有朋友找到我,他有客户库大量坏块,需要我们提供支持,因为这个库里面含有大量的存储过程,包等,要求数据要直接导出,不能使用工具挖.
dbv检查system大量坏块
DBVERIFY: Release 11.2.0.4.0 - Production on 星期二 11月 22 17:17:51 2016 Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved. DBVERIFY - 开始验证: FILE = h:\oracle\system01.dbf 页 4543 流入 - 很可能是介质损坏 Corrupt block relative dba: 0x004011bf (file 1, block 4543) Fractured block found during dbv: Data in bad block: type: 0 format: 2 rdba: 0x004011bf last change scn: 0x0000.00000000 seq: 0x1 flg: 0x05 spare1: 0x0 spare2: 0x0 spare3: 0x0 consistency value in tail: 0x7641344a check value in block header: 0xb6ff computed block checksum: 0x797 页 4544 标记为损坏 Corrupt block relative dba: 0x004011c0 (file 1, block 4544) Bad header found during dbv: Data in bad block: type: 71 format: 3 rdba: 0x754e362f last change scn: 0x7a37.6d424862 seq: 0x39 flg: 0x32 spare1: 0x35 spare2: 0x32 spare3: 0x3931 consistency value in tail: 0x7638356c check value in block header: 0x4856 block checksum disabled ………… 页 4613 标记为损坏 Corrupt block relative dba: 0x00401205 (file 1, block 4613) Bad header found during dbv: Data in bad block: type: 97 format: 7 rdba: 0x79634449 last change scn: 0x4364.77426a4c seq: 0x41 flg: 0x35 spare1: 0x34 spare2: 0x36 spare3: 0x7734 consistency value in tail: 0x505a4550 check value in block header: 0x434d computed block checksum: 0x6f3f 页 4614 标记为损坏 Corrupt block relative dba: 0x00401206 (file 1, block 4614) Completely zero block found during dbv: ………… 页 5125 标记为损坏 Corrupt block relative dba: 0x00401405 (file 1, block 5125) Completely zero block found during dbv: DBVERIFY - 验证完成 检查的页总数: 124160 处理的页总数 (数据): 90745 失败的页总数 (数据): 0 处理的页总数 (索引): 14417 失败的页总数 (索引): 0 处理的页总数 (其他): 3323 处理的总页数 (段) : 1 失败的总页数 (段) : 0 空的页总数: 15092 标记为损坏的总页数: 583 流入的页总数: 5 加密的总页数 : 0 最高块 SCN : 1417256245 (2.1417256245)
这里比较明显，一共583个坏块，而且是连续坏块(5125-4543+1)
尝试启动数据库
--直接尝试打开数据库
SQL> RECOVER DATABASE;
完成介质恢复。
SQL> alter database open;
alter database open
*
第 1 行出现错误:
ORA-01092: ORACLE instance terminated. Disconnection forced
ORA-00704: bootstrap process failure
ORA-00604: error occurred at recursive SQL level 2
ORA-01578: ORACLE data block corrupted (file # 1, block # 4575)
ORA-01110: data file 1: 'H:\ORACLE\SYSTEM01.DBF'
进程 ID: 2572
会话 ID: 85 序列号: 1
--跳过坏块event打开库
SQL> startup mount pfile='h:/oracle/pfile.txt'
ORACLE 例程已经启动。
Total System Global Area 2137886720 bytes
Fixed Size 2282944 bytes
Variable Size 520096320 bytes
Database Buffers 1610612736 bytes
Redo Buffers 4894720 bytes
数据库装载完毕。
SQL> show parameter event;
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
event string 43810 trace name context forev
er, level 10, 10231 trace name
context forever, level 10, 10
232 trace name context forever
, level 10, 10233 trace name c
ontext forever, level 10, 1004
1 trace name context forever,
level 10
xml_db_events string enable
SQL> alter database open;
alter database open
*
第 1 行出现错误:
ORA-01113: 文件 1 需要介质恢复
ORA-01110: 数据文件 1: 'H:\ORACLE\SYSTEM01.DBF'
SQL> recover database;
完成介质恢复。
SQL> alter database open;
alter database open
*
第 1 行出现错误:
ORA-01092: ORACLE instance terminated. Disconnection forced
ORA-00600: internal error code, arguments: [kokiasg1], [], [], [], [], [], [],
[], [], [], [], []
进程 ID: 9316
会话 ID: 4 序列号: 3
--upgrade方式打开数据库
SQL> startup mount pfile='h:/oracle/pfile.txt'
ORACLE 例程已经启动。
Total System Global Area 2137886720 bytes
Fixed Size 2282944 bytes
Variable Size 520096320 bytes
Database Buffers 1610612736 bytes
Redo Buffers 4894720 bytes
数据库装载完毕。
SQL> alter database open upgrade
2 ;
alter database open upgrade
*
第 1 行出现错误:
ORA-01092: ORACLE instance terminated. Disconnection forced
ORA-00600: internal error code, arguments: [kokiasg1], [], [], [], [], [], [],
[], [], [], [], []
进程 ID: 7976
会话 ID: 4 序列号: 3
至此数据库在这种坏块情况下，正常打开相当渺茫,因为报错的这些block 都是非常靠前的,也就是说这个里面很多块在数据库创建好的时候就已经在了(特别是通过模板创建的数据库,这些部分很可能都是固定的),考虑使用其他库的block来替代这些坏块,然后尝试打开库
修复坏块
[oracle@app101-20 ~]$ dd if=/Data/oracle/oradata/txlhdb/system01.dbf of=/tmp/1.dbf skip=4543 bs=8192 count=583 583+0 records in 583+0 records out 4775936 bytes (4.8 MB) copied, 0.0533578 s, 89.5 MB/s H:\oracle>dd if=d:/temp/1.dbf of=h:\oracle\system01.dbf seek=4543 bs=8192 count=583 conv=notrun rawwrite dd for windows version 0.6beta3. Written by John Newbigin <jn@it.swin.edu.au> This program is covered by terms of the GPL Version 2. notrun 583+0 records in 583+0 records out H:\oracle>dbv file=system01.dbf DBVERIFY: Release 11.2.0.4.0 - Production on 星期二 11月 22 20:17:51 2016 Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved. DBVERIFY - 开始验证: FILE = H:\ORACLE\SYSTEM01.DBF DBVERIFY - 验证完成 检查的页总数: 124160 处理的页总数 (数据): 90761 失败的页总数 (数据): 0 处理的页总数 (索引): 14479 失败的页总数 (索引): 0 处理的页总数 (其他): 3393 处理的总页数 (段) : 1 失败的总页数 (段) : 0 空的页总数: 15527 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 : 295310052 (11.295310052)
再次尝试打开数据库
C:\Users\XIFENFEI>sqlplus / as sysdba SQL*Plus: Release 11.2.0.4.0 Production on 星期二 11月 22 20:18:19 2016 Copyright (c) 1982, 2013, Oracle. All rights reserved. 已连接到空闲例程。 SQL> startup mount pfile='h:/oracle/pfile.txt'; ORACLE 例程已经启动。 Total System Global Area 2137886720 bytes Fixed Size 2282944 bytes Variable Size 520096320 bytes Database Buffers 1610612736 bytes Redo Buffers 4894720 bytes 数据库装载完毕。 SQL> recover database; 完成介质恢复。 SQL> alter database open; 数据库已更改。
后续错误ORA-04023处理
C:\Users\XIFENFEI>exp "'/ as sysdba'" owner=XIFENFEI file=d:/full_xff.dmp lo g=d:/full_xff.log FEEDBACK=10000 COMPRESS=NO BUFFER=102400000 STATISTICS=none Export: Release 11.2.0.4.0 - Production on 星期二 11月 22 20:20:27 2016 Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved. 连接到: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Produc tion With the Partitioning, OLAP, Data Mining and Real Application Testing options EXP-00056: 遇到 ORACLE 错误 4023 ORA-04023: 无法验证或授权对象 SELECT xdb_uid FROM SYS.EXU9XDBUID EXP-00000: 导出终止失败
数据库所有视图无法查询,通过直接对基表user$,obj$,view$等表查询出来视图信息,然后直接编译,然后数据可以完美导出,完成本次恢复
SQL> select 'alter view '||b.name||'.'||c.name||' compile;' 2 from view$ a,user$ b,obj$ c 3 where a.obj#=c.obj# 4 and c.owner#=b.user#;
