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)
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原文链接：https://blog.csdn.net/xifenfei/article/details/154917706