to install oracle 9i R1 for making database up?
plz help what should i do???
thanks and regards
VD

ya its true,
its not consistent backup.its not RMAN backup.i just have files >DBF,controlfiles and redo log files.
now i am asked to retrieve data from these files.i have rebuild the database, and mounted it.but it is not getting opened.
if i use 'ALTER DATABASE OPEN RESETLOGS' it takes too much time but dosent open.
thats the issue.
SQL> ALTER DATABASE OPEN RESETLOGS;
ALTER DATABASE OPEN RESETLOGS
ERROR at line 1:
ORA-01190: controlfile or data file 2 is from before the last RESETLOGS
ORA-01110: data file 2: 'D:\ORACLE\ORADATA\ORACLE\UNDOTBS01.DBF'
alert log file entry:-
Mon Nov 17 15:59:49 2008
ORA-1589 signalled during: ALTER DATABASE OPEN..
Mon Nov 17 16:00:06 2008
RESETLOGS after incomplete recovery UNTIL CHANGE 81553193
Resetting resetlogs activation ID 0 (0x0)
Mon Nov 17 16:00:21 2008
Errors in file D:\ORACLE\admin\ORACLE\udump\ORA02204.TRC:
ORA-01110: data file 2: 'D:\ORACLE\ORADATA\ORACLE\UNDOTBS01.DBF'
ORA-01114: IO error writing block to file 2 (block # 1)
ORA-27041: unable to open file
OSD-04002: unable to open file
O/S-Error: (OS 5) Access is denied.
Mon Nov 17 16:00:22 2008
now tell me what should i do??
thanks and regards
VD

Data Block Corruption

I'm on 9i R2 Patch 7 on a Microsoft Windows Server 2003.
How do you fix data block corruption in a Table?
Is the some way to retrieve the data from the Table drop it then recreate and reimport the data?
or do you have to succumb with restoring the Database from the last known good backup?

Hey, you can do the BMR (Block Media Recovery).
Since block corruption is to few subsets of blocks, i.e. a single table, you dont need to restore from the previous valid backup, you can simply do the following to achieve BMR.
Connect to rman and run the following:
run{ backup validate database};
Once the above commend is finishes, exit from RMAN and connect to the database as / as sysdba and use the following view to know the details required for BMR.
select * from V$backup_corruption;
The above queries gives you file# and block# information. Once you have the information do the BMR using following command at the RMAN prompt:
run {blockrecover datafile # block #};
# : indicated the datafile number and block number from the above view.
Let me know if you have any further issues.
You can also use view V$DATABASE_BLOCK_CORRUPTION to view the file# and corrupted blocks information.
Jaffar

Finding and fixing block corruption in oracle 10g

10.2.0.5.6
OS: Hp-unix
databases files on RAW.
DB Size: 10 TBs+
We had a SAN outage recently. The DB is back online. We want to check for block corruption to be on the safe side. We are planning to take a SAN EMC BCV copy of prod to run this. Looking for opinioms on the best way.Production is up and running. This is just a sanity check.
We are NOT using RMAN for backups. We do a BCV copy and then back that up and archive logs to tape.
RMAN: Can we do this from the control files? Do we have to set anything up? Is this the best way?
DBMS_REPAIR: I have not used this. We don't even have the package installed. I can install it.
DB_VERIFY: not sure if this is a good option or not. Is this current? I know I'll have to do it file by file and grep the logs. I have used this in the past, but its been a while.
Performance issues, CPU, I/O don't matter. We are doing a BCV copy and then mounting the DB on a new server.

Guess2 wrote:
10.2.0.5.6
OS: Hp-unix
databases files on RAW.
DB Size: 10 TBs+
We had a SAN outage recently. The DB is back online. We want to check for block corruption to be on the safe side. We are planning to take a SAN EMC BCV copy of prod to run this. Looking for opinioms on the best way.Production is up and running. This is just a sanity check.
We are NOT using RMAN for backups. We do a BCV copy and then back that up and archive logs to tape.
RMAN: Can we do this from the control files? Do we have to set anything up? Is this the best way?
DBMS_REPAIR: I have not used this. We don't even have the package installed. I can install it.
DB_VERIFY: not sure if this is a good option or not. Is this current? I know I'll have to do it file by file and grep the logs. I have used this in the past, but its been a while.
Performance issues, CPU, I/O don't matter. We are doing a BCV copy and then mounting the DB on a new server.
bcm@bcm-laptop:~$ dbv -help
DBVERIFY: Release 11.2.0.1.0 - Production on Mon May 21 07:29:42 2012
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)           can be done against any datafile; open or closed, production or clone
Handle:     Guess2
Status Level:     Newbie
Registered:     Aug 5, 2000
Total Posts:     454
Total Questions:     212 (201 unresolved)
WHY so MANY unanswered questions?
Edited by: sb92075 on May 21, 2012 7:31 AM

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 on Standby database

Oracle 10g R2 64bit on Solaris 10 installed on two database server, Sun M5000 and Sun V890
Primary and physical Standby database is configured with Max performance Async mode, log shipping is ok, archive logs are also applying..
I opened the standby database on readonly mode, couple of SQLs are running successfully but few SQLS are throwing error meesaage, here is log message -
SQL> select count(1) from inventory_stock;
select count(1) from inventory_stock
ERROR at line 1:
ORA-01578: ORACLE data block corrupted (file # 12, block # 28109)
ORA-01110: data file 12: '/backup1/np13/data/invindx01.dbf'
ORA-26040: Data block was loaded using the NOLOGGING option
However there is no error meesage recorded in Alert log files related to block corruption. Please suggest

select file#,UNRECOVERABLE_CHANGE#,UNRECOVERABLE_TIME
from V$DATAFILE
where UNRECOVERABLE_TIME is not null
FILE# UNRECOVERABLE_CHANGE# UNRECOVER
4 9.7333E+12 12-SEP-10
5 9.7333E+12 12-SEP-10
6 9.7333E+12 12-SEP-10
7 9.7333E+12 12-SEP-10
9 9.7333E+12 12-SEP-10
12 9.7333E+12 13-SEP-10
13 9.7333E+12 13-SEP-10
14 9.7327E+12 01-SEP-10
15 9.7333E+12 13-SEP-10
17 9.7333E+12 13-SEP-10
22 9.7333E+12 13-SEP-10
23 9.7333E+12 13-SEP-10
24 9.7333E+12 13-SEP-10
32 9.7333E+12 13-SEP-10
33 9.7333E+12 13-SEP-10
34 9.7333E+12 13-SEP-10
35 9.7333E+12 13-SEP-10
41 9.7324E+12 25-AUG-10
42 9.7333E+12 13-SEP-10
43 9.7333E+12 13-SEP-10
44 9.7333E+12 13-SEP-10
45 9.7333E+12 13-SEP-10
57 9.7332E+12 11-SEP-10
60 9.7333E+12 13-SEP-10
62 9.7333E+12 12-SEP-10
63 9.7333E+12 13-SEP-10
65 9.7333E+12 13-SEP-10
66 9.7333E+12 13-SEP-10
68 9.7333E+12 13-SEP-10
70 9.7333E+12 13-SEP-10
71 9.7333E+12 12-SEP-10
73 9.7333E+12 12-SEP-10
74 9.7333E+12 13-SEP-10
75 9.7333E+12 12-SEP-10
77 9.7324E+12 25-AUG-10
79 9.7333E+12 13-SEP-10
83 9.7333E+12 13-SEP-10
84 9.7333E+12 13-SEP-10
86 9.7333E+12 13-SEP-10
87 9.7333E+12 12-SEP-10
89 9.7333E+12 12-SEP-10

Needs help regarding block corruption

DB Version - 11.2.0.3.0
Issue - Last backup failed due to block corruption ,message says "ORA-19566: exceeded limit of 0 corrupt blocks for file /GP/GAA01-N-P/db00/index01/GPEDWPR/bi_gpedw_fcct.dbf'
I tried to perform block recovery using RMAN but it was not present in backup, hence failed. tried in the below way also :-
RMAN> LIST FAILURE
2> ;
using target database control file instead of recovery catalog
List of Database Failures
=========================
Failure ID Priority Status Time Detected Summary
72981 HIGH OPEN 13-JAN-13 Datafile 58: '/GP/GAA01-N-P/db00/index01/GPEDWPR/bi_gpedw_fcct.dbf'
contains one or more corrupt blocks
RMAN> ADVISE FAILURE
2> ;
List of Database Failures
=========================
Failure ID Priority Status Time Detected Summary
72981 HIGH OPEN 13-JAN-13 Datafile 58: '/GP/GAA01-N-P/db00/index01/GPEDWPR/bi_gpedw_fcct..dbf' contains one or more corrupt blocks
analyzing automatic repair options; this may take some time
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=2055 device type=DISK
analyzing automatic repair options complete
Mandatory Manual Actions
========================
1. No backup of block 3106752 in file 58 was found. Drop and re-create the associated object (if possible), or use the DBMS_REPAIR package to repair the block corruption
2. No backup of block 3106911 in file 58 was found. Drop and re-create the associated object (if possible), or use the DBMS_REPAIR package to repair the block corruption
3. No backup of block 3106976 in file 58 was found. Drop and re-create the associated object (if possible), or use the DBMS_REPAIR package to repair the block corruption
4. No backup of block 3107504 in file 58 was found. Drop and re-create the associated object (if possible), or use the DBMS_REPAIR package to repair the block corruption
5. Contact Oracle Support Services if the preceding recommendations cannot be used, or if they do not fix the failures selected for repair
Now how to troubleshoot ? Any help will be highly appreciated

First, you need to determine to which segment the block is assigned:
select segment_type,owner,segment_name
from dba_extents
where file_id=58 and 3106752 between block_id and (blockid + blocks -1);
Your action from there will depend on the type of segment. Since you have no backup, the options are limited. But there are still possibilities.

Block corruption in UNDO datafile

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