在丟失歸檔情況下,恢復時常會遇到ora-01113錯誤,以下實驗模擬表空間offline,然後在丟失歸檔文件的情況下使用BBED修改文件頭信息,最後恢復數據文件；
數據庫版本:
SQL> select * from v$version; BANNER -------------------------------------------------------------------------------- Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production PL/SQL Release 11.2.0.1.0 - Production CORE 11.2.0.1.0 Production TNS for Linux: Version 11.2.0.1.0 - Production NLSRTL Version 11.2.0.1.0 - Production
數據文件信息:
SQL> select file#,name, CHECKPOINT_CHANGE#,to_char(CHECKPOINT_TIME,'yyyy-mm-dd hh24:mi:ss')checkpoint_time,status,BLOCK_SIZE from v$datafile;
FILE# NAME CHECKPOINT_CHANGE# CHECKPOINT_TIME STATUS BLOCK_SIZE
---------- ----------------------------------- ------------------ ------------------- ------- ----------
1 /u01/app/oradata/sydb/system01.dbf 3161898 2015-04-13 20:46:37 SYSTEM 8192
2 /u01/app/oradata/sydb/sysaux01.dbf 3161898 2015-04-13 20:46:37 ONLINE 8192
3 /u01/app/oradata/sydb/undotbs01.dbf 3161898 2015-04-13 20:46:37 ONLINE 8192
4 /u01/app/oradata/sydb/users01.dbf 3161898 2015-04-13 20:46:37 ONLINE 8192
5 /disk2/oradata/sydb/tbs01.dbf 3161898 2015-04-13 20:46:37 ONLINE 8192
6 /disk2/oradata/sydb/tbs02.dbf 3161898 2015-04-13 20:46:37 ONLINE 8192
7 /disk2/oradata/sydb/tbs03.dbf 3161898 2015-04-13 20:46:37 ONLINE 8192
8 /tmp/tbs_tmp.dbf 3161898 2015-04-13 20:46:37 ONLINE 8192
offline數據文件7並刪除歸檔模擬ora-01113:
SQL> alter database datafile 7 offline;
Database altered.
SQL> alter system switch logfile;
System altered.
SQL> alter system switch logfile;
System altered.
SQL> alter database datafile 7 online;
alter database datafile 7 online
*
ERROR at line 1:
ORA-01113: file 7 needs media recovery
ORA-01110: data file 7: '/disk2/oradata/sydb/tbs03.dbf'
SQL> select file#,change#,time from v$recover_file;
FILE# CHANGE# TIME
---------- ---------- ---------
7 3161898 13-APR-15
使用BBED需要修改的內容有:
ub4
kscnbas @484 #最後檢查的SCN
ub4
kcvcptim @492 #檢查時間
ub4
kcvfhcpc @140 #檢查點發生次數
ub4
kcvfhccc @148 #未知,但值一直小於kcvfhcpc
1
BBED> info
File# Name Size(blks)
----- ---- ----------
1 /u01/app/oradata/sydb/system01.dbf 92160
2 /u01/app/oradata/sydb/sysaux01.dbf 71680
3 /u01/app/oradata/sydb/undotbs01.dbf 52480
4 /u01/app/oradata/sydb/users01.dbf 1600
5 /disk2/oradata/sydb/tbs01.dbf 221696
6 /disk2/oradata/sydb/tbs02.dbf 14592
7 /disk2/oradata/sydb/tbs03.dbf 2560
8 /tmp/tbs_tmp.dbf 1280
先確認好system表空間文件信息:
BBED> set dba 1,1 block 1
DBA 0x00400001 (4194305 1,1)
BLOCK# 1
BBED> print kcvfhckp
struct kcvfhckp, 36 bytes @484
struct kcvcpscn, 8 bytes @484
ub4 kscnbas @484 0x003043a9
ub2 kscnwrp @488 0x0000
ub4 kcvcptim @492 0x34453174
BBED> dump/v dba 1,1 offset 484 count 30
File: /u01/app/oradata/sydb/system01.dbf (1)
Block: 1 Offsets: 484 to 513 Dba:0x00400001
-------------------------------------------------------
a9433000 00000000 74314534 01000000 l ....t1E4....
ab000000 2e080000 1000866b 0200 l .......k..
BBED> dump/v dba 1,1 offset 492 count 30
File: /u01/app/oradata/sydb/system01.dbf (1)
Block: 1 Offsets: 492 to 521 Dba:0x00400001
-------------------------------------------------------
74314534 01000000 ab000000 2e080000 l t1E4........
1000866b 02000000 00000000 0000 l ...k.......…
BBED> print kcvfhcpc
ub4 kcvfhcpc @140 0x00000237
BBED> dump/v dba 1,1 offset 140 count 30
File: /u01/app/oradata/sydb/system01.dbf (1)
Block: 1 Offsets: 140 to 169 Dba:0x00400001
-------------------------------------------------------
37020000 fe522034 36020000 00000000 l 7...6.......
00000000 00000000 00000000 0000 l ...........…
BBED> print kcvfhccc
ub4 kcvfhccc @148 0x00000236
BBED> dump/v dba 1,1 offset 148 count 30
File: /u01/app/oradata/sydb/system01.dbf (1)
Block: 1 Offsets: 148 to 177 Dba:0x00400001
-------------------------------------------------------
36020000 00000000 00000000 00000000 l 6...............
00000000 00000000 00000000 0000 l ..............
再確認數據文件7信息:
BBED> print kcvfhckp
struct kcvfhckp, 36 bytes @484
struct kcvcpscn, 8 bytes @484
ub4 kscnbas @484 0x00303f2a
ub2 kscnwrp @488 0x0000
ub4 kcvcptim @492 0x34452bad
ub2 kcvcpthr @496 0x0001
BBED> dump/v dba 7,1 offset 484 count 30
File: /disk2/oradata/sydb/tbs03.dbf (7)
Block: 1 Offsets: 484 to 513 Dba:0x01c00001
-------------------------------------------------------
2a3f3000 00000000 ad2b4534 01000000 l *?0.........
a8000000 65000000 10000000 0200 l e.........
<16 bytes per line>
BBED> dump/v dba 7,1 offset 492 count 30
File: /disk2/oradata/sydb/tbs03.dbf (7)
Block: 1 Offsets: 492 to 521 Dba:0x01c00001
-------------------------------------------------------
ad2b4534 01000000 a8000000 65000000 l ....e...
10000000 02000000 00000000 0000 l ...........…
BBED> print kcvfhcpc
ub4 kcvfhcpc @140 0x00000164
BBED> dump/v dba 7,1 offset 140
File: /disk2/oradata/sydb/tbs03.dbf (7)
Block: 1 Offsets: 140 to 169 Dba:0x01c00001
-------------------------------------------------------
64010000 fe522034 63010000 00000000 l d...c.......
00000000 00000000 00000000 0000 l ...........…
BBED> print kcvfhccc
ub4 kcvfhccc @148 0x00000163
BBED> dump/v dba 7,1 offset 148
File: /disk2/oradata/sydb/tbs03.dbf (7)
Block: 1 Offsets: 148 to 177 Dba:0x01c00001
-------------------------------------------------------
63010000 00000000 00000000 00000000 l c...............
00000000 00000000 00000000 0000 l ..............
00303f2a 剛好是v$recover_file 中查詢到的CHANGE#值
SQL> select to_number('00303f2a','xxxxxxxxx') from dual;
TO_NUMBER('00303F2A','XXXXXXXXX')
---------------------------------
3161898
修改值:
BBED> modify /x a943 dba 7,1 offset 484
BBED> set offset +2
OFFSET 486
BBED> modify /x 3000
BBED> dump /v dba 7,1 offset 484
File: /disk2/oradata/sydb/tbs03.dbf (7)
Block: 1 Offsets: 484 to 513 Dba:0x01c00001
-------------------------------------------------------
a9433000 00000000 ad2b4534 01000000 l ........
a8000000 65000000 10000000 0200 l e......…
BBED> modify /x 74314534 dba 7,1 offset 492
File: /disk2/oradata/sydb/tbs03.dbf (7)
Block: 1 Offsets: 492 to 521 Dba:0x01c00001
------------------------------------------------------------------------
74314534 01000000 a8000000 65000000 10000000 02000000 00000000 0000
BBED> modify /x 37020000 dba 7,1 offset 140
File: /disk2/oradata/sydb/tbs03.dbf (7)
Block: 1 Offsets: 140 to 169 Dba:0x01c00001
------------------------------------------------------------------------
37020000 fe522034 63010000 00000000 00000000 00000000 00000000 0000
BBED> modify /x 36020000 dba 7,1 offset 148
File: /disk2/oradata/sydb/tbs03.dbf (7)
Block: 1 Offsets: 148 to 177 Dba:0x01c00001
------------------------------------------------------------------------
36020000 00000000 00000000 00000000 00000000 00000000 00000000 0000
BBED> sum apply
Check value for File 7, Block 1:
current = 0x7b4d, required = 0x7b4d
確認修改:
SQL> select * from v$recover_file;
FILE# ONLINE ONLINE_ ERROR CHANGE# TIME
---------- ------- ------- ----------------------------------------------------------------- ---------- ---------
7 OFFLINE OFFLINE UNKNOWN ERROR 3163049 13-APR-15
SQL> column name format a35
SQL> select file#,name, CHECKPOINT_CHANGE#,to_char(CHECKPOINT_TIME,'yyyy-mm-dd hh24:mi:ss')checkpoint_time,status,BLOCK_SIZE from v$datafile;
FILE# NAME CHECKPOINT_CHANGE# CHECKPOINT_TIME STATUS BLOCK_SIZE
---------- ----------------------------------- ------------------ ------------------- ------- ----------
1 /u01/app/oradata/sydb/system01.dbf 3163049 2015-04-13 21:11:16 SYSTEM 8192
2 /u01/app/oradata/sydb/sysaux01.dbf 3163049 2015-04-13 21:11:16 ONLINE 8192
3 /u01/app/oradata/sydb/undotbs01.dbf 3163049 2015-04-13 21:11:16 ONLINE 8192
4 /u01/app/oradata/sydb/users01.dbf 3163049 2015-04-13 21:11:16 ONLINE 8192
5 /disk2/oradata/sydb/tbs01.dbf 3163049 2015-04-13 21:11:16 ONLINE 8192
6 /disk2/oradata/sydb/tbs02.dbf 3163049 2015-04-13 21:11:16 ONLINE 8192
7 /disk2/oradata/sydb/tbs03.dbf 3161898 2015-04-13 20:46:37 RECOVER 8192
8 /tmp/tbs_tmp.dbf 3163049 2015-04-13 21:11:16 ONLINE 8192
控制文件的信息沒有被修改也無法通過BBED修改,所以此時無法恢復data file 7;
SQL> alter database datafile 7 online; alter database datafile 7 online * ERROR at line 1: ORA-01113: file 7 needs media recovery ORA-01110: data file 7: '/disk2/oradata/sydb/tbs03.dbf' SQL> recover datafile 7; ORA-00283: recovery session canceled due to errors ORA-01122: database file 7 failed verification check ORA-01110: data file 7: '/disk2/oradata/sydb/tbs03.dbf' ORA-01207: file is more recent than control file - old control file
通過重建控制文件恢復數據文件7:
SQL> alter database backup controlfile to trace;
SQL> shutdown immediate
SQL>STARTUP NOMOUNT
CREATE CONTROLFILE REUSE DATABASE "SYDB" NORESETLOGS ARCHIVELOG
MAXLOGFILES 16
MAXLOGMEMBERS 3
MAXDATAFILES 100
MAXINSTANCES 8
MAXLOGHISTORY 292
LOGFILE
GROUP 1 '/u01/app/oradata/sydb/redo01.log' SIZE 50M BLOCKSIZE 512,
GROUP 2 '/u01/app/oradata/sydb/redo02.log' SIZE 50M BLOCKSIZE 512,
GROUP 3 '/u01/app/oradata/sydb/redo03.log' SIZE 50M BLOCKSIZE 512
-- STANDBY LOGFILE
DATAFILE
'/u01/app/oradata/sydb/system01.dbf',
'/u01/app/oradata/sydb/sysaux01.dbf',
'/u01/app/oradata/sydb/undotbs01.dbf',
'/u01/app/oradata/sydb/users01.dbf',
'/disk2/oradata/sydb/tbs01.dbf',
'/disk2/oradata/sydb/tbs02.dbf',
'/disk2/oradata/sydb/tbs03.dbf',
'/tmp/tbs_tmp.dbf'
CHARACTER SET UTF8
;
Control file created.
SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-01113: file 7 needs media recovery
ORA-01110: data file 7: '/disk2/oradata/sydb/tbs03.dbf''
SQL> recover database;
Media recovery complete.
SQL> alter database open;
Database altered.
SQL> column name format a35
SQL> select file#,name, CHECKPOINT_CHANGE#,to_char(CHECKPOINT_TIME,'yyyy-mm-dd hh24:mi:ss')checkpoint_time,status,BLOCK_SIZE from v$datafile;
FILE# NAME CHECKPOINT_CHANGE# CHECKPOINT_TIME STATUS BLOCK_SIZE
---------- ----------------------------------- ------------------ ------------------- ------- ----------
1 /u01/app/oradata/sydb/system01.dbf 3183058 2015-04-13 22:11:12 SYSTEM 8192
2 /u01/app/oradata/sydb/sysaux01.dbf 3183058 2015-04-13 22:11:12 ONLINE 8192
3 /u01/app/oradata/sydb/undotbs01.dbf 3183058 2015-04-13 22:11:12 ONLINE 8192
4 /u01/app/oradata/sydb/users01.dbf 3183058 2015-04-13 22:11:12 ONLINE 8192
5 /disk2/oradata/sydb/tbs01.dbf 3183058 2015-04-13 22:11:12 ONLINE 8192
6 /disk2/oradata/sydb/tbs02.dbf 3183058 2015-04-13 22:11:12 ONLINE 8192
7 /disk2/oradata/sydb/tbs03.dbf 3183058 2015-04-13 22:11:12 ONLINE 8192
8 /tmp/tbs_tmp.dbf 3183058 2015-04-13 22:11:12 ONLINE 8192
注:不同情況，有可能還是無法打開數據庫，比如報(ORA-01113: file 1 needs media recovery),嘗試使用NORESETLOGS方式重建控制文件,然後在執行Media Recovery 。
--Then end (2015-04-13)
