测试环境请参见
使用BBED手工提交事务
尝试恢复delete的数据：
BBED> modify /x 2c offset 5064
File: /data/orcl/orcl/users01.dbf (4)
Block: 68 Offsets: 5064 to 5071 Dba:0x01000044
------------------------------------------------------------------------
2c000d03 53595305
<32 bytes per line>
BBED> sum apply
Check value for File 4, Block 68:
current = 0xf95f, required = 0xf95f
BBED> verify
DBVERIFY - Verification starting
FILE = /data/orcl/orcl/users01.dbf
BLOCK = 68
Block Checking: DBA = 16777284, Block Type= KTB-managed data block
data header at 0x1070fa7c
kdbchk: the amount of space used is notequal to block size
used=7190 fsc=0 avsp=946 dtl=8064
Block 68 failed with check code 6110
DBVERIFY - Verification complete
Total Blocks Examined : 1
Total Blocks Processed (Data) : 1
Total Blocks Failing (Data) : 1
Total Blocks Processed (Index): 0
Total Blocks Failing (Index): 0
Total Blocks Empty : 0
Total Blocks Marked Corrupt : 0
Total Blocks Influx : 0
8064-7190=874 -->036A -->6a03
BBED> p kdbhavsp
b2 kdbhavsp @134 946
BBED> modify /x 6a03 offset 134
File: /data/orcl/orcl/users01.dbf (4)
Block: 68 Offsets: 134 to 141 Dba:0x01000044
------------------------------------------------------------------------
6a03b403 00005b00
<32 bytes per line>
BBED> sum apply
Check value for File 4, Block 68:
current = 0xf987, required = 0xf987
BBED> verify
DBVERIFY - Verification starting
FILE = /data/orcl/orcl/users01.dbf
BLOCK = 68
Block Checking: DBA = 16777284, Block Type= KTB-managed data block
data header at 0x1070fa7c
kdbchk: space available on commit isincorrect
tosp=948 fsc=0 stb=0 avsp=874 --kdbchk: space availableon commit is incorrect
Block 68 failed with check code 6111
DBVERIFY - Verification complete
Total Blocks Examined : 1
Total Blocks Processed (Data) : 1
Total Blocks Failing (Data) : 1
Total Blocks Processed (Index): 0
Total Blocks Failing (Index): 0
Total Blocks Empty : 0
Total Blocks Marked Corrupt : 0
Total Blocks Influx : 0
把tosp和avsp修改为一致就可以了
BBED> modify /x 6a036a03
File: /data/orcl/orcl/users01.dbf (4)
Block: 68 Offsets: 134 to 141 Dba:0x01000044
------------------------------------------------------------------------
6a036a03 00005b00
<32 bytes per line>
BBED> sum apply
Check value for File 4, Block 68:
current = 0xf959, required = 0xf959
BBED> verify
DBVERIFY - Verification starting
FILE = /data/orcl/orcl/users01.dbf
BLOCK = 68
DBVERIFY - Verification complete
Total Blocks Examined : 1
Total Blocks Processed (Data) : 1
Total Blocks Failing (Data) : 0
Total Blocks Processed (Index): 0
Total Blocks Failing (Index): 0
Total Blocks Empty : 0
Total Blocks Marked Corrupt : 0
Total Blocks Influx : 0
查询数据，看删除的数据找回来了。
BBED> p *kdbr[40]
rowdata[3866]
-------------
ub1 rowdata[3866] @5064 0x2c
BBED> x /rnccccccccccccccc
rowdata[3866] @5064
-------------
[email protected]: 0x2c (KDRHFL, KDRHFF, KDRHFH)
[email protected]: 0x00
[email protected]: 13
col 0[3] @5067: -0
col 1[5] @5071: USER$
col 2[0] @5077: *NULL*
col 3[2] @5078: ..
col 4[2] @5081: ..
col 5[5] @5084: TABLE
col 6[7] @5090: xl...(1
col 7[7] @5098: xl....,
col 8[19] @5106: 2008-03-12:00:39:48
col 9[5] @5126: VALID
col 10[1] @5132: N
col 11[1] @5134: N
col 12[1] @5136: N
SQL> alter system flush buffer_cache;
System altered.
SQL> select count(*) from tt_trans;
COUNT(*)
----------
399