Oracle 12c redo 丢失恢复

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标题：Oracle 12c redo 丢失恢复

作者：惜分飞©版权所有[未经本人同意,不得以任何形式转载,否则有进一步追究法律责任的权利.]

模拟redo丢失
对数据库的一个pdb模拟事务操作，然后abort库，并且删除所有redo，模拟生产环境redo丢失的case

[oracle@ora1221 oradata]$ ss
SQL*Plus: Release 12.2.0.0.3 Production on Wed Jun 15 10:13:20 2016
Copyright (c) 1982, 2016, Oracle.  All rights reserved.
Connected to an idle instance.
SQL> startup
ORACLE instance started.
Total System Global Area 2516582400 bytes
Fixed Size                  8260048 bytes
Variable Size             671090224 bytes
Database Buffers         1828716544 bytes
Redo Buffers                8515584 bytes
Database mounted.
Database opened.
SQL>
SQL>
SQL> set pages 100
SQL> show pdbs;
    CON_ID CON_NAME                       OPEN MODE  RESTRICTED
---------- ------------------------------ ---------- ----------
         2 PDB$SEED                       READ ONLY  NO
         3 PDB1                           MOUNTED
         4 PDB2                           MOUNTED
SQL> select con_id,file#,checkpoint_change# from v$datafile_header order by 1;
    CON_ID      FILE# CHECKPOINT_CHANGE#
---------- ---------- ------------------
         1          1            1500157
         1          3            1500157
         1          4            1500157
         1          7            1500157
         2          5            1371280
         2          6            1371280
         2          8            1371280
         3          9            1499902
         3         12            1499902
         3         11            1499902
         3         10            1499902
         4         15            1499903
         4         14            1499903
         4         13            1499903
         4         16            1499903
15 rows selected.
SQL> alter PLUGGABLE database pdb1 open;
Pluggable database altered.
SQL> show pdbs;
    CON_ID CON_NAME                       OPEN MODE  RESTRICTED
---------- ------------------------------ ---------- ----------
         2 PDB$SEED                       READ ONLY  NO
         3 PDB1                           READ WRITE NO
         4 PDB2                           MOUNTED
SQL> alter session set container=pdb1;
Session altered.
SQL> create user chf identified by oracle;
User created.
SQL> grant dba to chf;
Grant succeeded.
SQL> create table chf.t_pdb1_xifenfei as select * from dba_objects;
Table created.
SQL> delete from chf.t_pdb1_xifenfei;
72426 rows deleted.
--另外一个节点
[oracle@ora1221 ~]$ ss
SQL*Plus: Release 12.2.0.0.3 Production on Wed Jun 15 10:19:21 2016
Copyright (c) 1982, 2016, Oracle.  All rights reserved.
Connected to:
Oracle Database 12c Enterprise Edition Release 12.2.0.0.3 - 64bit Production
SQL> shutdown abort
ORACLE instance shut down.
[oracle@ora1221 orcl12c2]$ ls redo*
redo01.log  redo02.log  redo03.log
[oracle@ora1221 orcl12c2]$ rm redo0*
[oracle@ora1221 orcl12c2]$ ls -l redo*
ls: cannot access redo*: No such file or directory

尝试启动数据库

[oracle@ora1221 orcl12c2]$ ss
SQL*Plus: Release 12.2.0.0.3 Production on Wed Jun 15 10:26:20 2016
Copyright (c) 1982, 2016, Oracle.  All rights reserved.
Connected to an idle instance.
SQL> startup mount;
ORACLE instance started.
Total System Global Area 2516582400 bytes
Fixed Size                  8260048 bytes
Variable Size             671090224 bytes
Database Buffers         1828716544 bytes
Redo Buffers                8515584 bytes
Database mounted.
SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-00313: open failed for members of log group 1 of thread 1
ORA-00312: online log 1 thread 1: '/u01/app/oracle/oradata/orcl12c2/redo01.log'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 7

使用隐含参数启动

----pfile里面增加
_allow_error_simulation=TRUE
_allow_resetlogs_corruption=true
~
SQL> shutdown immediate;
ORA-01109: database not open
Database dismounted.
ORACLE instance shut down
SQL> startup pfile='/tmp/pfile' mount
ORACLE instance started.
Total System Global Area 2516582400 bytes
Fixed Size                  8260048 bytes
Variable Size             671090224 bytes
Database Buffers         1828716544 bytes
Redo Buffers                8515584 bytes
Database mounted.
SQL> alter database open resetlogs;
alter database open resetlogs
*
ERROR at line 1:
ORA-00603: ORACLE server session terminated by fatal error
ORA-01092: ORACLE instance terminated. Disconnection forced
ORA-00600: internal error code, arguments: [kcbzib_kcrsds_1], [], [], [], [],
[], [], [], [], [], [], []
Process ID: 36797
Session ID: 16 Serial number: 24277

继续重启库
ORA-600 kcbzib_kcrsds_1错误尝试重启数据库,如果不行,考虑使用bbed修改文件头信息

SQL> startup mount pfile='/tmp/pfile'
ORACLE instance started.
Total System Global Area 2516582400 bytes
Fixed Size                  8260048 bytes
Variable Size             671090224 bytes
Database Buffers         1828716544 bytes
Redo Buffers                8515584 bytes
Database mounted.
SQL> recover database until cancel;
ORA-00283: recovery session canceled due to errors
ORA-16433: The database or pluggable database must be opened in read/write
mode.
SQL> alter database backup controlfile to trace as '/tmp/ctl';
alter database backup controlfile to trace as '/tmp/ctl'
*
ERROR at line 1:
ORA-16433: The database or pluggable database must be opened in read/write
mode.

重建控制文件

SQL> startup nomount pfile='/tmp/pfile'
ORACLE instance started.
Total System Global Area 2516582400 bytes
Fixed Size                  8260048 bytes
Variable Size             671090224 bytes
Database Buffers         1828716544 bytes
Redo Buffers                8515584 bytes
SQL> CREATE CONTROLFILE REUSE DATABASE "orcl12c2" RESETLOGS  NOARCHIVELOG
  2      MAXLOGFILES 50
  3      MAXLOGMEMBERS 5
  4      MAXDATAFILES 100
  5      MAXINSTANCES 1
  6      MAXLOGHISTORY 226
  7  LOGFILE
  8    GROUP 1 '/u01/app/oracle/oradata/orcl12c2/redo01.log'  SIZE 200M,
  9    GROUP 2 '/u01/app/oracle/oradata/orcl12c2/redo02.log'  SIZE 200M,
 10    GROUP 3 '/u01/app/oracle/oradata/orcl12c2/redo03.log'  SIZE 200M
 11  DATAFILE
 12  '/u01/app/oracle/oradata/orcl12c2/system01.dbf',
 13  '/u01/app/oracle/oradata/orcl12c2/sysaux01.dbf',
 14  '/u01/app/oracle/oradata/orcl12c2/undotbs01.dbf',
 15  '/u01/app/oracle/oradata/orcl12c2/pdbseed/system01.dbf',
 16  '/u01/app/oracle/oradata/orcl12c2/pdbseed/sysaux01.dbf',
 17  '/u01/app/oracle/oradata/orcl12c2/users01.dbf',
 18  '/u01/app/oracle/oradata/orcl12c2/pdbseed/undotbs01.dbf',
 19  '/u01/app/oracle/oradata/orcl12c2/pdb1/system01.dbf',
 20  '/u01/app/oracle/oradata/orcl12c2/pdb1/sysaux01.dbf',
 21  '/u01/app/oracle/oradata/orcl12c2/pdb1/undotbs01.dbf',
 22  '/u01/app/oracle/oradata/orcl12c2/pdb1/users01.dbf',
 23  '/u01/app/oracle/oradata/orcl12c2/pdb2/system01.dbf',
 24  '/u01/app/oracle/oradata/orcl12c2/pdb2/sysaux01.dbf',
 25  '/u01/app/oracle/oradata/orcl12c2/pdb2/undotbs01.dbf',
 26  '/u01/app/oracle/oradata/orcl12c2/pdb2/users01.dbf'
 27  CHARACTER SET AL32UTF8
 28  ;
Control file created.
SQL> recover database until cancel;
ORA-00283: recovery session canceled due to errors
ORA-01610: recovery using the BACKUP CONTROLFILE option must be done
SQL> recover database until cancel using backup controlfile;
ORA-00279: change 1500161 generated at 06/15/2016 10:40:42 needed for thread 1
ORA-00289: suggestion :
/u01/app/oracle/product/12.2.0/db_2/dbs/arch1_1_914582438.dbf
ORA-00280: change 1500161 for thread 1 is in sequence #1
Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
/u01/app/oracle/oradata/orcl12c2/redo01.log
Log applied.
Media recovery complete.
SQL> alter database open resetlogs;
Database altered.

<strong>open过程alert日志</strong>

<strong>open pdb1</strong>

SQL> alter PLUGGABLE database pdb1  open;
Pluggable database altered.

pdb1 open alert日志

2016-06-15T11:13:39.423057+08:00
alter PLUGGABLE database pdb1  open
PDB1(3):Autotune of undo retention is turned on.
2016-06-15T11:13:39.495559+08:00
PDB1(3):Endian type of dictionary set to little
PDB1(3):[40547] Successfully onlined Undo Tablespace 2.
PDB1(3):Undo initialization finished serial:0 start:371149831 end:371149872 diff:41 ms (0.0 seconds)
PDB1(3):Database Characterset for PDB1 is AL32UTF8
PDB1(3):*********************************************************************
PDB1(3):WARNING: The following temporary tablespaces in container(PDB1)
PDB1(3):         contain no files.
PDB1(3):         This condition can occur when a backup controlfile has
PDB1(3):         been restored.  It may be necessary to add files to these
PDB1(3):         tablespaces.  That can be done using the SQL statement:
PDB1(3):
PDB1(3):         ALTER TABLESPACE <tablespace_name> ADD TEMPFILE
PDB1(3):
PDB1(3):         Alternatively, if these temporary tablespaces are no longer
PDB1(3):         needed, then they can be dropped.
PDB1(3):           Empty temporary tablespace: TEMP
PDB1(3):*********************************************************************
PDB1(3):Opatch validation is skipped for PDB PDB1 (con_id=0)
PDB1(3):Opening pdb with no Resource Manager plan active
Pluggable database PDB1 opened read write
Completed: alter PLUGGABLE database pdb1  open

open pdb2

SQL> alter PLUGGABLE database pdb2 open;
alter PLUGGABLE database pdb2 open
*
ERROR at line 1:
ORA-00600: internal error code, arguments: [17090], [], [], [], [], [], [], [],
[], [], [], []

分析alert日志和trace文件

--alert日志部分
PDB1(3):alter PLUGGABLE database pdb2 open
PDB1(3):ORA-65118 signalled during: alter PLUGGABLE database pdb2 open...
2016-06-15T11:28:57.439963+08:00
PDB1(3):Unified Audit: Audit record write to table failed due to ORA-25153.
Writing the audit record to OS spillover file. Please grep in the trace files for ORA-25153 for more diagnostic information.
Errors in file /u01/app/oracle/diag/rdbms/orcl12c2/orcl12c2/trace/orcl12c2_ora_40547.trc  (incident=29073) (PDBNAME=PDB1):
ORA-00600: internal error code, arguments: [17090], [], [], [], [], [], [], [], [], [], [], []
PDB1(3):Incident details in: /u01/app/oracle/diag/rdbms/orcl12c2/orcl12c2/incident/incdir_29073/orcl12c2_ora_40547_i29073.trc
PDB1(3):*****************************************************************
PDB1(3):An internal routine has requested a dump of selected redo.
PDB1(3):This usually happens following a specific internal error, when
PDB1(3):analysis of the redo logs will help Oracle Support with the
PDB1(3):diagnosis.
PDB1(3):It is recommended that you retain all the redo logs generated (by
PDB1(3):all the instances) during the past 12 hours, in case additional
PDB1(3):redo dumps are required to help with the diagnosis.
PDB1(3):*****************************************************************
2016-06-15T11:28:59.123041+08:00
PDB1(3):Use ADRCI or Support Workbench to package the incident.
See Note 411.1 at My Oracle Support for error and packaging details.
2016-06-15T11:28:59.945667+08:00
Dumping diagnostic data in directory=[cdmp_20160615112859], requested by (instance=1, osid=40547), summary=[incident=29073].
2016-06-15T11:35:59.987419+08:00
PDB1(3): alter PLUGGABLE database pdb2 open
PDB1(3):ORA-65118 signalled during:  alter PLUGGABLE database pdb2 open...
--trace部分
PARSING IN CURSOR #0x7f051a3d7650 len=118 dep=1 uid=0 oct=3 lid=0 tim=372490287736 hv=1128335472 ad='0x6ca82f00' sqlid='gu930gd1n223h'
select tablespace_name, tablespace_size, allocated_space, free_space, con_id  from cdb_temp_free_space order by con_id
END OF STMT
EXEC #0x7f051a3d7650:c=0,e=144,p=0,cr=0,cu=0,mis=0,r=0,dep=1,og=4,plh=2538033465,tim=372490287732
FETCH #0x7f051a3d7650:c=0,e=290,p=0,cr=14,cu=0,mis=0,r=0,dep=1,og=4,plh=2538033465,tim=372490288109
WAIT #0x7f051bd5f870: nam='Disk file operations I/O' ela= 52 FileOperation=2 fileno=0 filetype=36 obj#=402 tim=372490288373
WAIT #0x7f051bd5f870: nam='Disk file operations I/O' ela= 17 FileOperation=8 fileno=1 filetype=36 obj#=402 tim=372490288577
WAIT #0x7f051bd5f870: nam='Disk file operations I/O' ela= 3 FileOperation=8 fileno=1 filetype=36 obj#=402 tim=372490288655
WAIT #0x7f051bd5f870: nam='Disk file operations I/O' ela= 690 FileOperation=8 fileno=1 filetype=36 obj#=402 tim=372490289365
WAIT #0x7f051bd5f870: nam='Disk file operations I/O' ela= 6 FileOperation=8 fileno=1 filetype=36 obj#=402 tim=372490289470
WAIT #0x7f051bd5f870: nam='Disk file operations I/O' ela= 445 FileOperation=8 fileno=1 filetype=36 obj#=402 tim=372490289934
WAIT #0x7f051bd5f870: nam='Disk file operations I/O' ela= 3 FileOperation=8 fileno=1 filetype=36 obj#=402 tim=372490289983
WAIT #0x7f051bd5f870: nam='Disk file operations I/O' ela= 375 FileOperation=8 fileno=1 filetype=36 obj#=402 tim=372490290374
WAIT #0x7f051bd5f870: nam='Disk file operations I/O' ela= 6 FileOperation=8 fileno=1 filetype=36 obj#=402 tim=372490290453
WAIT #0x7f051bd5f870: nam='Disk file operations I/O' ela= 367 FileOperation=8 fileno=1 filetype=36 obj#=402 tim=372490290839
WAIT #0x7f051bd5f870: nam='Disk file operations I/O' ela= 3 FileOperation=8 fileno=1 filetype=36 obj#=402 tim=372490290882
WAIT #0x7f051bd5f870: nam='Disk file operations I/O' ela= 355 FileOperation=8 fileno=1 filetype=36 obj#=402 tim=372490291252
WAIT #0x7f051bd5f870: nam='Disk file operations I/O' ela= 4 FileOperation=8 fileno=1 filetype=36 obj#=402 tim=372490291298
WAIT #0x7f051bd5f870: nam='Disk file operations I/O' ela= 276 FileOperation=8 fileno=1 filetype=36 obj#=402 tim=372490291590
WAIT #0x7f051bd5f870: nam='Disk file operations I/O' ela= 1 FileOperation=8 fileno=1 filetype=36 obj#=402 tim=372490291614
WAIT #0x7f051bd5f870: nam='Disk file operations I/O' ela= 256 FileOperation=8 fileno=1 filetype=36 obj#=402 tim=372490291879
WAIT #0x7f051bd5f870: nam='Disk file operations I/O' ela= 2 FileOperation=8 fileno=1 filetype=36 obj#=402 tim=372490291903
WAIT #0x7f051bd5f870: nam='Disk file operations I/O' ela= 261 FileOperation=8 fileno=1 filetype=36 obj#=402 tim=372490292172
WAIT #0x7f051bd5f870: nam='Disk file operations I/O' ela= 30 FileOperation=3 fileno=0 filetype=36 obj#=402 tim=372490292225
WAIT #0x7f051bd5f870: nam='Disk file operations I/O' ela= 934 FileOperation=8 fileno=1 filetype=36 obj#=402 tim=372490293171
WAIT #0x7f051bd5f870: nam='Disk file operations I/O' ela= 3 FileOperation=8 fileno=1 filetype=36 obj#=402 tim=372490293208
WAIT #0x7f051bd5f870: nam='Disk file operations I/O' ela= 245 FileOperation=8 fileno=1 filetype=36 obj#=402 tim=372490293465
WAIT #0x7f051bd5f870: nam='Disk file operations I/O' ela= 262 FileOperation=8 fileno=1 filetype=36 obj#=402 tim=372490293755
WAIT #0x7f051bd5f870: nam='Disk file operations I/O' ela= 1 FileOperation=8 fileno=1 filetype=36 obj#=402 tim=372490293780
WAIT #0x7f051bd5f870: nam='Disk file operations I/O' ela= 250 FileOperation=8 fileno=1 filetype=36 obj#=402 tim=372490294039
WAIT #0x7f051bd5f870: nam='Disk file operations I/O' ela= 256 FileOperation=8 fileno=1 filetype=36 obj#=402 tim=372490294323
WAIT #0x7f051bd5f870: nam='Disk file operations I/O' ela= 8 FileOperation=5 fileno=0 filetype=36 obj#=402 tim=372490294359
2016-06-15T11:36:00.055196+08:00
Incident 29074 created, dump file: /u01/app/oracle/diag/rdbms/orcl12c2/orcl12c2/incident/incdir_29074/orcl12c2_ora_40547_i29074.trc
ORA-00600: internal error code, arguments: [17090], [], [], [], [], [], [], [], [], [], [], []

从中可以判断出来是由于CDB$ROOT的未增加tempfile导致

SQL> alter tablespace temp add tempfile '/u01/app/oracle/oradata/orcl12c2/temp01.dbf' reuse;
Tablespace altered.
SQL>  alter PLUGGABLE database pdb2 open;
Pluggable database altered.

查看数据库恢复情况

SQL> show pdbs;
    CON_ID CON_NAME                       OPEN MODE  RESTRICTED
---------- ------------------------------ ---------- ----------
         2 PDB$SEED                       READ ONLY  NO
         3 PDB1                           READ WRITE NO
         4 PDB2                           READ WRITE NO
SQL> select con_id,file#,checkpoint_change#,resetlogs_change# from v$datafile_header;
    CON_ID      FILE# CHECKPOINT_CHANGE# RESETLOGS_CHANGE#
---------- ---------- ------------------ -----------------
         1          1            2500167           1500164
         1          3            2500167           1500164
         1          4            2500167           1500164
         2          5            1371280           1341067
         2          6            1371280           1341067
         1          7            2500167           1500164
         2          8            1371280           1341067
         3          9            2501017           1500164
         3         10            2501017           1500164
         3         11            2501017           1500164
         3         12            2501017           1500164
         4         13            2502748           1500164
         4         14            2502748           1500164
         4         15            2502748           1500164
         4         16            2502748           1500164
15 rows selected.

至此基本上测试完成在在cdb环境中丢失redo的恢复。在生产中，需要把temp加全，并且建议重建数据库

深入分析一次ORA-00314错误

联系：手机/微信(+86 17813235971) QQ(107644445)

标题：深入分析一次ORA-00314错误

作者：惜分飞©版权所有[未经本人同意,不得以任何形式转载,否则有进一步追究法律责任的权利.]

运行在win平台上的oracle 10G数据库,因为主机蓝屏,使用pe拷贝出来相关数据库文件,redo文件,控制文件,在恢复数据库过中遇到ORA-00314错误,而无法继续下去

恢复报错

SQL> recover database
ORA-00283: 恢复会话因错误而取消
ORA-00314: 日志 3 (用于线程 1) 要求的序号 1366 与 1363 不匹配
ORA-00312: 联机日志 3 线程 1:
'DC:\ORADATA\INTERLIB\REDO03.LOG'
00314, 00000, "log %s of thread %s, expected sequence# %s doesn't match %s"
// *Cause:  The online log is corrupted or is an old version.
// *Action: Find and install correct version of log or reset logs.

这里提示可以大概看出来,数据库进行恢复的时候,需要sequence 为1366的日志,但是与现在的1363不匹配。通过上面的解释我们很可能知道是redo文件异常或者弄错了redo文件

分析Oracle Database Recovery Check结果
控制文件scn相关信息,从这里可以看到数据库的控制文件scn为47714860,checkpoint scn为47711411
r1
控制文件中关于数据库文件是scn为47711411,而且stop_scn为null
r2
数据文件头scn是47711411,而且fuzzy为yes
r3
redo的相关信息,这里我们可以看出当前redo的sequence为1366,first_scn为47711411,redo的写入顺序是redo01->redo02->redo03->redo01
r4
通过这里整体分析,我们可以知道,数据库为非正常关闭,恢复应该从redo03(sequence 1366)开始进行恢复,但是为什么出现ORA-00314呢？通过dump redo header继续分析

dump redo header 分析
这个里面我们可以看到redo01的sequence 为16进制554等于10进制的1364,scn的范围为:0x000002d6e4ab-0x000002d7455b
redo1

这个里面我们可以看到redo02的sequence 为16进制555等于10进制的1365,scn的范围为:0x000002d7455b-0x000002d804b3
redo2

这个属于异常redo,注意第一个seq: 0x00000556等于十进制的1366(也就是表示该redo的sequence为1366),”Seq# 0000001363,SCN 0x000002d5e1c6-0x000002d6e4ab”表示在redo的文件头有部分信息记录的为sequence为1633,另外这里表示该文件最大scn为0x000002d6e4ab,和redo01的最小scn(0x000002d6e4ab-0x000002d7455b)/redo01的”Prev scn: 0x0000.02d5e1c6″与现在看到的redo03中的最小scn匹配.
redo3

通过这里可以明白,在主机蓝屏的时候由于某种异常,导致redo03中的部分信息修改为了sequence为1366,但是部分信息依然保留它上次的sequence为1363的信息,导致数据库在重新恢复的时候无法正常成功.

处理方法
该故障是由于current redo异常导致,根据经验(具体参考:ORACLE REDO各种异常恢复),一般使用隐含参数屏蔽前滚,然后强制拉库,绝大部分情况能够拉库成功,如果人品不好可能需要使用其他隐含参数甚至bbed等方式处理

ORACLE 12C redo异常恢复测试—打上patch恢复完全

联系：手机/微信(+86 17813235971) QQ(107644445)

标题：ORACLE 12C redo异常恢复测试—打上patch恢复完全

作者：惜分飞©版权所有[未经本人同意,不得以任何形式转载,否则有进一步追究法律责任的权利.]

在上一篇中,我们删除redo,然后通过非常规方法使得cdb open成功,但是pdb无法正常mount,通过查询mos确定是bug 16784143,具体见:ORACLE 12C redo异常恢复测试—部分pdb未正常open,通过给数据库打上12.1.0.3的patch之后,发现已经损坏的数据库的pdb无法正常open,但是在损坏之前如果是打上补丁的数据库其pdb可以正常open
patch信息

C:\Users\XIFENFEI>E:\oracle\product\11.2.0\dbhome_1\OPatch\opatch lspatches
17977915;WINDOWS DB BUNDLE PATCH 12.1.0.1.3 (64bit): (17977915)

session 1

XIFENFEI_CDB$ROOT@SYS> show con_name;
CON_NAME
------------------------------
CDB$ROOT
XIFENFEI_CDB$ROOT@SYS> create table t_xifenfei as select * from dba_users;
表已创建。
XIFENFEI_CDB$ROOT@SYS> delete from t_xifenfei;
已删除 35 行。
XIFENFEI_CDB$ROOT@SYS>

session 2

XIFENFEI_CDB$ROOT@SYS> show con_name;
CON_NAME
------------------------------
PDB1
XIFENFEI_CDB$ROOT@SYS> create table t_xifenfei as select * from dba_users;
表已创建。
XIFENFEI_CDB$ROOT@SYS> delete from t_xifenfei;
已删除 36 行。
XIFENFEI_CDB$ROOT@SYS>

session 3

XIFENFEI_CDB$ROOT@SYS> alter session set container=pdb2;
会话已更改。
XIFENFEI_CDB$ROOT@SYS> alter database open;
数据库已更改。
XIFENFEI_CDB$ROOT@SYS> show con_name;
CON_NAME
------------------------------
PDB2
XIFENFEI_CDB$ROOT@SYS>

session 4

XIFENFEI_CDB$ROOT@SYS> shutdown abort;
ORACLE 例程已经关闭。

删除所有redo，并启动数据库

C:\Users\XIFENFEI>sqlplus / as sysdba
SQL*Plus: Release 12.1.0.1.0 Production on 星期日 3月 30 21:07:55 2014
Copyright (c) 1982, 2013, Oracle.  All rights reserved.
已连接到空闲例程。
idle> startup mount;
ORACLE 例程已经启动。
Total System Global Area  400846848 bytes
Fixed Size                  2440024 bytes
Variable Size             289408168 bytes
Database Buffers          100663296 bytes
Redo Buffers                8335360 bytes
数据库装载完毕。
idle> alter database open;
alter database open
*
第 1 行出现错误:
ORA-00313: 无法打开日志组 3 (用于线程 1) 的成员
ORA-00312: 联机日志 3 线程 1: 'E:\APP\XIFENFEI\ORADATA\XIFENFEI\REDO03.LOG'
ORA-27041: 无法打开文件
OSD-04002: 无法打开文件
O/S-Error: (OS 2) 系统找不到指定的文件。
尝试恢复数据库

idle> select status,group# from v$log;
STATUS               GROUP#
---------------- ----------
INACTIVE                  1
CURRENT                   3
INACTIVE                  2
idle> recover database until cancel;
ORA-00279: 更改 2821739 (在 03/30/2014 20:58:39 生成) 对于线程 1 是必需的
ORA-00289: 建议:
E:\APP\XIFENFEI\FAST_RECOVERY_AREA\XIFENFEI\ARCHIVELOG\2014_03_30\O1_MF_1_36_%U_
.ARC
ORA-00280: 更改 2821739 (用于线程 1) 在序列 #36 中
指定日志: {<RET>=suggested | filename | AUTO | CANCEL}
auto
ORA-00308: 无法打开归档日志
'E:\APP\XIFENFEI\FAST_RECOVERY_AREA\XIFENFEI\ARCHIVELOG\2014_03_30\O1_MF_1_36_%U
_.ARC'
ORA-27041: 无法打开文件
OSD-04002: 无法打开文件
O/S-Error: (OS 2) 系统找不到指定的文件。
ORA-00308: 无法打开归档日志
'E:\APP\XIFENFEI\FAST_RECOVERY_AREA\XIFENFEI\ARCHIVELOG\2014_03_30\O1_MF_1_36_%U
_.ARC'
ORA-27041: 无法打开文件
OSD-04002: 无法打开文件
O/S-Error: (OS 2) 系统找不到指定的文件。
ORA-01547: 警告: RECOVER 成功但 OPEN RESETLOGS 将出现如下错误
ORA-01194: 文件 1 需要更多的恢复来保持一致性
ORA-01110: 数据文件 1: 'E:\APP\XIFENFEI\ORADATA\XIFENFEI\SYSTEM01.DBF'
idle> alter database open resetlogs;
alter database open resetlogs
*
第 1 行出现错误:
ORA-01194: 文件 1 需要更多的恢复来保持一致性
ORA-01110: 数据文件 1: 'E:\APP\XIFENFEI\ORADATA\XIFENFEI\SYSTEM01.DBF'
idle> alter system set "_allow_resetlogs_corruption"=true scope=spfile;
系统已更改。
idle> shutdown immediate
ORA-01109: 数据库未打开
已经卸载数据库。
ORACLE 例程已经关闭。
idle> startup mount;
ORACLE 例程已经启动。
Total System Global Area  400846848 bytes
Fixed Size                  2440024 bytes
Variable Size             289408168 bytes
Database Buffers          100663296 bytes
Redo Buffers                8335360 bytes
数据库装载完毕。
idle> recover database until cancel;
ORA-00279: 更改 2821739 (在 03/30/2014 20:58:39 生成) 对于线程 1 是必需的
ORA-00289: 建议:
E:\APP\XIFENFEI\FAST_RECOVERY_AREA\XIFENFEI\ARCHIVELOG\2014_03_30\O1_MF_1_36_%U_
.ARC
ORA-00280: 更改 2821739 (用于线程 1) 在序列 #36 中
指定日志: {<RET>=suggested | filename | AUTO | CANCEL}
cancel
ORA-01547: 警告: RECOVER 成功但 OPEN RESETLOGS 将出现如下错误
ORA-01194: 文件 1 需要更多的恢复来保持一致性
ORA-01110: 数据文件 1: 'E:\APP\XIFENFEI\ORADATA\XIFENFEI\SYSTEM01.DBF'
ORA-01112: 未启动介质恢复
idle> alter database open resetlogs;
alter database open resetlogs
*
第 1 行出现错误:
ORA-01092: ORACLE instance terminated. Disconnection forced
ORA-00704: bootstrap process failure
ORA-00704: bootstrap process failure
ORA-00600: internal error code, arguments: [2662], [0], [2821746], [0],
[2822649], [4194545], [], [], [], [], [], []
进程 ID: 6880
会话 ID: 242 序列号: 3
idle> startup mount;
SP2-0642: SQL*Plus 内部错误状态 2133, 上下文 3114:0:0
继续执行将不安全
ORA-03114: 未连接到 ORACLE
--使用bbed解决dul问题，出现新问题
idle> 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: [4194], [61], [4], [], [], [], [],
[], [], [], [], []
进程 ID: 5932
会话 ID: 242 序列号: 3
idle> ALTER SYSTEM SET UNDO_MANAGEMENT='MANAUL' SCOPE=SPFILE;
系统已更改。
idle> SHUTDOWN IMMEDIATE;
ORA-01109: 数据库未打开
已经卸载数据库。
ORACLE 例程已经关闭。
idle> startup mount;
ORACLE 例程已经启动。
Total System Global Area  400846848 bytes
Fixed Size                  2440024 bytes
Variable Size             281019560 bytes
Database Buffers          109051904 bytes
Redo Buffers                8335360 bytes
数据库装载完毕。
idle> alter database open;
数据库已更改。
[/sql
<strong>open pdb</strong>

idle> alter session set container=pdb1;
会话已更改。
idle> alter database open;
数据库已更改。
idle> alter session set container=pdb2;
会话已更改。
idle> alter database open;
数据库已更改。
idle> alter session set container=pdb1;
会话已更改。

ORACLE 12C的bug估计不会太少，急于上12C的朋友，强烈建议打上最先patch,少踩一些雷

ORACLE 12C redo异常恢复测试—部分pdb未正常open

联系：手机/微信(+86 17813235971) QQ(107644445)

标题：ORACLE 12C redo异常恢复测试—部分pdb未正常open

作者：惜分飞©版权所有[未经本人同意,不得以任何形式转载,否则有进一步追究法律责任的权利.]

为了验证当前redo丢失的情况下ORACLE 12C CDB数据库恢复的情况,做了一个小实验，三个会话，分别操作为在root pdb中执行一个delete 不提交；另外一个会话在user pdb中delete记录不提交；最后一个会话中直接abort数据库，然后进行数据库恢复，验证数据库是否可以都正常open(所有pdb)
会话1(root pdb中操作)

CDB_CDB$ROOT@SYS> show pdbs;
    CON_ID CON_NAME                       OPEN MODE  RESTRICTED
---------- ------------------------------ ---------- ----------
         2 PDB$SEED                       READ ONLY  NO
         3 PDB                            READ WRITE NO
CDB_CDB$ROOT@SYS> show con_name
CON_NAME
------------------------------
CDB$ROOT
CDB_CDB$ROOT@SYS> create table t_xifenfei as select * from dba_objects;
表已创建。
CDB_CDB$ROOT@SYS> delete from t_xifenfei;
已删除 91032 行。
CDB_CDB$ROOT@SYS>

会话2(user pdb中操作)

CDB_CDB$ROOT@SYS> show con_name
CON_NAME
------------------------------
PDB
CDB_CDB$ROOT@SYS> drop table t_xifenfei purge;
表已删除。
CDB_CDB$ROOT@SYS> create table t_xifenfei as select * from dba_objects;
表已创建。
CDB_CDB$ROOT@SYS> delete from t_xifenfei;
已删除 91144 行。

会话3(直接abort数据库)

CDB_CDB$ROOT@SYS> shutdown abort;
ORACLE 例程已经关闭。

删除数据库联机日志

E:\app\XIFENFEI\oradata\cdb>dir redo*.log
 驱动器 E 中的卷是 本地磁盘
 卷的序列号是 000C-3B41
 E:\app\XIFENFEI\oradata\cdb 的目录
2013-08-07  01:41        52,429,312 REDO01.LOG
2013-08-07  01:40        52,429,312 REDO02.LOG
2013-08-07  01:40        52,429,312 REDO03.LOG
2014-03-20  22:47        52,432,896 REDO04.LOG
2014-03-20  22:47        52,432,896 REDO05.LOG
2014-03-20  22:47        52,432,896 REDO06.LOG
               6 个文件    314,586,624 字节
               0 个目录 21,359,374,336 可用字节
E:\app\XIFENFEI\oradata\cdb>del redo*.log
E:\app\XIFENFEI\oradata\cdb>dir redo*.log
 驱动器 E 中的卷是 本地磁盘
 卷的序列号是 000C-3B41
 E:\app\XIFENFEI\oradata\cdb 的目录
找不到文件

启动数据库报ORA-00313错误

idle> startup
ORACLE 例程已经启动。
Total System Global Area  521936896 bytes
Fixed Size                  2404552 bytes
Variable Size             205524792 bytes
Database Buffers          306184192 bytes
Redo Buffers                7823360 bytes
数据库装载完毕。
ORA-00313: 无法打开日志组 6 (用于线程 1) 的成员
ORA-00312: 联机日志 6 线程 1: 'E:\APP\XIFENFEI\ORADATA\CDB\REDO06.LOG'
ORA-27041: 无法打开文件
OSD-04002: 无法打开文件
O/S-Error: (OS 2) 系统找不到指定的文件。

使用_allow_resetlogs_corruption参数尝试open数据库

idle> shutdown abort
ORACLE 例程已经关闭。
idle> startup pfile='d:/pfile.txt' mount
ORACLE 例程已经启动。
Total System Global Area  521936896 bytes
Fixed Size                  2404552 bytes
Variable Size             205524792 bytes
Database Buffers          306184192 bytes
Redo Buffers                7823360 bytes
数据库装载完毕。
idle> show parameter resetlogs;
NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
_allow_resetlogs_corruption          boolean     TRUE
idle> recover database until cancel;
ORA-00279: 更改 12696935641735 (在 03/20/2014 22:38:52 生成) 对于线程 1
是必需的
ORA-00289: 建议:
E:\APP\XIFENFEI\FAST_RECOVERY_AREA\CDB\ARCHIVELOG\2014_03_20\O1_MF_1_872_9LOZSK9
X_.ARC
ORA-00280: 更改 12696935641735 (用于线程 1) 在序列 #872 中
指定日志: {<RET>=suggested | filename | AUTO | CANCEL}
cancel
ORA-01547: 警告: RECOVER 成功但 OPEN RESETLOGS 将出现如下错误
ORA-01194: 文件 1 需要更多的恢复来保持一致性
ORA-01110: 数据文件 1: 'E:\APP\XIFENFEI\ORADATA\CDB\SYSTEM01.DBF'
ORA-01112: 未启动介质恢复
idle> alter database open resetlogs;
alter database open resetlogs
*
第 1 行出现错误:
ORA-00603: ORACLE server session terminated by fatal error
ORA-00600: internal error code, arguments: [2662], [2956], [1012314778],
[2956], [1012314903], [268435600], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [2662], [2956], [1012314777],
[2956], [1012314903], [268435600], [], [], [], [], [], []
ORA-01092: ORACLE instance terminated. Disconnection forced
ORA-00600: internal error code, arguments: [2662], [2956], [1012314768],
[2956], [1012314903], [268435600], [], [], [], [], [], []
进程 ID: 9268
会话 ID: 92 序列号: 3

ora-600[2662]很熟悉，文件头的scn小于文件中某个block的csn，通过bbed等工具修改文件scn，尝试启动数据库

CDB_CDB$ROOT@SYS> SHUTDOWN ABORT
ORACLE 例程已经关闭。
CDB_CDB$ROOT@SYS> STARTUP
ORACLE 例程已经启动。
Total System Global Area  521936896 bytes
Fixed Size                  2404552 bytes
Variable Size             205524792 bytes
Database Buffers          306184192 bytes
Redo Buffers                7823360 bytes
数据库装载完毕。
数据库已经打开。

尝试open user pdb

CDB_CDB$ROOT@SYS> alter session set container=pdb;
会话已更改。
CDB_CDB$ROOT@SYS> alter database open;
alter database open
*
第 1 行出现错误:
ORA-00600: 内部错误代码, 参数: [kcvfdb_pdb_set_clean_scn: cleanckpt], [3],
[2956], [1012312995], [2956], [1012334778], [2], [], [], [], [], []

查询mos得到结论:
Bug 16784143 ORA-600 [kcvfdb_pdb_set_clean_scn: cleanckpt] with PDBs
在12.2/12.1.0.2/12.1.0.1.1中修复，后续尝试打patch,来进一步恢复.
1

测试结果证明
1.root pdb的open过程和以前版本数据库无大差异,但是scn推进比较费劲,以前的event和隐含参数方法无效
2.user pdb再是看是因为bug无法open,后续继续验证
3.12.1的base 版本可能确实问题很多，生产使用慎重

ORACLE REDO各种异常恢复

联系：手机/微信(+86 17813235971) QQ(107644445)

标题：ORACLE REDO各种异常恢复

作者：惜分飞©版权所有[未经本人同意,不得以任何形式转载,否则有进一步追究法律责任的权利.]

redo是oracle数据库比较核心文件,当redo异常之后,数据库无法正常启动,而且有丢失数据的风险,强烈建议条件允许redo多路镜像.redo文件异常的故障可以说是千奇百怪,但是总体上可以分为几类:
数据库归档/非归档模式下inactive redo异常
ORA-00316 ORA-00327

SQL> startup mount
ORACLE instance started.
Total System Global Area  260046848 bytes
Fixed Size                  1266896 bytes
Variable Size              83888944 bytes
Database Buffers          167772160 bytes
Redo Buffers                7118848 bytes
Database mounted.
SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-00316: log 2 of thread 1, type  in header is not log file
ORA-00312: online log 2 thread 1: '/u01/oracle/oradata/XFF/redo02.log'
SQL> col member for a40
SQL> set lines 120
SQL>   SELECT thread#,
  2           a.sequence#,
  3           a.group#,
  4           TO_CHAR (first_change#, '9999999999999999') "SCN",
  5           a.status,
  6           MEMBER
  7      FROM v$log a, v$logfile b
  8     WHERE a.group# = B.GROUP#
  9  ORDER BY a.sequence# DESC;
   THREAD#  SEQUENCE#     GROUP# SCN               STATUS           MEMBER
---------- ---------- ---------- ----------------- ---------------- -----------------------------------
         1         15          3            665697 CURRENT          /u01/oracle/oradata/XFF/redo03.log
         1         14          2            645619 INACTIVE         /u01/oracle/oradata/XFF/redo02.log
         1         13          1            625540 INACTIVE         /u01/oracle/oradata/XFF/redo01.log
SQL> ALTER DATABASE CLEAR LOGFILE GROUP 2;
Database altered.
SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-00327: log 2 of thread 1, physical size  less than needed
ORA-00312: online log 2 thread 1: '/u01/oracle/oradata/XFF/redo02.log'
SQL> alter database drop logfile group 2;
Database altered.
SQL> alter database open;
Database altered.
SQL> alter database add logfile group 2 ('/u01/oracle/oradata/XFF/redo02.log') size 50M reuse;
Database altered.

正常关闭数据库current redo异常
ORA-00316 ORA-01623

SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-00316: log 1 of thread 1, type  in header is not log file
ORA-00312: online log 1 thread 1: '/u01/oracle/oradata/XFF/redo01.log'
SQL>   SELECT thread#,
  2           a.sequence#,
  3           a.group#,
  4           TO_CHAR (first_change#, '9999999999999999') "SCN",
  5           a.status,
  6           MEMBER
  7      FROM v$log a, v$logfile b
  8     WHERE a.group# = B.GROUP#
  9  ORDER BY a.sequence# DESC;
   THREAD#  SEQUENCE#     GROUP# SCN               STATUS           MEMBER
---------- ---------- ---------- ----------------- ---------------- ----------------------------------
         1         16          1            685918 CURRENT          /u01/oracle/oradata/XFF/redo01.log
         1         15          3            665697 INACTIVE         /u01/oracle/oradata/XFF/redo03.log
         1          0          2                 0 UNUSED           /u01/oracle/oradata/XFF/redo02.log
SQL> ALTER DATABASE CLEAR LOGFILE GROUP 1;
ALTER DATABASE CLEAR LOGFILE GROUP 1
*
ERROR at line 1:
ORA-00316: log 1 of thread 1, type 0 in header is not log file
ORA-00312: online log 1 thread 1: '/u01/oracle/oradata/XFF/redo01.log'
SQL> ALTER DATABASE drop logfile group 1;
ALTER DATABASE drop logfile group 1
*
ERROR at line 1:
ORA-01623: log 1 is current log for instance XFF (thread 1) - cannot drop
ORA-00312: online log 1 thread 1: '/u01/oracle/oradata/XFF/redo01.log'
SQL> recover database until cancel;
Media recovery complete.
SQL> alter database open resetlogs;
Database altered.

数据库异常关闭current/active redo异常
ORA-00316 ORA-01624 ORA-01194

SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-00316: log 1 of thread 1, type 0 in header is not log file
ORA-00312: online log 1 thread 1: '/u01/oracle/oradata/XFF/redo01.log'
SQL>   SELECT thread#,
  2           a.sequence#,
  3           a.group#,
  4           TO_CHAR (first_change#, '9999999999999999') "SCN",
  5           a.status,
  6           MEMBER
  7      FROM v$log a, v$logfile b
  8     WHERE a.group# = B.GROUP#
  9  ORDER BY a.sequence# DESC;
   THREAD#  SEQUENCE#     GROUP# SCN               STATUS           MEMBER
---------- ---------- ---------- ----------------- ---------------- -----------------------------------
         1          8          2            686310 CURRENT          /u01/oracle/oradata/XFF/redo02.log
         1          7          1            686294 ACTIVE           /u01/oracle/oradata/XFF/redo01.log
         1          6          3            686289 INACTIVE         /u01/oracle/oradata/XFF/redo03.log
SQL> ALTER DATABASE CLEAR LOGFILE GROUP 1;
ALTER DATABASE CLEAR LOGFILE GROUP 1
*
ERROR at line 1:
ORA-01624: log 1 needed for crash recovery of instance XFF (thread 1)
ORA-00312: online log 1 thread 1: '/u01/oracle/oradata/XFF/redo01.log'
SQL> ALTER DATABASE drop logfile group 1;
ALTER DATABASE drop logfile group 1
*
ERROR at line 1:
ORA-01624: log 1 needed for crash recovery of instance XFF (thread 1)
ORA-00312: online log 1 thread 1: '/u01/oracle/oradata/XFF/redo01.log'
SQL> recover database until cancel
ORA-00279: change 686294 generated at 04/20/2013 01:37:16 needed for thread 1
ORA-00289: suggestion : /u01/oracle/oracle/product/10.2.0/db_1/dbs/arch1_7_813202529.dbf
ORA-00280: change 686294 for thread 1 is in sequence #7
Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
/u01/oracle/oradata/XFF/redo01.log
ORA-00308: cannot open archived log '/u01/oracle/oradata/XFF/redo01.log'
ORA-27047: unable to read the header block of file
Additional information: 2
Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
cancel
ORA-01547: warning: RECOVER succeeded but OPEN RESETLOGS would get error below
ORA-01194: file 1 needs more recovery to be consistent
ORA-01110: data file 1: '/u01/oracle/oradata/XFF/system01.dbf'
ORA-01112: media recovery not started
SQL> alter database open resetlogs;
alter database open resetlogs
*
ERROR at line 1:
ORA-01194: file 1 needs more recovery to be consistent
ORA-01110: data file 1: '/u01/oracle/oradata/XFF/system01.dbf'
SQL> alter system set "_allow_resetlogs_corruption"=true scope=spfile;
System altered.
SQL> shutdown immediate;
ORA-01109: database not open
Database dismounted.
ORACLE instance shut down.
SQL> startup mount;
ORACLE instance started.
Total System Global Area  260046848 bytes
Fixed Size                  1266896 bytes
Variable Size              83888944 bytes
Database Buffers          167772160 bytes
Redo Buffers                7118848 bytes
Database mounted.
SQL> recover database until cancel
ORA-00279: change 686294 generated at 04/20/2013 01:37:16 needed for thread 1
ORA-00289: suggestion : /u01/oracle/oracle/product/10.2.0/db_1/dbs/arch1_7_813202529.dbf
ORA-00280: change 686294 for thread 1 is in sequence #7
Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
cancel
ORA-01547: warning: RECOVER succeeded but OPEN RESETLOGS would get error below
ORA-01194: file 1 needs more recovery to be consistent
ORA-01110: data file 1: '/u01/oracle/oradata/XFF/system01.dbf'
ORA-01112: media recovery not started
SQL> alter database open resetlogs;
Database altered.

在这样的情况下,数据库异常关闭,current/active redo异常,通过使用隐含参数可能可以侥幸的恢复数据库,但是也可能导致数据丢失.这里因为是模拟情况,无业务所以在很多较为繁忙的业务系统中,使用隐含参数resetlogs过程中可能还会遇到如下很多常见的错误,进一步增加了恢复难度

current/active redo异常后附带其他错误
ORA-600[2662]

Wed Dec 07 13:02:49 2011
SMON: enabling cache recovery
Errors in file d:\app\administrator\diag\rdbms\hzyl\hzyl\trace\hzyl_ora_3388.trc  (incident=216664):
ORA-00600: 内部错误代码, 参数: [2662], [2], [1153862134], [2], [1153864845], [12582921], [], []
Incident details in: d:\app\administrator\diag\rdbms\hzyl\hzyl\incident\incdir_216664\hzyl_ora_3388_i216664.trc
Errors in file d:\app\administrator\diag\rdbms\hzyl\hzyl\trace\hzyl_ora_3388.trc:
ORA-00600: 内部错误代码, 参数: [2662], [2], [1153862134], [2], [1153864845], [12582921], [], []
Error 600 happened during db open, shutting down database
USER (ospid: 3388): terminating the instance due to error 600

ORA-00600[4000]

Thu Feb 28 19:29:10 2013
SMON: enabling cache recovery
Thu Feb 28 19:29:11 2013
Errors in file /u1/PROD/prodora/db/tech_st/10.2.0/admin/PROD_oracle/udump/prod_ora_20989.trc:
ORA-00600: internal error code, arguments: [4000], [50], [], [], [], [], [], []
Thu Feb 28 19:29:13 2013
Incremental checkpoint up to RBA [0x1.3.0], current log tail at RBA [0x1.3.0]
Thu Feb 28 19:29:13 2013
Errors in file /u1/PROD/prodora/db/tech_st/10.2.0/admin/PROD_oracle/udump/prod_ora_20989.trc:
ORA-00704: bootstrap process failure
ORA-00704: bootstrap process failure
ORA-00600: internal error code, arguments: [4000], [50], [], [], [], [], [], []

ORA-00704 ORA-00604 ORA-01555

Fri May  4 21:04:21 2012
select ctime, mtime, stime from obj$ where obj# = :1
Fri May  4 21:04:21 2012
Errors in file /oracle/admin/standdb/udump/perfdb_ora_1286288.trc:
ORA-00704: bootstrap process failure
ORA-00704: bootstrap process failure
ORA-00604: error occurred at recursive SQL level 1
ORA-01555: snapshot too old: rollback segment number 40 with name "_SYSSMU40$" too small
Error 704 happened during db open, shutting down database
USER: terminating instance due to error 704
Instance terminated by USER, pid = 1286288
ORA-1092 signalled during: alter database open resetlogs...

current/active redo异常还可能报如下错误
redo文件损坏报错

Started redo scan
Errors in file d:\app\administrator\diag\rdbms\hzyl\hzyl\trace\hzyl_ora_2960.trc  (incident=214262):
ORA-00353: 日志损坏接近块 12014 更改 9743799889 时间 12/05/2011 09:21:11
ORA-00312: 联机日志 3 线程 1: 'R:\ORADATA\HZYL\REDO03.LOG'
Incident details in: d:\app\administrator\diag\rdbms\hzyl\hzyl\incident\incdir_214262\hzyl_ora_2960_i214262.trc
Aborting crash recovery due to error 368
Errors in file d:\app\administrator\diag\rdbms\hzyl\hzyl\trace\hzyl_ora_2960.trc:
ORA-00368: 重做日志块中的校验和错误
ORA-00353: 日志损坏接近块 12014 更改 9743799889 时间 12/05/2011 09:21:11
ORA-00312: 联机日志 3 线程 1: 'R:\ORADATA\HZYL\REDO03.LOG'
ORA-368 signalled during: ALTER DATABASE OPEN...

redo文件被其他实例占用报错

Wed May 16 17:03:11 2012
Started redo scan
Wed May 16 17:03:11 2012
Errors in file /oracle/admin/odsdb/udump/odsdb1_ora_2040024.trc:
ORA-00305: log 14 of thread 1 inconsistent; belongs to another database
ORA-00312: online log 14 thread 1: '/dev/rods_redo1_2_2'
ORA-00305: log 14 of thread 1 inconsistent; belongs to another database
ORA-00312: online log 14 thread 1: '/dev/rods_redo1_2_1'
ORA-305 signalled during: ALTER DATABASE OPEN...

存储整体异常

Mon Oct 17 09:35:09 2011
Errors in file /oracle/app/admin/orcl/bdump/orcl2_lgwr_348814.trc:
ORA-00340: IO error processing online log 4 of thread 2
ORA-00345: redo log write error block 6732 count 2
ORA-00312: online log 4 thread 2: '/dev/rredo21'
ORA-27063: number of bytes read/written is incorrect
IBM AIX RISC System/6000 Error: 6: No such device or address
Additional information: -1
Additional information: 1024
Mon Oct 17 09:35:09 2011
LGWR: terminating instance due to error 340

存储IO异常

Fri Feb 21 08:44:42 2014
Thread 1 advanced to log sequence 591 (LGWR switch)
  Current log# 1 seq# 591 mem# 0: J:\ORADATA\ORCL\REDO01.LOG
Fri Feb 21 15:31:20 2014
Errors in file c:\oracle\product\10.2.0\admin\orcl\bdump\orcl_lgwr_10312.trc:
ORA-00316: log 1 of thread 1, type 286 in header is not log file
ORA-00312: online log 1 thread 1: 'J:\ORADATA\ORCL\REDO01.LOG'

使用_disable_logging参数

Sat May 14 23:16:49 2005
Errors in file d:\oracle\admin\rman\bdump\rman_arc0_736.trc:
ORA-16038: log 3 sequence# 72 cannot be archived
ORA-00354: corrupt redo log block header
ORA-00312: online log 3 thread 1: 'D:\ORACLE\ORADATA\RMAN\REDO03.LOG'

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姊妹篇
undo异常总结和恢复思路
ORACLE丢失各种文件导致数据库不能OPEN恢复