标签归档:bbed修复坏块

csc higher than block scn类型坏块修复

数据库虽然正常open了,但是由于system有坏块,导致数据库导出有部分表报错,客户希望通过修复坏块完美解决该问题
exp-ORA-1578


bbed检查system报坏块

C:\Users\FAL>dbv file=D:\BAIDUYUNDOWNLOAD\ORADATA\CHEASDB\SYSTEM01.DBF

DBVERIFY: Release 11.2.0.1.0 - Production on 星期六 5月 14 15:40:55 2016

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.

DBVERIFY - 开始验证: FILE = D:\BAIDUYUNDOWNLOAD\ORADATA\CHEASDB\SYSTEM01.DBF
csc(0x0000.1f8adab3) higher than block scn(0x0000.00000000)
页 122146 失败, 校验代码为 6054


DBVERIFY - 验证完成

检查的页总数: 252160
处理的页总数 (数据): 178921
失败的页总数 (数据): 0
处理的页总数 (索引): 52576
失败的页总数 (索引): 1
处理的页总数 (其他): 3201
处理的总页数 (段)  : 1
失败的总页数 (段)  : 0
空的页总数: 17462
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            : 529420540 (0.529420540)

bbed修复坏块

C:\Users\FAL>bbed password=blockedit filename=D:\BAIDUYUNDOWNLOAD\ORADATA\CHEASDB\SYSTEM01.DBF

BBED: Release 2.0.0.0.0 - Limited Production on Sat May 14 15:37:01 2016

Copyright (c) 1982, 2002, Oracle Corporation.  All rights reserved.

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

BBED> set blocksize 8192
        BLOCKSIZE       8192

BBED> set block 2
        BLOCK#          2

BBED> map
 File: D:\BAIDUYUNDOWNLOAD\ORADATA\CHEASDB\SYSTEM01.DBF (0)
 Block: 2                                     Dba:0x00000000
------------------------------------------------------------
 Data File Header

 struct kcvfh, 360 bytes                    @0

 ub4 tailchk                                @8188


BBED> set block 122147
        BLOCK#          122147

BBED> map
 File: D:\BAIDUYUNDOWNLOAD\ORADATA\CHEASDB\SYSTEM01.DBF (0)
 Block: 122147                                Dba:0x00000000
------------------------------------------------------------
 KTB Data Block (Index Leaf)

 struct kcbh, 20 bytes                      @0

 struct ktbbh, 3720 bytes                   @20

 struct kdxle, 32 bytes                     @3740

 b2 kd_off[188]                             @3772

 ub1 freespace[1534]                        @4148

 ub1 rowdata[2442]                          @5682

 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        0x0041dd22
   ub4 bas_kcbh                             @8        0x00000000
   ub2 wrp_kcbh                             @12       0x0000
   ub1 seq_kcbh                             @14       0xff
   ub1 flg_kcbh                             @15       0x04 (KCBHFCKV)
   ub2 chkval_kcbh                          @16       0x6cee
   ub2 spare3_kcbh                          @18       0x0000

BBED> verify
DBVERIFY - Verification starting
FILE = D:\BAIDUYUNDOWNLOAD\ORADATA\CHEASDB\SYSTEM01.DBF
BLOCK = 122146

Block Checking: DBA = 4316450, Block Type = KTB-managed data block
Found block already marked corrupted

DBVERIFY - Verification complete

Total Blocks Examined         : 1
Total Blocks Processed (Data) : 0
Total Blocks Failing   (Data) : 0
Total Blocks Processed (Index): 1
Total Blocks Failing   (Index): 0
Total Blocks Empty            : 0
Total Blocks Marked Corrupt   : 0
Total Blocks Influx           : 0

BBED> set offset 8188
        OFFSET          8188

BBED> map
 File: D:\BAIDUYUNDOWNLOAD\ORADATA\CHEASDB\SYSTEM01.DBF (0)
 Block: 122147                                Dba:0x00000000
------------------------------------------------------------
 KTB Data Block (Index Leaf)

 struct kcbh, 20 bytes                      @0

 struct ktbbh, 3720 bytes                   @20

 struct kdxle, 32 bytes                     @3740

 b2 kd_off[188]                             @3772

 ub1 freespace[1534]                        @4148

 ub1 rowdata[2442]                          @5682

 ub4 tailchk                                @8188


BBED> d
 File: D:\BAIDUYUNDOWNLOAD\ORADATA\CHEASDB\SYSTEM01.DBF (0)
 Block: 122147           Offsets: 8188 to 8191           Dba:0x00000000
------------------------------------------------------------------------
 ff060000

 <32 bytes per line>


BBED> set mode edit
        MODE            Edit

BBED> m /x 01 offset 14
 File: D:\BAIDUYUNDOWNLOAD\ORADATA\CHEASDB\SYSTEM01.DBF (0)
 Block: 122147           Offsets:   14 to  525           Dba:0x00000000
------------------------------------------------------------------------
 0104ee6c 00000200 00003500 0000b3da 8a1f0000 00009a00 030021dd 41000900
 0700443d 0600531c c000628b 010000c0 00002c3f 5a1f0300 0000ca5e 05002b0a
 c0008685 01000080 000073d7 8a1f0400 200057a2 0500d530 c000a88e 2c000080
 0000b3d7 8a1f0a00 01002848 08001101 c00084be 29000080 0000e3d7 8a1f0800
 0d00d612 06008f0a c000258d 3c000080 000026d8 8a1f0100 1f0063c1 04006007
 c0002887 4b000080 000046d8 8a1f0700 1e005403 0600a707 c000bd8e 40000080
 00006bd8 8a1f0a00 0b000c48 08001301 c00084be 41000080 0000a2d8 8a1f0600
 1b0055e6 0500c508 c0000f8b 23000080 0000fad8 8a1f0300 0600ca5e 0500220a
 c0008685 34000080 000040d9 8a1f0800 1300d412 0600900a c000258d 2e000080
 000064d9 8a1f0600 0b0092e6 0500c608 c0000f8b 1c000080 000089d9 8a1f0a00
 05001d48 08001401 c00084be 05000080 0000aed9 8a1f0400 100030a2 0500d730
 c000a88e 0e000080 000016da 8a1f0800 1700c712 0600910a c000258d 33000080
 000022da 8a1f0200 1100450d 0500930c c000c085 28000080 00002fda 8a1f0200
 0800610d 0500940c c000c085 20000080 00004eda 8a1f0700 12003303 0600aa07
 c000bd8e 0a000120 0f00b7da 8a1f0a00 13000048 08001501 c00084be 07000220
 1e00f5da 8a1f0900 07000b44 0600650f c000968d 05000120 0f0004db 8a1f0300

 <32 bytes per line>

BBED> sum apply
Check value for File 0, Block 122147:
current = 0x6cee, required = 0x6cee

BBED> verify
DBVERIFY - Verification starting
FILE = D:\BAIDUYUNDOWNLOAD\ORADATA\CHEASDB\SYSTEM01.DBF
BLOCK = 122146


DBVERIFY - Verification complete

Total Blocks Examined         : 1
Total Blocks Processed (Data) : 0
Total Blocks Failing   (Data) : 0
Total Blocks Processed (Index): 1
Total Blocks Failing   (Index): 0
Total Blocks Empty            : 0
Total Blocks Marked Corrupt   : 0
Total Blocks Influx           : 0


BBED> m /x c1da8a1f offset 8
 File: D:\BAIDUYUNDOWNLOAD\ORADATA\CHEASDB\SYSTEM01.DBF (0)
 Block: 122147           Offsets:    8 to  519           Dba:0x00000000
------------------------------------------------------------------------
 c1da8a1f 00000104 ee6c0000 02000000 35000000 b3da8a1f 00000000 9a000300
 21dd4100 09000700 443d0600 531cc000 628b0100 00c00000 2c3f5a1f 03000000
 ca5e0500 2b0ac000 86850100 00800000 73d78a1f 04002000 57a20500 d530c000
 a88e2c00 00800000 b3d78a1f 0a000100 28480800 1101c000 84be2900 00800000
 e3d78a1f 08000d00 d6120600 8f0ac000 258d3c00 00800000 26d88a1f 01001f00
 63c10400 6007c000 28874b00 00800000 46d88a1f 07001e00 54030600 a707c000
 bd8e4000 00800000 6bd88a1f 0a000b00 0c480800 1301c000 84be4100 00800000
 a2d88a1f 06001b00 55e60500 c508c000 0f8b2300 00800000 fad88a1f 03000600
 ca5e0500 220ac000 86853400 00800000 40d98a1f 08001300 d4120600 900ac000
 258d2e00 00800000 64d98a1f 06000b00 92e60500 c608c000 0f8b1c00 00800000
 89d98a1f 0a000500 1d480800 1401c000 84be0500 00800000 aed98a1f 04001000
 30a20500 d730c000 a88e0e00 00800000 16da8a1f 08001700 c7120600 910ac000
 258d3300 00800000 22da8a1f 02001100 450d0500 930cc000 c0852800 00800000
 2fda8a1f 02000800 610d0500 940cc000 c0852000 00800000 4eda8a1f 07001200
 33030600 aa07c000 bd8e0a00 01200f00 b7da8a1f 0a001300 00480800 1501c000
 84be0700 02201e00 f5da8a1f 09000700 0b440600 650fc000 968d0500 01200f00

 <32 bytes per line>

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        0x0041dd22
   ub4 bas_kcbh                             @8        0x1f8adac1
   ub2 wrp_kcbh                             @12       0x0000
   ub1 seq_kcbh                             @14       0x01
   ub1 flg_kcbh                             @15       0x04 (KCBHFCKV)
   ub2 chkval_kcbh                          @16       0x6cee
   ub2 spare3_kcbh                          @18       0x0000


BBED> sum apply
Check value for File 0, Block 122147:
current = 0x7364, required = 0x7364


BBED> verify
DBVERIFY - Verification starting
FILE = D:\BAIDUYUNDOWNLOAD\ORADATA\CHEASDB\SYSTEM01.DBF
BLOCK = 122146


DBVERIFY - Verification complete

Total Blocks Examined         : 1
Total Blocks Processed (Data) : 0
Total Blocks Failing   (Data) : 0
Total Blocks Processed (Index): 1
Total Blocks Failing   (Index): 0
Total Blocks Empty            : 0
Total Blocks Marked Corrupt   : 0
Total Blocks Influx           : 0

dbv再次验证,坏块完美修复

C:\Users\FAL>dbv file=D:\BAIDUYUNDOWNLOAD\ORADATA\CHEASDB\SYSTEM01.DBF

DBVERIFY: Release 11.2.0.1.0 - Production on 星期六 5月 14 22:00:06 2016

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.

DBVERIFY - 开始验证: FILE = D:\BAIDUYUNDOWNLOAD\ORADATA\CHEASDB\SYSTEM01.DBF


DBVERIFY - 验证完成

检查的页总数: 259840
处理的页总数 (数据): 181934
失败的页总数 (数据): 0
处理的页总数 (索引): 57381
失败的页总数 (索引): 0
处理的页总数 (其他): 3218
处理的总页数 (段)  : 1
失败的总页数 (段)  : 0
空的页总数: 17307
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            : 530218225 (0.530218225)

通过修复之后重新导出数据
exp-ok


参考相似篇章:file 1 block 128 corrupted/坏块恢复—system rollback坏块修复

发表在 非常规恢复 | 标签为 , , , , | 评论关闭

rman制造坏块,bbed修复坏块

在rman中有隐藏的命令clear,可以标记数据块为corrupt,从而实现数据库坏块试验,本篇blog通过dbv,bbed,table select来验证坏块的出现和修复
创建测试表

SQL>  create table t_xifenfei as  
  2   select object_id,object_name from dba_objects where rownum<10;

Table created.

SQL>  select rowid,
  2   dbms_rowid.rowid_relative_fno(rowid) rel_fno,
  3   dbms_rowid.rowid_block_number(rowid) block
  4   from chf.t_xifenfei;

ROWID                 REL_FNO      BLOCK
------------------ ---------- ----------
AAAStAAAEAAAACrAAA          4        171
AAAStAAAEAAAACrAAB          4        171
AAAStAAAEAAAACrAAC          4        171
AAAStAAAEAAAACrAAD          4        171
AAAStAAAEAAAACrAAE          4        171
AAAStAAAEAAAACrAAF          4        171
AAAStAAAEAAAACrAAG          4        171
AAAStAAAEAAAACrAAH          4        171
AAAStAAAEAAAACrAAI          4        171

9 rows selected.

SQL> alter system checkpoint;

System altered.

dbv验证坏块

[oracle@xifenfei ~]$ dbv file=/u01/oracle/oradata/ora11g/users01.dbf

DBVERIFY: Release 11.2.0.3.0 - Production on Sun Jan 20 09:12:16 2013

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

DBVERIFY - Verification starting : FILE = /u01/oracle/oradata/ora11g/users01.dbf


DBVERIFY - Verification complete

Total Pages Examined         : 7680
Total Pages Processed (Data) : 3776
Total Pages Failing   (Data) : 0
Total Pages Processed (Index): 167
Total Pages Failing   (Index): 0
Total Pages Processed (Other): 744
Total Pages Processed (Seg)  : 0
Total Pages Failing   (Seg)  : 0
Total Pages Empty            : 2993
Total Pages Marked Corrupt   : 0
Total Pages Influx           : 0
Total Pages Encrypted        : 0
Highest block SCN            : 1006717955 (2956.1006717955)

这里创建了t_xifenfei表,数据存储在file 4 block 171中,现在该block一切正常,本试验就是要通过rman来使得该block corrupt,然后通过bbed来修复

bbed查看kcbh

BBED> set block 171
        BLOCK#          171

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        0x010000ab
   ub4 bas_kcbh                             @8        0x3c014bfe
   ub2 wrp_kcbh                             @12       0x0b8c
   ub1 seq_kcbh                             @14       0x02
   ub1 flg_kcbh                             @15       0x04 (KCBHFCKV)
   ub2 chkval_kcbh                          @16       0x6e0c  <--重点关注
   ub2 spare3_kcbh                          @18       0x0000

rman标记坏块

RMAN> BLOCKRECOVER DATAFILE 4 block 171 clear;

Starting recover at 20-JAN-13
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=18 device type=DISK
Finished recover at 20-JAN-13

dbv再次检查坏块

[oracle@xifenfei ~]$ dbv file=/u01/oracle/oradata/ora11g/users01.dbf

DBVERIFY: Release 11.2.0.3.0 - Production on Sun Jan 20 09:53:16 2013

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

DBVERIFY - Verification starting : FILE = /u01/oracle/oradata/ora11g/users01.dbf
Page 171 is marked corrupt
Corrupt block relative dba: 0x010000ab (file 4, block 171)
Bad check value found during dbv: 
Data in bad block:
 type: 6 format: 2 rdba: 0x010000ab
 last change scn: 0x0b8c.3c014bfe seq: 0x2 flg: 0x04
 spare1: 0x0 spare2: 0x0 spare3: 0x0
 consistency value in tail: 0x4bfe0602
 check value in block header: 0x6e0c
 computed block checksum: 0xb5bc


DBVERIFY - Verification complete

Total Pages Examined         : 7680
Total Pages Processed (Data) : 3775
Total Pages Failing   (Data) : 0
Total Pages Processed (Index): 167
Total Pages Failing   (Index): 0
Total Pages Processed (Other): 744
Total Pages Processed (Seg)  : 0
Total Pages Failing   (Seg)  : 0
Total Pages Empty            : 2993
Total Pages Marked Corrupt   : 1
Total Pages Influx           : 1
Total Pages Encrypted        : 0
Highest block SCN            : 1006717955 (2956.1006717955)

尝试查询数据

SQL> select count(*) from t_xifenfei;
select count(*) from t_xifenfei
                     *
ERROR at line 1:
ORA-01578: ORACLE data block corrupted (file # 4, block # 171)
ORA-01110: data file 4: '/u01/oracle/oradata/ora11g/users01.dbf'

bbed验证坏块

BBED> set block 171
        BLOCK#          171

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        0x010000ab
   ub4 bas_kcbh                             @8        0x3c014bfe
   ub2 wrp_kcbh                             @12       0x0b8c
   ub1 seq_kcbh                             @14       0x02
   ub1 flg_kcbh                             @15       0x04 (KCBHFCKV)
   ub2 chkval_kcbh                          @16       0x6e0c  <--注意该值未变化
   ub2 spare3_kcbh                          @18       0x0000

BBED> verify
DBVERIFY - Verification starting
FILE = /u01/oracle/oradata/ora11g/users01.dbf
BLOCK = 171

Block 171 is corrupt
Corrupt block relative dba: 0x010000ab (file 0, block 171)
Bad check value found during verification
Data in bad block:
 type: 6 format: 2 rdba: 0x010000ab
 last change scn: 0x0b8c.3c014bfe seq: 0x2 flg: 0x04
 spare1: 0x0 spare2: 0x0 spare3: 0x0
 consistency value in tail: 0x4bfe0602
 check value in block header: 0x6e0c
 computed block checksum: 0xb5bc


DBVERIFY - Verification complete

Total Blocks Examined         : 1
Total Blocks Processed (Data) : 0
Total Blocks Failing   (Data) : 0
Total Blocks Processed (Index): 0
Total Blocks Failing   (Index): 0
Total Blocks Empty            : 0
Total Blocks Marked Corrupt   : 1
Total Blocks Influx           : 0
Message 531 not found;  product=RDBMS; facility=BBED

这里通过dbv,bbed,select table都证明rman能够标记block为Corrupt.
这里需要分析:block已经被标记,那证明该块肯定有修改,也就是说chkval_kcbh一定要变化,但是这里没有变化,证明该处异常

bbed修复rman生成坏块

BBED> sum apply
Warning: contents of previous BIFILE will be lost. Proceed? (Y/N) y
Check value for File 0, Block 171:
current = 0xdbb0, required = 0xdbb0

BBED> verify
DBVERIFY - Verification starting
FILE = /u01/oracle/oradata/ora11g/users01.dbf
BLOCK = 171


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
Message 531 not found;  product=RDBMS; facility=BBED

bbed测试坏块已经修复

dbv验证坏块

[oracle@xifenfei ~]$ dbv file=/u01/oracle/oradata/ora11g/users01.dbf

DBVERIFY: Release 11.2.0.3.0 - Production on Sun Jan 20 10:01:46 2013

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

DBVERIFY - Verification starting : FILE = /u01/oracle/oradata/ora11g/users01.dbf

DBVERIFY - Verification complete

Total Pages Examined         : 7680
Total Pages Processed (Data) : 3776
Total Pages Failing   (Data) : 0
Total Pages Processed (Index): 167
Total Pages Failing   (Index): 0
Total Pages Processed (Other): 744
Total Pages Processed (Seg)  : 0
Total Pages Failing   (Seg)  : 0
Total Pages Empty            : 2993
Total Pages Marked Corrupt   : 0
Total Pages Influx           : 0
Total Pages Encrypted        : 0
Highest block SCN            : 1006717955 (2956.1006717955)

dbv测试坏块也被修复

查询表验证

SQL> select count(*) from t_xifenfei;

  COUNT(*)
----------
         9

数据也可以正常查询,证明rman的坏块问题通过bbed解决

总结说明
1.我们可以通过rman的clear命令来标记坏块(BLOCKRECOVER DATAFILE file# BLOCK block1#, block2#, block3#… CLEAR ;)
2.我们可以通过bbed的sum apply命令来修复该类型坏块

发表在 Oracle备份恢复 | 标签为 , , | 4 条评论