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bbed简单替换block测试

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Jun 07, 2016 pm 04:39 PM

Blockc提问替换朋友测试简单论坛

有朋友在我论坛中提问copy一个块，如何在前台显示其中数据,前段时间比较忙,没有及时答复该问题,今天通过试验方式进行了测试说明,本试验简单,仅是同一个数据文件中的同一个对象中的两个block进行了替换创建测试表 SQL conn chf/xifenfeiConnected.SQL create

有朋友在我论坛中提问copy一个块，如何在前台显示其中数据,前段时间比较忙,没有及时答复该问题,今天通过试验方式进行了测试说明,本试验简单,仅是同一个数据文件中的同一个对象中的两个block进行了替换
创建测试表

SQL> conn chf/xifenfei
Connected.
SQL> create table t_xifenfei as select * from dba_objects;
Table created.
SQL> select EXTENT_ID,FILE_ID,BLOCK_ID,BLOCKS from dba_extents where segment_name='T_XIFENFEI' AND OWNER='CHF';
 EXTENT_ID    FILE_ID   BLOCK_ID     BLOCKS
---------- ---------- ---------- ----------
         0          4        176          8
         1          4        184          8
         2          4        192          8
         3          4        200          8
         4          4        208          8
         5          4        216          8
         6          4        224          8
         7          4        232          8
         8          4        240          8
         9          4        248          8
        10          4        256          8
 EXTENT_ID    FILE_ID   BLOCK_ID     BLOCKS
---------- ---------- ---------- ----------
        11          4        264          8
        12          4        272          8
        13          4        280          8
        14          4        288          8
        15          4        296          8
        16          4        384        128
        17          4        512        128
        18          4        640        128
        19          4        768        128
        20          4        896        128
        21          4       1024        128
 EXTENT_ID    FILE_ID   BLOCK_ID     BLOCKS
---------- ---------- ---------- ----------
        22          4       1152        128
        23          4       1280        128
        24          4       1408        128
25 rows selected.
SQL>  select * from (select distinct dbms_rowid.rowid_relative_fno(rowid), 
  2  dbms_rowid.rowid_block_number(rowid) from t_xifenfei ORDER BY 2 )where rownum
<p><strong>查询file 4 block 180 数据情况</strong></p>
<pre class="brush:php;toolbar:false">
SQL> select object_id from t_xifenfei where  dbms_rowid.rowid_relative_fno(rowid)=4 
    2 and dbms_rowid.rowid_block_number(rowid)=180;
 OBJECT_ID
----------
        81
        82
        83
        84
        85
        86
        87
        88
        89
        90
        91
 OBJECT_ID
----------
        92
        93
        94
        95
        96
        97
        98
        99
       100
       101
       102
 OBJECT_ID
----------
       103
       104
       105
       106
       107
       108
       109
       110
       111
       112
       113
 OBJECT_ID
----------
       114
       115
       116
       117
       118
       119
       120
       121
       122
       123
       124
 OBJECT_ID
----------
       125
       126
       127
       129
       128
       130
       131
       132
       133
       134
       135
 OBJECT_ID
----------
       137
       136
       138
       139
       140
       141
       142
       143
       144
       145
       146
 OBJECT_ID
----------
       147
       148
       149
       150
       151
       153
       152
       154
       155
       156
76 rows selected.

查询file 4 block 181 数据情况

SQL> select object_id from t_xifenfei where  dbms_rowid.rowid_relative_fno(rowid)=4 
   2 and dbms_rowid.rowid_block_number(rowid)=181;
 OBJECT_ID
----------
       157
       158
       159
       160
       161
       162
       163
       164
       165
       166
       167
 OBJECT_ID
----------
       168
       169
       170
       171
       172
       173
       174
       175
       176
       177
       178
 OBJECT_ID
----------
       179
       180
       181
       182
       183
       184
       185
       186
       187
       188
       189
 OBJECT_ID
----------
       190
       191
       192
       193
       194
       195
       196
       197
       198
       199
       200
 OBJECT_ID
----------
       201
       202
       203
       204
       205
       206
       208
       207
       209
       210
       211
 OBJECT_ID
----------
       212
       213
       214
       215
       216
       217
       218
       219
       220
       221
       222
 OBJECT_ID
----------
       223
       224
       225
       226
       227
       228
       229
       230
       231
75 rows selected.

定位file 4 文件名

SQL> select name from v$datafile where file#=4;
NAME
--------------------------------------------------------------------------------
/u01/app/oracle/oradata/ORCL/users01.dbf

bbed 替换file 4 block 180到file 4 block 181

[oracle@oel6 ~]$ bbed filename='/u01/app/oracle/oradata/ORCL/users01.dbf' mode=edit blocksize=8192
Password: 
BBED: Release 2.0.0.0.0 - Limited Production on Wed Aug 6 21:17:11 2014
Copyright (c) 1982, 2013, Oracle and/or its affiliates.  All rights reserved.
************* !!! For Oracle Internal Use only !!! ***************
BBED> show all
        FILE#           0
        BLOCK#          1
        OFFSET          0
        DBA             0x00000000 (0 0,1)
        FILENAME        /u01/app/oracle/oradata/ORCL/users01.dbf
        BIFILE          bifile.bbd
        LISTFILE       
        BLOCKSIZE       8192
        MODE            Edit
        EDIT            Unrecoverable
        IBASE           Dec
        OBASE           Dec
        WIDTH           80
        COUNT           512
        LOGFILE         log.bbd
        SPOOL           No
BBED> map
 File: /u01/app/oracle/oradata/ORCL/users01.dbf (0)
 Block: 180                                   Dba:0x00000000
------------------------------------------------------------
 KTB Data Block (Table/Cluster)
 struct kcbh, 20 bytes                      @0       
 struct ktbbh, 96 bytes                     @20      
 struct kdbh, 14 bytes                      @124     
 struct kdbt[1], 4 bytes                    @138     
 sb2 kdbr[76]                               @142     
 ub1 freespace[856]                         @294     
 ub1 rowdata[7038]                          @1150    
 ub4 tailchk                                @8188    
BBED> p kcbh
struct kcbh, 20 bytes                       @0       
   ub1 type_kcbh                            @0        0x06
   ub1 frmt_kcbh                            @1        0xa2
   ub1 spare1_kcbh                          @2        0x00
   ub1 spare2_kcbh                          @3        0x00
   ub4 rdba_kcbh                            @4        0x010000b4
   ub4 bas_kcbh                             @8        0x000b258a
   ub2 wrp_kcbh                             @12       0x0000
   ub1 seq_kcbh                             @14       0x02
   ub1 flg_kcbh                             @15       0x04 (KCBHFCKV)
   ub2 chkval_kcbh                          @16       0x0eb6
   ub2 spare3_kcbh                          @18       0x0000
BBED> p kcbh block 181           
struct kcbh, 20 bytes                       @0       
   ub1 type_kcbh                            @0        0x06
   ub1 frmt_kcbh                            @1        0xa2
   ub1 spare1_kcbh                          @2        0x00
   ub1 spare2_kcbh                          @3        0x00
   ub4 rdba_kcbh                            @4        0x010000b5
   ub4 bas_kcbh                             @8        0x000b258a
   ub2 wrp_kcbh                             @12       0x0000
   ub1 seq_kcbh                             @14       0x02
   ub1 flg_kcbh                             @15       0x04 (KCBHFCKV)
   ub2 chkval_kcbh                          @16       0xa1c5
   ub2 spare3_kcbh                          @18       0x0000
BBED> copy block 180 to block 181
 File: /u01/app/oracle/oradata/ORCL/users01.dbf (0)
 Block: 181              Offsets:    0 to  511           Dba:0x00000000
------------------------------------------------------------------------
 06a20000 b4000001 8a250b00 00000204 b60e0000 01000000 252d0100 84250b00 
 00000000 03003200 b0000001 ffff0000 00000000 00000000 00000000 00800000 
 84250b00 00000000 00000000 00000000 00000000 00000000 00000000 00000000 
 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00014c00 
 ffffaa00 02045803 58030000 4c00221f c21e661e 0e1eb01d 521df81c 9e1c421c 
 ea1b901b 361be11a 8c1a361a da198019 2419c818 73181918 b9176017 0717ae16 
 5416f815 a2154915 f0149614 3914dc13 7f131f13 c8126e12 1412ba11 61110511 
 a9104f10 f20f900f 370fdc0e 710e070e a60d430d df0c850c 2a0ccf0b 640bfa0a 
 9d0a400a e6098509 2e09d408 79081e08 c3076607 0907a206 3806e005 75050b05 
 b0045a04 02040000 00000000 00000000 00000000 00000000 00000000 00000000 
 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 
 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 
 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 
 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 
 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 
 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 
BBED> p kcbh block 181
struct kcbh, 20 bytes                       @0       
   ub1 type_kcbh                            @0        0x06
   ub1 frmt_kcbh                            @1        0xa2
   ub1 spare1_kcbh                          @2        0x00
   ub1 spare2_kcbh                          @3        0x00
   ub4 rdba_kcbh                            @4        0x010000b4
   ub4 bas_kcbh                             @8        0x000b258a
   ub2 wrp_kcbh                             @12       0x0000
   ub1 seq_kcbh                             @14       0x02
   ub1 flg_kcbh                             @15       0x04 (KCBHFCKV)
   ub2 chkval_kcbh                          @16       0x0eb6
   ub2 spare3_kcbh                          @18       0x0000
BBED> p rdba_kcbh
ub4 rdba_kcbh                               @4        0x010000b4
BBED> d
 File: /u01/app/oracle/oradata/ORCL/users01.dbf (0)
 Block: 181              Offsets:    4 to  515           Dba:0x00000000
------------------------------------------------------------------------
 b4000001 8a250b00 00000204 b60e0000 01000000 252d0100 84250b00 00000000 
 03003200 b0000001 ffff0000 00000000 00000000 00000000 00800000 84250b00 
 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 
 00000000 00000000 00000000 00000000 00000000 00000000 00014c00 ffffaa00 
 02045803 58030000 4c00221f c21e661e 0e1eb01d 521df81c 9e1c421c ea1b901b 
 361be11a 8c1a361a da198019 2419c818 73181918 b9176017 0717ae16 5416f815 
 a2154915 f0149614 3914dc13 7f131f13 c8126e12 1412ba11 61110511 a9104f10 
 f20f900f 370fdc0e 710e070e a60d430d df0c850c 2a0ccf0b 640bfa0a 9d0a400a 
 e6098509 2e09d408 79081e08 c3076607 0907a206 3806e005 75050b05 b0045a04 
 02040000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 
 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 
 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 
 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 
 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 
 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 
 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 
BBED> set count 32
        COUNT           32
BBED> d
 File: /u01/app/oracle/oradata/ORCL/users01.dbf (0)
 Block: 181              Offsets:    4 to   35           Dba:0x00000000
------------------------------------------------------------------------
 b4000001 8a250b00 00000204 b60e0000 01000000 252d0100 84250b00 00000000 
BBED> m /x b5
 File: /u01/app/oracle/oradata/ORCL/users01.dbf (0)
 Block: 181              Offsets:    4 to   35           Dba:0x00000000
------------------------------------------------------------------------
 b5000001 8a250b00 00000204 b60e0000 01000000 252d0100 84250b00 00000000 
BBED> sum apply
Check value for File 0, Block 181:
current = 0x0eb7, required = 0x0eb7
BBED> p kcbh block 181
struct kcbh, 20 bytes                       @0       
   ub1 type_kcbh                            @0        0x06
   ub1 frmt_kcbh                            @1        0xa2
   ub1 spare1_kcbh                          @2        0x00
   ub1 spare2_kcbh                          @3        0x00
   ub4 rdba_kcbh                            @4        0x010000b5
   ub4 bas_kcbh                             @8        0x000b258a
   ub2 wrp_kcbh                             @12       0x0000
   ub1 seq_kcbh                             @14       0x02
   ub1 flg_kcbh                             @15       0x04 (KCBHFCKV)
   ub2 chkval_kcbh                          @16       0x0eb7
   ub2 spare3_kcbh                          @18       0x0000

验证替换后的file 4 block 181

SQL>  select object_id from t_xifenfei where  dbms_rowid.rowid_relative_fno(rowid)=4
   2  and dbms_rowid.rowid_block_number(rowid)=181;
 OBJECT_ID
----------
        81
        82
        83
        84
        85
        86
        87
        88
        89
        90
        91
 OBJECT_ID
----------
        92
        93
        94
        95
        96
        97
        98
        99
       100
       101
       102
 OBJECT_ID
----------
       103
       104
       105
       106
       107
       108
       109
       110
       111
       112
       113
 OBJECT_ID
----------
       114
       115
       116
       117
       118
       119
       120
       121
       122
       123
       124
 OBJECT_ID
----------
       125
       126
       127
       129
       128
       130
       131
       132
       133
       134
       135
 OBJECT_ID
----------
       137
       136
       138
       139
       140
       141
       142
       143
       144
       145
       146
 OBJECT_ID
----------
       147
       148
       149
       150
       151
       153
       152
       154
       155
       156
76 rows selected.

通过替换block 180的block到181,查询block 181和180数据相同,证明替换block成功

dd操作数据文件
在UltraEdit中定位数据文件内容
系统中数据文件第一个数据块和oracle 中第一个数据块关系
使用bbed修复损坏datafile header
bbed模拟提交事务一之修改itl
记录因磁盘头被重写,抢救redo恢复经历
bbed处理ORA-01200故障
bbed模拟提交事务二之屏蔽smon回滚事务

原文地址：bbed简单替换block测试, 感谢原作者分享。

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