Question: Please give me solution for
below error during Oracle startup command:
ORA-01092: ORACLE Instance terminated. Disconnected forced
My alert log shows these errors:
Errors in file g:\oracle\product\10.1.0\admin\hrdev\udump\hrdev_ora_196.trc:
ORA-01578: ORACLE data block corrupted (file #
1, block # 57371)
ORA-01110: data file 1: 'G:\ORACLE\PRODUCT\10.1.0\ORADATA\HRDEV\SYSTEM01.DBF'
Error 1578 happened during
db open, shutting down database
USER: terminating instance due to error 1578
Thu Apr 07 10:06:54 2011
Errors in file g:\oracle\product\10.1.0\admin\hrdev\bdump\hrdev_pmon_860.trc:
ORA-01578: ORACLE data block corrupted (file #
, block # )
Thu Apr 07 10:06:54 2011
Errors in file g:\oracle\product\10.1.0\admin\hrdev\bdump\hrdev_mman_1660.trc:
ORA-01578: ORACLE data block corrupted (file #
, block # )
Thu Apr 07 10:06:54 2011
Errors in file g:\oracle\product\10.1.0\admin\hrdev\bdump\hrdev_reco_828.trc:
ORA-01578: ORACLE data block corrupted (file #
, block # )
Thu Apr 07 10:06:54 2011
Errors in file g:\oracle\product\10.1.0\admin\hrdev\bdump\hrdev_ckpt_4064.trc:
ORA-01578: ORACLE data block corrupted (file #
, block # )
Thu Apr 07 10:06:54 2011
Errors in file g:\oracle\product\10.1.0\admin\hrdev\bdump\hrdev_dbw0_3076.trc:
ORA-01578: ORACLE data block corrupted (file #
, block # )
Thu Apr 07 10:06:55 2011
Errors in file g:\oracle\product\10.1.0\admin\hrdev\bdump\hrdev_lgwr_2508.trc:
ORA-01578: ORACLE data block corrupted (file #
, block # )
Thu Apr 07 10:07:08 2011
Instance terminated by USER, pid = 196
ORA-1092 signalled during: ALTER DATABASE
OPEN...
How to I diagnose and fix this ORA-01578 error?
Answer: Since you are getting a ORA-01578
running Oracle on a personal computer (Windows), it's a safe bet
that you have a disk crash. Oracle is not designed to run on
PC's, it made for industrial strength servers.
The ORA-01092: ORACLE instance terminated error can be caused by
many factors, and the alert log reveals the real cause:
- Running Oracle on Windows
- A shutdown abort
- Bad permissions of BDUMP, CDUMP or UDUMP
directories
- Missing datafiles
- Data corruption
- Renaming files when Oracle is down
- and many other OS-related causes
In your case, the ORA-01578 block
corruption error, with is related to the
ORA-26040 corrupt block error:
ORA-01578: ORACLE data block corrupted
To diagnose the ORA-01578 error, use the
oerr utility to look-up the ORA-01579 error:
ORA-01578: ORACLE data block
corrupted (file # string, block # string)
Cause: The data block indicated
was corrupted, mostly due to software errors.
Action: Try to restore the
segment containing the block indicated.
This may involve
dropping the segment and recreating it.
If there is a trace
file, report the errors in it to your ORACLE representative.
Normally,
block corruption is often due to a hardware error, and there is
likely a trace file or log entry that was made when it happened.
By examining the trace
file, you can often tel the root cause of the corruption, or an
Oracle Representative must now tell you the
root cause of the
corruption.
Beware, you may need to perform an RMAN
recovery on this database, up to the point of the corruption,
usually a disk failure.
Open an SR IMMEDIATELY
with
MOSC.
Oracle technical Support can use the block
editor (BBED) utility to inspect the data blocks and see
EXACTLY why they became corrupted. You can also inspect the
blocks with BBED yourself.
For additional information on handling
corruption, see the
BC expert notes on corruption and see MOSC Note 1088018.1 -
Handling Oracle Database Corruption Issues.
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