Category Archives: obet修复坏块

kcratr_nab_less_than_odr和system坏块故障处理

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标题：kcratr_nab_less_than_odr和system坏块故障处理

作者：惜分飞©版权所有[未经本人同意,不得以任何形式转载,否则有进一步追究法律责任的权利.]

学校客户由于机房断电,导致数据库异常.现场工程师进行了现场备份,然后尝试强制拉库,结果没有成功,大概报错和操作过程如下:
断电之后启动数据库,数据库报ORA-600 kcratr_nab_less_than_odr故障解决错误,这个是一种非常常见的操作,一般是由于写丢失导致,以前有过很多类似恢复经历:
ORA-600 kcratr_nab_less_than_odr故障解决
差点被误操作的ORA-600 kcratr_nab_less_than_odr故障
ORA-600 kcratr_nab_less_than_odr和ORA-600 2662故障处理
ORA-600 kcratr_nab_less_than_odr和ORA-600 4193故障处理

Tue Aug 18 23:59:19 2026
ALTER DATABASE OPEN
This instance was first to open
Beginning crash recovery of 2 threads
 parallel recovery started with 19 processes
Started redo scan
Completed redo scan
 read 21634 KB redo, 800 data blocks need recovery
Errors in file /u01/app/oracle/diag/rdbms/orcl/orcl2/trace/orcl2_ora_275950.trc  (incident=703037):
ORA-00600: internal error code, arguments: [kcratr_nab_less_than_odr], [1], [6916], [3], [4], [], [], [], []
Incident details in: /u01/app/oracle/diag/rdbms/orcl/orcl2/incident/incdir_703037/orcl2_ora_275950_i703037.trc
Use ADRCI or Support Workbench to package the incident.
See Note 411.1 at My Oracle Support for error and packaging details.
Abort recovery for domain 0
Aborting crash recovery due to error 600
Errors in file /u01/app/oracle/diag/rdbms/orcl/orcl2/trace/orcl2_ora_275950.trc:
ORA-00600: internal error code, arguments: [kcratr_nab_less_than_odr], [1], [6916], [3], [4], [], [], [], []
Abort recovery for domain 0
Errors in file /u01/app/oracle/diag/rdbms/orcl/orcl2/trace/orcl2_ora_275950.trc:
ORA-00600: internal error code, arguments: [kcratr_nab_less_than_odr], [1], [6916], [3], [4], [], [], [], []
ORA-600 signalled during: ALTER DATABASE OPEN...

现场恢复人员上来之后,直接尝试做强制resetlogs操作,数据库报ORA-600 ORA-600 krsi_al_hdr_update.15错误,主要是由于redo写丢失导致无法resetlogs成功,具体参考：Alter Database Open Resetlogs returns error ORA-00600: [krsi_al_hdr_update.15], (Doc ID 2026541.1) Oracle断电故障处理

Wed Aug 19 00:28:47 2026
alter database open resetlogs
RESETLOGS is being done without consistancy checks. This may result
in a corrupted database. The database should be recreated.
RESETLOGS after incomplete recovery UNTIL CHANGE 29721342127
Archived Log entry 38935 added for thread 1 sequence 6916 ID 0xceea62af dest 1:
ARCH: All Archive destinations made inactive due to error 742
ARCH: Closing local archive destination LOG_ARCHIVE_DEST_1: '+ARCHDG/2_19951_1224781365.arc' (error 742)(orcl2)
Errors in file /u01/app/oracle/diag/rdbms/orcl/orcl2/trace/orcl2_ora_287355.trc  (incident=727038):
ORA-00600: internal error code, arguments: [krsi_al_hdr_update.15], [4294967295], [], [], [], [], [], [], []
Incident details in: /u01/app/oracle/diag/rdbms/orcl/orcl2/incident/incdir_727038/orcl2_ora_287355_i727038.trc
Use ADRCI or Support Workbench to package the incident.
See Note 411.1 at My Oracle Support for error and packaging details.
Master archival failure: 600
Archive all online redo logfiles failed:600
ORA-600 signalled during: alter database open resetlogs...

通过 ALTER DATABASE RECOVER database using backup controlfile until cancel之后,继续尝试强制打开库，报ORA-600 2662错误.

Wed Aug 19 00:40:25 2026
Checker run found 32 new persistent data failures
alter database open resetlogs
RESETLOGS is being done without consistancy checks. This may result
in a corrupted database. The database should be recreated.
RESETLOGS after incomplete recovery UNTIL CHANGE 29721342127
Archived Log entry 38936 added for thread 1 sequence 6915 ID 0xceea62af dest 1:
Archived Log entry 38937 added for thread 1 sequence 6916 ID 0xceea62af dest 1:
Archived Log entry 38938 added for thread 2 sequence 19951 ID 0xceea62af dest 1:
Archived Log entry 38939 added for thread 2 sequence 19950 ID 0xceea62af dest 1:
Clearing online redo logfile 1 +DATADG/orcl/onlinelog/group_1.319.1224781365
Clearing online log 1 of thread 1 sequence number 6915
Wed Aug 19 00:40:34 2026
Clearing online redo logfile 1 complete
Clearing online redo logfile 2 +DATADG/orcl/onlinelog/group_2.320.1224781367
Clearing online log 2 of thread 1 sequence number 6916
Clearing online redo logfile 2 complete
Clearing online redo logfile 3 +DATADG/orcl/onlinelog/group_3.323.1224781463
Clearing online log 3 of thread 2 sequence number 19951
Clearing online redo logfile 3 complete
Clearing online redo logfile 4 +DATADG/orcl/onlinelog/group_4.324.1224781465
Clearing online log 4 of thread 2 sequence number 19950
Clearing online redo logfile 4 complete
Resetting resetlogs activation ID 3471467183 (0xceea62af)
Online log +DATADG/orcl/onlinelog/group_1.319.1224781365: Thread 1 Group 1 was previously cleared
Online log +ARCHDG/orcl/onlinelog/group_1.4574.1224781367: Thread 1 Group 1 was previously cleared
Online log +DATADG/orcl/onlinelog/group_2.320.1224781367: Thread 1 Group 2 was previously cleared
Online log +ARCHDG/orcl/onlinelog/group_2.10729.1224781369: Thread 1 Group 2 was previously cleared
Online log +DATADG/orcl/onlinelog/group_3.323.1224781463: Thread 2 Group 3 was previously cleared
Online log +ARCHDG/orcl/onlinelog/group_3.12866.1224781463: Thread 2 Group 3 was previously cleared
Online log +DATADG/orcl/onlinelog/group_4.324.1224781465: Thread 2 Group 4 was previously cleared
Online log +ARCHDG/orcl/onlinelog/group_4.7527.1224781465: Thread 2 Group 4 was previously cleared
Wed Aug 19 00:40:43 2026
Setting recovery target incarnation to 3
Wed Aug 19 00:40:43 2026
Assigning activation ID 3488382552 (0xcfec7e58)
Thread 2 opened at log sequence 1
  Current log# 3 seq# 1 mem# 0: +DATADG/orcl/onlinelog/group_3.323.1224781463
  Current log# 3 seq# 1 mem# 1: +ARCHDG/orcl/onlinelog/group_3.12866.1224781463
Successful open of redo thread 2
MTTR advisory is disabled because FAST_START_MTTR_TARGET is not set
Wed Aug 19 00:40:43 2026
SMON: enabling cache recovery
Errors in file /u01/app/oracle/diag/rdbms/orcl/orcl2/trace/orcl2_ora_291405.trc  (incident=739007):
ORA-00600: internal error code, arguments: [2662], [6], [3951555809], [6], [3951556555], [12583040], [], []
Incident details in: /u01/app/oracle/diag/rdbms/orcl/orcl2/incident/incdir_739007/orcl2_ora_291405_i739007.trc
Wed Aug 19 00:40:45 2026
Use ADRCI or Support Workbench to package the incident.
See Note 411.1 at My Oracle Support for error and packaging details.
Errors in file /u01/app/oracle/diag/rdbms/orcl/orcl2/trace/orcl2_ora_291405.trc:
ORA-00600: internal error code, arguments: [2662], [6], [3951555809], [6], [3951556555], [12583040], [], []
Errors in file /u01/app/oracle/diag/rdbms/orcl/orcl2/trace/orcl2_ora_291405.trc:
ORA-00600: internal error code, arguments: [2662], [6], [3951555809], [6], [3951556555], [12583040], [], []
Error 600 happened during db open, shutting down database
USER (ospid: 291405): terminating the instance due to error 600
Instance terminated by USER, pid = 291405
ORA-1092 signalled during: alter database open resetlogs...

到这一步,现场停止了继续尝试,我接手故障处理.先dbv检测坏块,发现system有两个坏块

[oracle@db3 ~]$ dbv userid=sys/oracle file=/datapool/cold_backup_20260818/SYSTEM.314.1224781265

DBVERIFY: Release 11.2.0.4.0 - Production on Sat Aug 22 10:39:26 2026

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

DBVERIFY - Verification starting : FILE = /datapool/cold_backup_20260818/SYSTEM.314.1224781265
Page 94587 is marked corrupt
Corrupt block relative dba: 0x0041717b (file 1, block 94587)
Bad header found during dbv: 
Data in bad block:
 type: 11 format: 2 rdba: 0x00400001
 last change scn: 0x0000.00000000 seq: 0x1 flg: 0x04
 spare1: 0x0 spare2: 0x0 spare3: 0x0
 consistency value in tail: 0x00000b01
 check value in block header: 0xd49
 computed block checksum: 0x0

Page 95021 is marked corrupt
Corrupt block relative dba: 0x0041732d (file 1, block 95021)
Bad header found during dbv: 
Data in bad block:
 type: 11 format: 2 rdba: 0x00400001
 last change scn: 0x0000.00000000 seq: 0x1 flg: 0x04
 spare1: 0x0 spare2: 0x0 spare3: 0x0
 consistency value in tail: 0x00000b01
 check value in block header: 0xd49
 computed block checksum: 0x0



DBVERIFY - Verification complete

Total Pages Examined         : 157440
Total Pages Processed (Data) : 72079
Total Pages Failing   (Data) : 0
Total Pages Processed (Index): 21854
Total Pages Failing   (Index): 0
Total Pages Processed (Other): 49484
Total Pages Processed (Seg)  : 1
Total Pages Failing   (Seg)  : 0
Total Pages Empty            : 14021
Total Pages Marked Corrupt   : 2
Total Pages Influx           : 0
Total Pages Encrypted        : 0
Highest block SCN            : 0 (0.0)

OBET> dbv file 1

===============================================
DBV (Data Block Verification)
Block Size: 8192 bytes
Endian:     little-endian (x86)
Target File: #1(only)
===============================================

Verifying file #1: /datapool/cold_backup_20260818/SYSTEM.314.1224781265 (157441 blocks) - Started: 2026-08-22 11:14:48
File #32: rfile=1 (0x00000001)  header_block_num=157440 (0x00026700)  filesize_status:OK
  Progress: 100000 / 157441 blocks checked...
  File #1completed: 0 all zero, 0 soft corrupted, 2 tailchk error, 0 checksum error, 0 rdba error

DBV completed at: 2026-08-22 11:14:59

===============================================
DBV Summary:
Total blocks checked: 157439
Total all zero blocks found: 0
Total all rdba error blocks found: 0
Total all tailchk error blocks found: 2
Total all soft corrupted blocks found: 0
Total all checksum error blocks found: 0
Total bad blocks found: 2
Execution time: 11.00 seconds
Throughput: 111.82 MB/s
===============================================

Detailed report saved to: dbv_file_32_20260822111448.log
Files processed: 1

OBET> list corrupt
file 1(/datapool/cold_backup_20260818/SYSTEM.314.1224781265) total bad blocks: 2
block#   bad block type
94587   tailchk
95021   tailchk

使用obet修复坏块
Oracle Block Editor Tool使用手册

OBET> set file 32
filename set to: /datapool/cold_backup_20260818/SYSTEM.314.1224781265 (file#1)

OBET> set block 94587
block set to: 94587

OBET> set mode edit
mode set to: edit

OBET> repair block
Warning: Missing value for 'block', using global setting: 94587

Repairing block 94587 in file /datapool/cold_backup_20260818/SYSTEM.314.1224781265...

Repair analysis for block 94587:
1. seq_kcbh check: 0x01 -> OK
2. Tailchk check: 0x0106C0E4 -> needs repair (0xE4C00601)
3. Checksum check: 0x5EC5 -> needs repair (0x7DE6)

Confirm repair operations:
File: /datapool/cold_backup_20260818/SYSTEM.314.1224781265
Block: 94587
Operations needed: fix tailchk, fix checksum
Confirm? (Y/YES to proceed): y

Verification after repair:
1. seq_kcbh: 0x01 OK
2. Tailchk: 0x0106C0E4 OK
3. Checksum: 0x7DE6 OK

Block 94587 repair completed successfully.

OBET> set block 95021
block set to: 95021

OBET> repair block 
Warning: Missing value for 'block', using global setting: 95021

Repairing block 95021 in file /datapool/cold_backup_20260818/SYSTEM.314.1224781265...

Repair analysis for block 95021:
1. seq_kcbh check: 0x01 -> OK
2. Tailchk check: 0xF8FA0601 -> needs repair (0xE06C0601)
3. Checksum check: 0x81BA -> OK

Confirm repair operations:
File: /datapool/cold_backup_20260818/SYSTEM.314.1224781265
Block: 95021
Operations needed: fix tailchk
Confirm? (Y/YES to proceed): y

Verification after repair:
1. seq_kcbh: 0x01 OK
2. Tailchk: 0x01066CE0 OK
3. Checksum: 0x81BA OK

Block 95021 repair completed successfully.

dbv检查确认坏块修复成功

[oracle@db3 ~]$ dbv file=/datapool/cold_backup_20260818/SYSTEM.314.1224781265

DBVERIFY: Release 11.2.0.4.0 - Production on Sat Aug 22 11:17:30 2026

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

DBVERIFY - Verification starting : FILE = /datapool/cold_backup_20260818/SYSTEM.314.1224781265


DBVERIFY - Verification complete

Total Pages Examined         : 157440
Total Pages Processed (Data) : 72080
Total Pages Failing   (Data) : 0
Total Pages Processed (Index): 21855
Total Pages Failing   (Index): 0
Total Pages Processed (Other): 49484
Total Pages Processed (Seg)  : 1
Total Pages Failing   (Seg)  : 0
Total Pages Empty            : 14021
Total Pages Marked Corrupt   : 0
Total Pages Influx           : 0
Total Pages Encrypted        : 0
Highest block SCN            : 3951556890 (6.3951556890)

后面的恢复比较简单,使用客户恢复之前的备份,直接重建ctl,然后打开库成功,并且做rman校验没有异常,直接把恢复之后的库备份还原到asm里面,完成本次恢复任务

obet(Oracle Block Editor Tool)第二版发布

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联系：手机/微信(+86 17813235971) QQ(107644445)QQ咨询惜分飞

标题：obet(Oracle Block Editor Tool)第二版发布

作者：惜分飞©版权所有[未经本人同意,不得以任何形式转载,否则有进一步追究法律责任的权利.]

在几天之前发布了obet的第一个版本（Oracle数据块编辑工具( Oracle Block Editor Tool)-obet）,最近对功能进行了一些完善,并发布第二版（下载地址:下载obet），主要增加了以下几个功能:
0) corrupt [block x] 命令主要用于标记坏块功能(在第一版中已经完善)
1) repair [block x] 命令对于坏块的自动修复,主要包括checksum,tailchk,seq_kcbh等
2）增加copy chkscn 命令主要用于对文件头的checkpoint scn相关信息修复
3）增加copy resetlogscn命令主要用于对文件头的resetlogs相关信息修复
4）把之前的copy命令调整为copy data命令格式
5）增加copy block命令主要用于数据文件之间的数据块直接拷贝
该版本的help命令提示

OBET (Oracle Block Editor Tool) commands:
  open <config_file>    - Load file list from config file (format: <num> <path>)
  info                  - Show loaded file list (from open command)
  set filename <path>   - Set target file path (required)
  set file <num>        - Set filename using loaded file number (from open list)
  set blocksize <size>  - Set block size (2048,4096,[8192],16384,32768)
  set block <num>       - Set block number (starts from 0, default: 1)
  set offset <offset>   - Set offset within block (< blocksize, default: 0)
  set count <bytes>     - Set number of bytes to read (default: 32)
  set mode edit/browse  - Enable edit/browse mode
  d/dump [options]      - Display data (options: block X, offset Y, count N)
  m/modify <hex> [opts] - Modify data with hex (opts: block X, offset Y)
  undo                  - Undo last modification
  sum [block X]         - Calculate checksum for block (default: current block)
  sum apply [block X]   - Apply checksum: write calculated value to block
  tailchk [block X]     - Calculate tailchk for block (default: current block)
  tailchk apply [block X] - Apply tailchk: write calculated value to block
  repair [block X]      - Repair bad block (fix seq_kcbh, tailchk, checksum)
  copy data <src> to <dest>  - Copy data between files
    <src> format: file,block,offset,count (e.g., 1,1,10,64)
    <dest> format: file[,block][,offset] (e.g., 3 or 3,1 or 3,1,128)
  copy block file#,block# to file#,block#     - Copy entire data block
  copy chkscn file n to file m         - Copy datafile header checkpoint SCN info
  copy resetlogscn file n to file m    - Copy datafile header resetlogs info
  corrupt [block X]     - Mark block as corrupted (default: current block)
  show                  - Display current settings (filename, blocksize, block, offset, count, mode)
  license               - Show/manage software license (registration code required)
  version               - Show software version and developer information
  p/print <param>       - Print Oracle structure,Use the 'p/print' command to see details
  undo                  - Undo the last copy chkscn or copy resetlogscn operation
  help                  - Show this help message
  quit/exit             - Exit OBET

copy block功能演示
随便把一个block拷贝到文件的另外位置,也可以拷贝到不同文件的其他位置,根据需要调整

OBET> copy block 1,1 to 1,5

Confirm copy block:
Source: file#1 (/u01/xifenfei/system01.dbf), block 1 (entire 8192-byte block)
Target: file#1 (/u01/xifenfei/system01.dbf), block 5 (entire 8192-byte block)
Proceed? (Y/YES to confirm): y
Successfully copied block 1 from file#1 to block 5 in file#1 (8192 bytes).

OBET> set file 1 
filename set to: /u01/xifenfei/system01.dbf (file#1)

OBET> set count 128
count set to: 128

OBET> dump block 1 offset 0

File: /u01/xifenfei/system01.dbf
Block: 1                Offsets:     0 to   127
--------------------------------------------------------------------------------
00002000 01230000 01004000 00000000 00000104 28C60000 00000000 0004200B A2DB266A 
00002020 58494645 4E464549 AC020000 00720100 00200000 01000300 00000000 00000000 
00002040 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 
00002060 08024000 07000000 00000000 7DC92131 12345678 87654321 00000000 00000000 

<128 bytes read>

OBET> dump block 5 offset 0

File: /u01/xifenfei/system01.dbf
Block: 5                Offsets:     0 to   127
--------------------------------------------------------------------------------
0000A000 01230000 01004000 00000000 00000104 28C60000 00000000 0004200B A2DB266A 
0000A020 58494645 4E464549 AC020000 00720100 00200000 01000300 00000000 00000000 
0000A040 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 
0000A060 08024000 07000000 00000000 7DC92131 12345678 87654321 00000000 00000000 

<128 bytes read>

copy chkscn功能演示

OBET> p kcvfh.kcvfhckp
File: H:\xifenfei\system01.dbf
Size: 8192 bytes
Block: 1
Offset: 484

struct kcvfhckp, 36 bytes                   @484
   struct kcvcpscn, 8 bytes                 @484
      ub4 kscnbas                          @484     0x1BDDBF09
      ub2 kscnwrp                          @488     0x163D
      ub2 kscnwrp2                         @490     0x0000
   ub4 kcvcptim                            @492     0x488361FC
   ub2 kcvcpthr                            @496     0x0001
   union u, 12 bytes                       @500
      struct kcvcprba, 12 bytes            @500
         ub4 kcrbaseq                     @500     0x0006E3D3
         ub4 kcrbabno                     @504     0x0000B44B
         ub2 kcrbabof                     @508     0x0010
   ub1 kcvcpetb[8]                         @512-519 02 00 00 00 00 00 00 00


OBET> p kcvfh.kcvfhckp
File: H:\xifenfei\sysaux01.dbf
Size: 8192 bytes
Block: 1
Offset: 484

struct kcvfhckp, 36 bytes                   @484
   struct kcvcpscn, 8 bytes                 @484
      ub4 kscnbas                          @484     0x67452301
      ub2 kscnwrp                          @488     0x0000
      ub2 kscnwrp2                         @490     0x0000
   ub4 kcvcptim                            @492     0x00000000
   ub2 kcvcpthr                            @496     0x0000
   union u, 12 bytes                       @500
      struct kcvcprba, 12 bytes            @500
         ub4 kcrbaseq                     @500     0x0006E3D3
         ub4 kcrbabno                     @504     0x0000B44B
         ub2 kcrbabof                     @508     0x0010
   ub1 kcvcpetb[8]                         @512-519 02 00 00 00 00 00 00 00

<kcvfh.kcvfhckp structure printed successfully>



OBET> copy chkscn file 1 to file 2

Confirm Modify chkscn:
Source: file#1 (H:\xifenfei\system01.dbf)
Target: file#2 (H:\xifenfei\sysaux01.dbf)
Proceed? (Y/YES to confirm): y
Successfully copied checkpoint SCN information from file#1 to file#2.

OBET> p kcvfh.kcvfhckp
File: H:\xifenfei\sysaux01.dbf
Size: 8192 bytes
Block: 1
Offset: 484

struct kcvfhckp, 36 bytes                   @484
   struct kcvcpscn, 8 bytes                 @484
      ub4 kscnbas                          @484     0x1BDDBF09
      ub2 kscnwrp                          @488     0x163D
      ub2 kscnwrp2                         @490     0x0000
   ub4 kcvcptim                            @492     0x488361FC
   ub2 kcvcpthr                            @496     0x0001
   union u, 12 bytes                       @500
      struct kcvcprba, 12 bytes            @500
         ub4 kcrbaseq                     @500     0x0006E3D3
         ub4 kcrbabno                     @504     0x0000B44B
         ub2 kcrbabof                     @508     0x0010
   ub1 kcvcpetb[8]                         @512-519 02 00 00 00 00 00 00 00

<kcvfh.kcvfhckp structure printed successfully>

copy resetlogscn功能演示

OBET> p kcvfh.kcvfhrlc
File: H:\xifenfei\system01.dbf
Size: 8192 bytes
Block: 1
Offset: 112

ub4 kcvfhrlc                             @112     0x3215EC5C

<kcvfh.kcvfhrlc structure printed successfully>

OBET> p kcvfh.kcvfhrls
File: H:\xifenfei\system01.dbf
Size: 8192 bytes
Block: 1
Offset: 116

struct kcvfhrls, 8 bytes                    @116
   ub4 kscnbas                             @116     0x000E74FF
   ub2 kscnwrp                             @120     0x0000
   ub2 kscnwrp2                            @122     0x0000

<kcvfh.kcvfhrls structure printed successfully>


OBET> p kcvfh.kcvfhrlc
File: H:\xifenfei\sysaux01.dbf
Size: 8192 bytes
Block: 1
Offset: 112

ub4 kcvfhrlc                             @112     0x67452301

<kcvfh.kcvfhrlc structure printed successfully>

OBET> p kcvfh.kcvfhrls
File: H:\xifenfei\sysaux01.dbf
Size: 8192 bytes
Block: 1
Offset: 116

struct kcvfhrls, 8 bytes                    @116
   ub4 kscnbas                             @116     0x43658709
   ub2 kscnwrp                             @120     0x0021
   ub2 kscnwrp2                            @122     0x0000

<kcvfh.kcvfhrls structure printed successfully>

OBET> copy resetlogscn file 1 to file 2

Confirm Modify resetlogscn:
Source: file#1 (H:\xifenfei\system01.dbf)
Target: file#2 (H:\xifenfei\sysaux01.dbf)
Proceed? (Y/YES to confirm): y
Successfully copied resetlog SCN information from file#1 to file#2.

OBET> p kcvfh.kcvfhrlc
File: H:\xifenfei\sysaux01.dbf
Size: 8192 bytes
Block: 1
Offset: 112

ub4 kcvfhrlc                             @112     0x3215EC5C

<kcvfh.kcvfhrlc structure printed successfully>

OBET> p kcvfh.kcvfhrls
File: H:\xifenfei\sysaux01.dbf
Size: 8192 bytes
Block: 1
Offset: 116

struct kcvfhrls, 8 bytes                    @116
   ub4 kscnbas                             @116     0x000E74FF
   ub2 kscnwrp                             @120     0x0000
   ub2 kscnwrp2                            @122     0x0000

<kcvfh.kcvfhrls structure printed successfully>

corrupt [block x]标记坏块功能

C:\Users\XFF>dbv file=h:/xifenfei/users01.dbf

DBVERIFY: Release 11.2.0.4.0 - Production on 星期三 11月 12 21:40:55 2025

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

DBVERIFY - 开始验证: FILE = H:\XIFENFEI\USERS01.DBF


DBVERIFY - 验证完成

检查的页总数: 26656
处理的页总数 (数据): 23569
失败的页总数 (数据): 0
处理的页总数 (索引): 309
失败的页总数 (索引): 0
处理的页总数 (其他): 720
处理的总页数 (段)  : 0
失败的总页数 (段)  : 0
空的页总数: 2058
标记为损坏的总页数: 0
流入的页总数: 0
加密的总页数        : 0
最高块 SCN            : 2255414715 (18.2255414715)


OBET> corrupt block 10

Confirm modification:
File: h:/xifenfei/users01.dbf
Block: 10
Offset: 14 (file offset: 0x0001400E)
Original value: 01
New value:      FF
Are you sure to set this block corrupted? (Y/YES to proceed): y
Verification successful: Block 10 marked as corrupted (offset 14 set to 0xFF).
Modification successful.

C:\Users\XFF>dbv file=h:/xifenfei/users01.dbf

DBVERIFY: Release 11.2.0.4.0 - Production on 星期三 11月 12 21:41:22 2025

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

DBVERIFY - 开始验证: FILE = H:\XIFENFEI\USERS01.DBF
页 10 流入 - 很可能是介质损坏
Corrupt block relative dba: 0x0100000a (file 4, block 10)
Fractured block found during dbv:
Data in bad block:
 type: 30 format: 2 rdba: 0x0100000a
 last change scn: 0x0000.00003e78 seq: 0xff flg: 0x04
 spare1: 0x0 spare2: 0x0 spare3: 0x0
 consistency value in tail: 0x3e781e01
 check value in block header: 0x1a6
 computed block checksum: 0xfe



DBVERIFY - 验证完成

检查的页总数: 26656
处理的页总数 (数据): 23569
失败的页总数 (数据): 0
处理的页总数 (索引): 309
失败的页总数 (索引): 0
处理的页总数 (其他): 719
处理的总页数 (段)  : 0
失败的总页数 (段)  : 0
空的页总数: 2058
标记为损坏的总页数: 1
流入的页总数: 1
加密的总页数        : 0
最高块 SCN            : 2255414715 (18.2255414715)

repair [block x]修复坏块功能

C:\Users\XFF>dbv file=h:/xifenfei/undo01.dbf

DBVERIFY: Release 11.2.0.4.0 - Production on 星期日 11月 16 00:06:59 2025

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

DBVERIFY - 开始验证: FILE = H:\XIFENFEI\UNDO01.DBF
页 2 流入 - 很可能是介质损坏
Corrupt block relative dba: 0x02000002 (file 8, block 2)
Fractured block found during dbv:
Data in bad block:
 type: 29 format: 2 rdba: 0x02000002
 last change scn: 0x163d.1bddbcfa seq: 0xff flg: 0x04
 spare1: 0x0 spare2: 0x0 spare3: 0x0
 consistency value in tail: 0xbcfa1d02
 check value in block header: 0xec11
 computed block checksum: 0xfd



DBVERIFY - 验证完成

检查的页总数: 4880
处理的页总数 (数据): 0
失败的页总数 (数据): 0
处理的页总数 (索引): 0
失败的页总数 (索引): 0
处理的页总数 (其他): 4372
处理的总页数 (段)  : 11
失败的总页数 (段)  : 0
空的页总数: 507
标记为损坏的总页数: 1
流入的页总数: 1
加密的总页数        : 0
最高块 SCN            : 467517187 (5693.467517187)

OBET> repair

Repairing block 2 in file H:\xifenfei\undo01.dbf...

Repair analysis for block 2:
1. seq_kcbh check: 0xFF -> needs repair (0x01)
2. Tailchk check: 0x021DFABC -> needs repair (0x011DFABC)
3. Checksum check: 0x11EC -> OK

Confirm repair operations:
File: H:\xifenfei\undo01.dbf
Block: 2
Operations needed: fix offset14, fix tailchk
Confirm? (Y/YES to proceed): y

Verification after repair:
1. seq_kcbh: 0x01 OK
2. Tailchk: 0x011DFABC OK
3. Checksum: 0x11EC OK

Block 2 repair completed successfully.


C:\Users\XFF>dbv file=h:/xifenfei/undo01.dbf

DBVERIFY: Release 11.2.0.4.0 - Production on 星期日 11月 16 00:07:29 2025

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

DBVERIFY - 开始验证: FILE = H:\XIFENFEI\UNDO01.DBF


DBVERIFY - 验证完成

检查的页总数: 4880
处理的页总数 (数据): 0
失败的页总数 (数据): 0
处理的页总数 (索引): 0
失败的页总数 (索引): 0
处理的页总数 (其他): 4373
处理的总页数 (段)  : 11
失败的总页数 (段)  : 0
空的页总数: 507
标记为损坏的总页数: 0
流入的页总数: 0
加密的总页数        : 0
最高块 SCN            : 467517187 (5693.467517187)