Ask Maclean

数据恢复：模拟2个逻辑坏块

TESTA:

 

Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 – 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL>
SQL>
SQL>
SQL> create table corrupt_id (t1 int) tablespace users;

Table created.

SQL>
SQL> insert into corrupt_id values(1);

1 row created.

SQL> commit;

Commit complete.

SQL> alter system checkpoint;

System altered.
SQL> select dbms_rowid.rowid_block_number(rowid),dbms_rowid.rowid_relative_fno(rowid) from corrupt_id;

DBMS_ROWID.ROWID_BLOCK_NUMBER(ROWID) DBMS_ROWID.ROWID_RELATIVE_FNO(ROWID)
———————————— ————————————
527 4
SQL> oradebug setmypid
Statement processed.

SQL> oradebug tracefile_name
/s01/diag/rdbms/fixit/FIXIT/trace/FIXIT_ora_7227.trc
Block header dump: 0x0100020f
Object id on Block? Y
seg/obj: 0x12c20 csc: 0x00.10d097 itc: 2 flg: E typ: 1 – DATA
brn: 0 bdba: 0x1000208 ver: 0x01 opc: 0
inc: 0 exflg: 0

Itl Xid Uba Flag Lck Scn/Fsc
0x01 0x0006.01f.000003e8 0x00c00c61.00a9.07 –U- 1 fsc 0x0000.0010d098
0x02 0x0000.000.00000000 0x00000000.0000.00 —- 0 fsc 0x0000.00000000
bdba: 0x0100020f
data_block_dump,data header at 0x7f15d62b2264
===============
tsiz: 0x1f98
hsiz: 0x14
pbl: 0x7f15d62b2264
76543210
flag=——–
ntab=1
nrow=1
frre=-1
fsbo=0x14
fseo=0x1f92
avsp=0x1f7b
tosp=0x1f7b
0xe:pti[0] nrow=1 offs=0
0x12:pri[0] offs=0x1f92
block_row_dump:
tab 0, row 0, @0x1f92
tl: 6 fb: –H-FL– lb: 0x1 cc: 1
col 0: [ 2] c1 02
end_of_block_dump

fsbo=0x14

FSBO Free Space Begin offset 除去row dict 后面的可以放数据的空间的起始位置，也可以看成是从这个区域的开始”flag”到最后一个 “row offs”占用的空间

fseo=0x1f92

FSEO Free Space End offset ( 9.2.0 )参与db_block_checking的计算剩余空间，select 的时候oracle不是简单的根据offset定位row.这个值也是参与了定位row的

 

 

FSBO 总是小于FSEO ，若Oracle进程读取数据块 发现FSBO>FSEO 且blocksum正确则认为出现了逻辑讹误

 
SQL> update corrupt_id set t1=t1+1;

1 row updated.

SQL> alter system checkpoint;

System altered.

SQL> alter system flush buffer_cache;

System altered.

SQL> /

System altered.

 

 

 

 
[oracle@lab1 ~]$ bbed filename=/s01/oradata/FIXIT/datafile/o1_mf_users_85ztlh77_.dbf blocksize=8192 mode=edit
Password:

BBED: Release 2.0.0.0.0 – Limited Production on Mon Sep 24 01:40:46 2012

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

************* !!! For Oracle Internal Use only !!! ***************

BBED> set block 527
BLOCK# 527

BBED> map
File: /s01/oradata/FIXIT/datafile/o1_mf_users_85ztlh77_.dbf (0)
Block: 527 Dba:0x00000000
————————————————————
KTB Data Block (Table/Cluster)

struct kcbh, 20 bytes @0

struct ktbbh, 72 bytes @20

struct kdbh, 14 bytes @100

struct kdbt[1], 4 bytes @114

sb2 kdbr[1] @118

ub1 freespace[8062] @120

ub1 rowdata[6] @8182

ub4 tailchk @8188
BBED> p *kdbr[0]
rowdata[0]
———-
ub1 rowdata[0] @8182 0x2c

BBED> set offset 8182
OFFSET 8182

BBED> x /rn
rowdata[0] @8182
———-
flag@8182: 0x2c (KDRHFL, KDRHFF, KDRHFH)
lock@8183: 0x01
cols@8184: 1

col 0[2] @8185: 3

 

 

 
BBED> p kdbh
struct kdbh, 14 bytes @100
ub1 kdbhflag @100 0x00 (NONE)
sb1 kdbhntab @101 1
sb2 kdbhnrow @102 1
sb2 kdbhfrre @104 -1
sb2 kdbhfsbo @106 20
sb2 kdbhfseo @108 8082
sb2 kdbhavsp @110 8059
sb2 kdbhtosp @112 8059

BBED> set offset 108
OFFSET 108

BBED> d
File: /s01/oradata/FIXIT/datafile/o1_mf_users_85ztlh77_.dbf (0)
Block: 527 Offsets: 108 to 619 Dba:0x00000000
————————————————————————
921f7b1f 7b1f0000 0100921f 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 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 00000000 00000000 00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000

<32 bytes per line>

BBED> x
kdbh.kdbhfseo @108
————-
0x92

BBED> modify /x 0x1000
File: /s01/oradata/FIXIT/datafile/o1_mf_users_85ztlh77_.dbf (0)
Block: 527 Offsets: 108 to 619 Dba:0x00000000
————————————————————————
10007b1f 7b1f0000 0100921f 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 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 00000000 00000000 00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000

<32 bytes per line>

BBED> p kdbh
struct kdbh, 14 bytes @100
ub1 kdbhflag @100 0x00 (NONE)
sb1 kdbhntab @101 1
sb2 kdbhnrow @102 1
sb2 kdbhfrre @104 -1
sb2 kdbhfsbo @106 20
sb2 kdbhfseo @108 16
sb2 kdbhavsp @110 8059
sb2 kdbhtosp @112 8059

BBED> sum
Check value for File 0, Block 527:
current = 0xd30a, required = 0xcc88

BBED> sum apply
Check value for File 0, Block 527:
current = 0xcc88, required = 0xcc88

 

 

 
[oracle@lab1 ~]$ dbv file=/s01/oradata/FIXIT/datafile/o1_mf_users_85ztlh77_.dbf start=526 end=528

DBVERIFY: Release 11.2.0.3.0 – Production on Mon Sep 24 01:44:36 2012

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

DBVERIFY – Verification starting : FILE = /s01/oradata/FIXIT/datafile/o1_mf_users_85ztlh77_.dbf
Block Checking: DBA = 16777743, Block Type = KTB-managed data block
data header at 0x7fa1288a9064
kdbchk: fseo(16) < fsbo(20)
Page 527 failed with check code 6130
DBVERIFY – Verification complete

Total Pages Examined : 3
Total Pages Processed (Data) : 2
Total Pages Failing (Data) : 1
Total Pages Processed (Index): 0
Total Pages Failing (Index): 0
Total Pages Processed (Other): 1
Total Pages Processed (Seg) : 0
Total Pages Failing (Seg) : 0
Total Pages Empty : 0
Total Pages Marked Corrupt : 0
Total Pages Influx : 0
Total Pages Encrypted : 0
Highest block SCN : 1102645 (0.1102645)
SQL> shutdown abort;
ORACLE instance shut down.
RMAN> backup validate check logical datafile 4;

Starting backup at 24-SEP-12
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=139 device type=DISK
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00004 name=/s01/oradata/FIXIT/datafile/o1_mf_users_85ztlh77_.dbf
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
List of Datafiles
=================
File Status Marked Corrupt Empty Blocks Blocks Examined High SCN
—- —— ————– ———— ————— ———-
4 FAILED 0 18 668 1101975
File Name: /s01/oradata/FIXIT/datafile/o1_mf_users_85ztlh77_.dbf
Block Type Blocks Failing Blocks Processed
———- ————– —————-
Data 1 96
Index 0 39
Other 0 487

validate found one or more corrupt blocks
See trace file /s01/diag/rdbms/fixit/FIXIT/trace/FIXIT_ora_8036.trc for details
Finished backup at 24-SEP-12

Block Checking: DBA = 16777743, Block Type = KTB-managed data block
data header at 0x7f00bc1f6064
kdbchk: fseo(16) < fsbo(20)
Error backing up file 4, block 527: logical corruption
dbkh_create_finding: BEGIN
dbkhu_prepare_default_msgobj: BEGIN
dbkhu_prepare_default_msgobj:; name_id=25, type=2, flags=1
dbkhu_get_default_msg_def: BEGIN
dbkhu_get_default_msg_def: END
dbkhu_prepare_default_msgobj:: MSG PARAMS-1; i=2
dbkhu_prepare_default_msgobj: END
dbkhu_prepare_default_msgobj: BEGIN
dbkhu_prepare_default_msgobj:; name_id=25, type=2, flags=2
dbkhu_get_default_msg_def: BEGIN
dbkhu_get_default_msg_def: END
dbkhu_prepare_default_msgobj:: MSG PARAMS-2; i=1
dbkhu_prepare_default_msgobj: END

*** 2012-09-24 01:48:25.079
dbkhu_prepare_default_msgobj: BEGIN
dbkhu_prepare_default_msgobj:; name_id=38, type=2, flags=1
dbkhu_get_default_msg_def: BEGIN
dbkhu_get_default_msg_def: END
dbkhu_prepare_default_msgobj:: MSG PARAMS-1; i=3
dbkhu_prepare_default_msgobj: END
dbkhu_prepare_default_msgobj: BEGIN
dbkhu_prepare_default_msgobj:; name_id=38, type=2, flags=2
dbkhu_get_default_msg_def: BEGIN
dbkhu_get_default_msg_def: END
dbkhu_prepare_default_msgobj:: MSG PARAMS-2; i=2
dbkhu_prepare_default_msgobj: END
dbkh_create_finding: END

 

kdbchk: fseo(16) < fsbo(20)
Page 527 failed with check code 6130 可能引起

以下错误：

ORA-07445: exception encountered: core dump [kghstack_err+0068] [SIGSEGV] [Address not mapped to object] [0x778670101010109] [] []
ORA-00607: Internal error occurred while making a change to a data block
ORA-00602: internal programming exception
ORA-07445: exception encountered: core dump [kghstack_err+0068] [SIGSEGV] [Address not mapped to object] [0x778670101010109] [] []
ORA-00607: Internal error occurred while making a change to a data block
ORA-00602: internal programming exception
ORA-07445: exception encountered: core dump [kghstack_err+0068] [SIGSEGV] [Address not mapped to object] [0x778670101010109] [] []
ORA-00600: internal error code, arguments: [kghstack_free2], [], [], [], [], [], [], []

 

 

TESTB:

 

SQL*Plus: Release 10.2.0.5.0 – Production on Mon Sep 24 09:30:18 2012

Copyright (c) 1982, 2010, Oracle. All Rights Reserved.

Connected to an idle instance.

SQL> startup;
ORACLE instance started.

Total System Global Area 1048576000 bytes
Fixed Size 2101544 bytes
Variable Size 738201304 bytes
Database Buffers 301989888 bytes
Redo Buffers 6283264 bytes
Database mounted.
Database opened.

 

SQL> create table corrupt_id (t1 int) tablespace users;

Table created.

SQL> insert into corrupt_id values(1);

1 row created.

SQL> commit;

Commit complete.

SQL> alter system checkpoint;

System altered.

SQL> select dbms_rowid.rowid_block_number(rowid),dbms_rowid.rowid_relative_fno(rowid) from corrupt_id;

DBMS_ROWID.ROWID_BLOCK_NUMBER(ROWID) DBMS_ROWID.ROWID_RELATIVE_FNO(ROWID)
———————————— ————————————
917060 4

SQL> alter system dump datafile 4 block 917060;

System altered.

SQL> oradebug setmypid
Statement processed.
SQL> oradebug tracefile_name
/s01/admin/G10R25/udump/g10r25_ora_4497.trc
Block header dump: 0x010dfe44
Object id on Block? Y
seg/obj: 0xf0e4 csc: 0x00.17d1aac itc: 2 flg: E typ: 1 – DATA
brn: 0 bdba: 0x10dfe41 ver: 0x01 opc: 0
inc: 0 exflg: 0

Itl Xid Uba Flag Lck Scn/Fsc
0x01 0x0009.00c.0000515d 0x008001c2.1138.08 –U- 1 fsc 0x0000.017d1ab2
0x02 0x0000.000.00000000 0x00000000.0000.00 —- 0 fsc 0x0000.00000000

data_block_dump,data header at 0x82d8864
===============
tsiz: 0x1f98
hsiz: 0x14
pbl: 0x082d8864
bdba: 0x010dfe44
76543210
flag=——–
ntab=1
nrow=1
frre=-1
fsbo=0x14
fseo=0x1f92
avsp=0x1f7b
tosp=0x1f7b
0xe:pti[0] nrow=1 offs=0
0x12:pri[0] offs=0x1f92
block_row_dump:
tab 0, row 0, @0x1f92
tl: 6 fb: –H-FL– lb: 0x1 cc: 1
col 0: [ 2] c1 02
end_of_block_dump
End dump data blocks tsn: 4 file#: 4 minblk 917060 maxblk 917060

 

fsbo=0x14

FSBO Free Space Begin offset 除去row dict 后面的可以放数据的空间的起始位置，也可以看成是从这个区域的开始”flag”到最后一个 “row offs”占用的空间

fseo=0x1f92

FSEO Free Space End offset ( 9.2.0 )参与db_block_checking的计算剩余空间，select 的时候oracle不是简单的根据offset定位row.这个值也是参与了定位row的

 

 

 

 

FSBO 总是小于FSEO ，若Oracle进程读取数据块 发现FSBO>FSEO 且blocksum正确则认为出现了逻辑讹误

 

 

SQL> update corrupt_id set t1=t1+1;

1 row updated.

SQL> alter system checkpoint;

System altered.

SQL> alter system flush buffer_cache;

System altered.

SQL> /

System altered.

 

 

 

 

 

 

[oracle@vrh8 ~]$ bbed filename=/s01/oradata/G10R25/datafile/o1_mf_users_7ch7d4nx_.dbf blocksize=8192 mode=edit
Password:

 

BBED> set block 917060
BLOCK# 917060

BBED> map
File: /s01/oradata/G10R25/datafile/o1_mf_users_7ch7d4nx_.dbf (0)
Block: 917060 Dba:0x00000000
————————————————————
KTB Data Block (Table/Cluster)

struct kcbh, 20 bytes @0

struct ktbbh, 72 bytes @20

struct kdbh, 14 bytes @100

struct kdbt[1], 4 bytes @114

sb2 kdbr[1] @118

ub1 freespace[8062] @120

ub1 rowdata[6] @8182

ub4 tailchk @8188
BBED> p kdbh
struct kdbh, 14 bytes @100
ub1 kdbhflag @100 0x00 (NONE)
b1 kdbhntab @101 1
b2 kdbhnrow @102 1
sb2 kdbhfrre @104 -1
sb2 kdbhfsbo @106 20
sb2 kdbhfseo @108 8082
b2 kdbhavsp @110 8059
b2 kdbhtosp @112 8059

BBED> p *kdbr[0]
rowdata[0]
———-
ub1 rowdata[0] @8182 0x2c

BBED> set offset 8182
OFFSET 8182

BBED> x /rn
rowdata[0] @8182
———-
flag@8182: 0x2c (KDRHFL, KDRHFF, KDRHFH)
lock@8183: 0x02
cols@8184: 1

col 0[2] @8185: 2
BBED> set offset 108
OFFSET 108

BBED> d
File: /s01/oradata/G10R25/datafile/o1_mf_users_7ch7d4nx_.dbf (0)
Block: 917060 Offsets: 108 to 619 Dba:0x00000000
————————————————————————
921f7b1f 7b1f0000 0100921f 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 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 00000000 00000000 00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000

<32 bytes per line>

BBED> modify /x 0x3d00
Warning: contents of previous BIFILE will be lost. Proceed? (Y/N) y
File: /s01/oradata/G10R25/datafile/o1_mf_users_7ch7d4nx_.dbf (0)
Block: 917060 Offsets: 108 to 619 Dba:0x00000000
————————————————————————
3d007b1f 7b1f0000 0100921f 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 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 00000000 00000000 00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000

<32 bytes per line>

BBED> p kdbh
struct kdbh, 14 bytes @100
ub1 kdbhflag @100 0x00 (NONE)
b1 kdbhntab @101 1
b2 kdbhnrow @102 1
sb2 kdbhfrre @104 -1
sb2 kdbhfsbo @106 20
sb2 kdbhfseo @108 61
b2 kdbhavsp @110 8059
b2 kdbhtosp @112 8059

BBED> set offset 106
OFFSET 106

BBED> modify /x 0x4000
File: /s01/oradata/G10R25/datafile/o1_mf_users_7ch7d4nx_.dbf (0)
Block: 917060 Offsets: 106 to 617 Dba:0x00000000
————————————————————————
40003d00 7b1f7b1f 00000100 921f0000 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 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 00000000 00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000

<32 bytes per line>

BBED> p kdbh
struct kdbh, 14 bytes @100
ub1 kdbhflag @100 0x00 (NONE)
b1 kdbhntab @101 1
b2 kdbhnrow @102 1
sb2 kdbhfrre @104 -1
sb2 kdbhfsbo @106 64
sb2 kdbhfseo @108 61
b2 kdbhavsp @110 8059
b2 kdbhtosp @112 8059

BBED> sum
Check value for File 0, Block 917060:
current = 0x52c9, required = 0x4d32

BBED> sum apply
Check value for File 0, Block 917060:
current = 0x4d32, required = 0x4d32

[oracle@vrh8 ~]$ dbv file=/s01/oradata/G10R25/datafile/o1_mf_users_7ch7d4nx_.dbf start=917059 end=917060

DBVERIFY: Release 10.2.0.5.0 – Production on Mon Sep 24 10:11:16 2012

Copyright (c) 1982, 2007, Oracle. All rights reserved.

DBVERIFY – Verification starting : FILE = /s01/oradata/G10R25/datafile/o1_mf_users_7ch7d4nx_.dbf
Block Checking: DBA = 17694276, Block Type = KTB-managed data block
data header at 0x7f49e04e8064
kdbchk: fsbo(64) wrong, (hsz 20)
Page 917060 failed with check code 6129
DBVERIFY – Verification complete

Total Pages Examined : 2
Total Pages Processed (Data) : 1
Total Pages Failing (Data) : 1
Total Pages Processed (Index): 0
Total Pages Failing (Index): 0
Total Pages Processed (Other): 1
Total Pages Processed (Seg) : 0
Total Pages Failing (Seg) : 0
Total Pages Empty : 0
Total Pages Marked Corrupt : 0
Total Pages Influx : 0
Highest block SCN : 24976162 (0.24976162)

 

 

Posted

in

by

mac

Tags:

Comments

One response to “数据恢复：模拟2个逻辑坏块”

  1. Oracle数据恢复专题 – ORACLE数据库数据恢复、性能优化、故障诊断来问问MACLEAN

    […] 数据恢复：模拟2个逻辑坏块 […]

    Reply

Leave a Reply

Your email address will not be published. Required fields are marked *