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How to use BBED to modify Oracle data File header in kingsql to promote SCN

2025-03-29 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Database >

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This article will explain in detail how to use BBED in kingsql to modify Oracle data file headers to promote SCN. The editor thinks it is very practical, so I share it with you for reference. I hope you can get something after reading this article.

Please read the newspaper. Big mistake:

SQL > startup

ORACLE instance started.

Total System Global Area 1603411968 bytes

Fixed Size 2228784 bytes

Variable Size 989859280 bytes

Database Buffers 603979776 bytes

Redo Buffers 7344128 bytes

Database mounted.

ORA-01113: file 1 needs media recovery

ORA-01110: data file 1:'/ u01 *

SQL > alter database open

Alter database open

*

ERROR at line 1:

ORA-01113: file 1 needs media recovery

ORA-01110: data file 1:'/ u01 *

Now start repairing the data!

SQL > select name,checkpoint_change# from v$datafile

NAME CHECKPOINT_CHANGE#

/ u01/app/oracle/oradata/oggdb2/system01.dbf 2147548266

/ u01/app/oracle/oradata/oggdb2/sysaux01.dbf 2147548266

/ u01/app/oracle/oradata/oggdb2/undotbs01.dbf 2147548266

/ u01/app/oracle/oradata/oggdb2/users01.dbf 2147548266

/ u01/app/oracle/oradata/oggdb2/example01.dbf 2147548266

/ u01/app/oracle/oradata/oggdb2/gguser.dbf 2147548266

/ u01/app/oracle/oradata/oggdb2/p2pdata01.dbf 2147548266

7 rows selected.

SQL > select name,checkpoint_change# from v$datafile_header

NAME CHECKPOINT_CHANGE#

/ u01/app/oracle/oradata/oggdb2/system01.dbf 2147546874

/ u01/app/oracle/oradata/oggdb2/sysaux01.dbf 2147548266

/ u01/app/oracle/oradata/oggdb2/undotbs01.dbf 2147548266

/ u01/app/oracle/oradata/oggdb2/users01.dbf 2147548266

/ u01/app/oracle/oradata/oggdb2/example01.dbf 2147548266

/ u01/app/oracle/oradata/oggdb2/gguser.dbf 2147548266

/ u01/app/oracle/oradata/oggdb2/p2pdata01.dbf 2147548266

Repair process:

1. Modify the value of the old data file header scn

BBED > dump offset 484

File: / u01/app/oracle/oradata/oggdb2/system01.dbf (1)

Block: 1 Offsets: 484 to 983 Dba:0x00400001

8e4a0180 00000000 243e333b 01000000 94000000 02000000 10000000 02000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

0d000d00 0d000100 00000000 00000000 00000000 02004000 32270f00 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000 02ace702 c1770dd9 007b503c cfdee590 34000000

00000000 00000000 00000000 00012997 2a000000 38020000 00000000 c08c5ef2

05fe25a5 9d6b999e 14265f03 1ef30600 00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

BBED > m / x 654f0180 offset 484

File: / u01/app/oracle/oradata/oggdb2/system01.dbf (1)

Block: 1 Offsets: 484 to 983 Dba:0x00400001

654f0180 00000000 243e333b 01000000 94000000 02000000 10000000 02000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

0d000d00 0d000100 00000000 00000000 00000000 02004000 32270f00 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000 02ace702 c1770dd9 007b503c cfdee590 34000000

00000000 00000000 00000000 00012997 2a000000 38020000 00000000 c08c5ef2

05fe25a5 9d6b999e 14265f03 1ef30600 00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

two。 View and correct the value of the data file header chckpoint_time

Fixed link http://blog.itpub.net/28389881/viewspace-2221607/ for this article

BBED > dump offset 492

File: / u01/app/oracle/oradata/oggdb2/system01.dbf (1)

Block: 1 Offsets: 492 to 991 Dba:0x00400001

243e333b 01000000 94000000 02000000 10000000 02000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000 0d000d00 0d000100

00000000 00000000 00000000 02004000 32270f00 00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 02ace702 c1770dd9 007b503c cfdee590 34000000 00000000 00000000

00000000 00012997 2a000000 38020000 00000000 c08c5ef2 05fe25a5 9d6b999e

14265f03 1ef30600 00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

BBED > m / x be42333b offset 492

File: / u01/app/oracle/oradata/oggdb2/system01.dbf (1)

Block: 1 Offsets: 492 to 991 Dba:0x00400001

Be42333b 01000000 94000000 02000000 10000000 02000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000 0d000d00 0d000100

00000000 00000000 00000000 02004000 32270f00 00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 02ace702 c1770dd9 007b503c cfdee590 34000000 00000000 00000000

00000000 00012997 2a000000 38020000 00000000 c08c5ef2 05fe25a5 9d6b999e

14265f03 1ef30600 00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

3. Modify the checkpoint counter (kcvfhcpc) in the old data file header

BBED > dump offset 140

File: / u01/app/oracle/oradata/oggdb2/system01.dbf (1)

Block: 1 Offsets: 140 to 639 Dba:0x00400001

28010000 223e333b 27010000 00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 06005359 5354454d 00000000 00000000 00000000

00000000 01000000 00000000 00000000 00000000

00000000 00000000 00000000 0a000a00 5c776c2d 01000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000 654f0180 00000000

Be42333b 01000000 94000000 02000000 10000000 02000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

BBED > m / x 2a010000 offset 140

File: / u01/app/oracle/oradata/oggdb2/system01.dbf (1)

Block: 1 Offsets: 140 to 639 Dba:0x00400001

2a010000 223e333b 27010000 00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 06005359 5354454d 00000000 00000000 00000000

00000000 01000000 00000000 00000000 00000000

00000000 00000000 00000000 0a000a00 5c776c2d 01000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000 654f0180 00000000

Be42333b 01000000 94000000 02000000 10000000 02000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

4. Modify the value of the counter (kcvfhccc) in the old data file header that controls file backup

BBED > dump offset 148

File: / u01/app/oracle/oradata/oggdb2/system01.dbf (1)

Block: 1 Offsets: 148 to 647 Dba:0x00400001

5c537c9d 00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000 06005359

5354454d 00000000 00000000 00000000 01000000

00000000 00000000 00000000

00000000 00000000 0a000a00 5c776c2d 01000000 00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000 654f0180 00000000 be42333b 01000000

94000000 02000000 10000000 02000000 00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

BBED > m / x 29010000 offset 148

File: / u01/app/oracle/oradata/oggdb2/system01.dbf (1)

Block: 1 Offsets: 148 to 647 Dba:0x00400001

29010000 00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000 06005359

5354454d 00000000 00000000 00000000 01000000

00000000 00000000 00000000

00000000 00000000 0a000a00 5c776c2d 01000000 00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000 654f0180 00000000 be42333b 01000000

94000000 02000000 10000000 02000000 00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

00000000 00000000 00000000

5. Regenerate sum

BBED > sum apply

Check value for File 1, Block 1:

Current = 0xec9b, required = 0xec9b

6. Query each data file header scn

SQL > select file#,checkpoint_change#,name from v$datafile_header

FILE# CHECKPOINT_CHANGE# NAME

-

1 2147548266 / u01/app/oracle/oradata/oggdb2/system01.dbf

2 2147548266 / u01/app/oracle/oradata/oggdb2/sysaux01.dbf

3 2147548266 / u01/app/oracle/oradata/oggdb2/undotbs01.dbf

4 2147548266 / u01/app/oracle/oradata/oggdb2/users01.dbf

5 2147548266 / u01/app/oracle/oradata/oggdb2/example01.dbf

6 2147548266 / u01/app/oracle/oradata/oggdb2/gguser.dbf

7 2147548266 / u01/app/oracle/oradata/oggdb2/p2pdata01.dbf

7 rows selected.

7 rows selected.

SQL > alter database open

Database altered.

So far, the database has been started successfully.

On "how to use BBED in kingsql to modify Oracle data file headers to promote SCN" this article is shared here, I hope the above content can be of some help to you, so that you can learn more knowledge, if you think the article is good, please share it out for more people to see.

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