操作系统: RHEL5.8 x64
数据库  : Oracle 10.2.0.5.0
故障情况:
一台单机曙光PC服务器4块300G SAS盘，RAID5坏两块磁盘（服务器面板无故障提示，无人发现），造成RAID5磁盘阵列挂掉，操作系统当机，系统无法启动。经过数据恢复公司将磁盘数据恢复后，重新恢复数据文件，启动数据库时发现如下错误提示：

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1. 数据库警告日志

tail -f alert_orcl.log

Database mounted in Exclusive Mode
Completed: ALTER DATABASE   MOUNT
Sat Sep 16 02:32:44 CST 2017
ALTER DATABASE OPEN
Sat Sep 16 02:32:44 CST 2017
Beginning crash recovery of 1 threads
 parallel recovery started with 2 processes
Sat Sep 16 02:32:44 CST 2017
Started redo scan
Sat Sep 16 02:32:44 CST 2017
Errors in file /u01/app/oracle/admin/orcl/udump/orcl_ora_27990.trc:
ORA-00313: open failed for members of log group 3 of thread 1
ORA-00312: online log 3 thread 1: '/u01/app/oracle/oradata/orcl/redo03.log'
ORA-27046: file size is not a multiple of logical block size
Additional information: 1
Sat Sep 16 02:32:44 CST 2017
Aborting crash recovery due to error 313
Sat Sep 16 02:32:44 CST 2017
Errors in file /u01/app/oracle/admin/orcl/udump/orcl_ora_27990.trc:
ORA-00313: open failed for members of log group 3 of thread 1
ORA-00312: online log 3 thread 1: '/u01/app/oracle/oradata/orcl/redo03.log'
ORA-27046: file size is not a multiple of logical block size
Additional information: 1
ORA-313 signalled during: ALTER DATABASE OPEN...

2. 启动时提示

[oracle@tcdb ~]$ sqlplus / as sysdba;

SQL*Plus: Release 10.2.0.5.0 - Production on 6 02:28:33 2017

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

Connected to an idle instance.

SQL> startup;
ORACLE instance started.

Total System Global Area 1610612736 bytes
Fixed Size                  2096632 bytes
Variable Size             553648648 bytes
Database Buffers         1040187392 bytes
Redo Buffers               14680064 bytes
Database mounted.
ORA-00313: open failed for members of log group 3 of thread 1
ORA-00312: online log 3 thread 1: '/u01/app/oracle/oradata/orcl/redo03.log'
ORA-27046: file size is not a multiple of logical block size
Additional information: 1

SQL>

根据情况是数据库非规档，redo文件损坏，故障时早上7点时间。

SQL> select open_mode from v$database;

OPEN_MODE
----------
MOUNTED

SQL> set pagesize 999;
SQL> set linesize 200;
SQL> alter session set nls_date_format='yyyy-mm-dd hh34:mi:ss';
Session altered.

SQL> select * from v$log;

    GROUP#    THREAD#  SEQUENCE#      BYTES    MEMBERS ARC STATUS           FIRST_CHANGE# FIRST_TIME
---------- ---------- ---------- ---------- ---------- --- ---------------- ------------- -------------------
         1          1       3406   52428800          1 NO  INACTIVE             187001363 2017-08-20 07:02:30
         3          1       3408   52428800          1 NO  CURRENT              187084379 2017-08-21 07:03:24
         2          1       3407   52428800          1 NO  INACTIVE             187044837 2017-08-20 19:40:06

当前日志损坏

SQL>
SQL> create pfile from spfile;

File created.

在pfile中加入隐含参数：
*._allow_resetlogs_corruption=true
*._allow_error_simulation=true

SQL> startup mount pfile='/u01/app/oracle/product/10.2.0/db_1/dbs/initorcl.ora'
ORACLE instance started.

Total System Global Area 1610612736 bytes
Fixed Size                  2096632 bytes
Variable Size             553648648 bytes
Database Buffers         1040187392 bytes
Redo Buffers               14680064 bytes
Database mounted.

再次尝试resetlogs打开数据库

SQL> alter database open resetlogs;
alter database open resetlogs
*
ERROR at line 1:
ORA-01139: RESETLOGS option only valid after an incomplete database recovery

SQL> recover database until cancel;
ORA-00279: change 187084379 generated at 08/21/2017 07:03:24 needed for thread 1
ORA-00289: suggestion : /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2017_10_18/o1_mf_1_3408_%u_.arc
ORA-00280: change 187084379 for thread 1 is in sequence #3408

Specify log: {=suggested | filename | AUTO | CANCEL}
auto
ORA-00308: cannot open archived log '/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2017_10_18/o1_mf_1_3408_%u_.arc'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3

ORA-00308: cannot open archived log '/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2017_10_18/o1_mf_1_3408_%u_.arc'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3

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/app/oracle/oradata/orcl/system01.dbf'

SQL> alter database open resetlogs;
alter database open resetlogs
*
ERROR at line 1:
ORA-00603: ORACLE server session terminated by fatal error

alter日志报如下错误：

Wed Oct 18 03:06:38 CST 2017
Errors in file /u01/app/oracle/admin/orcl/udump/orcl_ora_18057.trc:
ORA-00600: internal error code, arguments: [2662], [0], [187086068], [0], [187092671], [8388617], [], []
ORA-01092: ORACLE instance terminated. Disconnection forced
ORA-00600: internal error code, arguments: [2662], [0], [187086066], [0], [187092671], [8388617], [], []
Wed Oct 18 03:06:39 CST 2017
Errors in file /u01/app/oracle/admin/orcl/udump/orcl_ora_18057.trc:
ORA-00600: internal error code, arguments: [2662], [0], [187086069], [0], [187092671], [8388617], [], []
ORA-00600: internal error code, arguments: [2662], [0], [187086068], [0], [187092671], [8388617], [], []
ORA-01092: ORACLE instance terminated. Disconnection forced
ORA-00600: internal error code, arguments: [2662], [0], [187086066], [0], [187092671], [8388617], [], []
Wed Oct 18 03:06:40 CST 2017
Errors in file /u01/app/oracle/admin/orcl/udump/orcl_ora_18057.trc:
ORA-00600: internal error code, arguments: [2662], [0], [187086069], [0], [187092671], [8388617], [], []
ORA-00600: internal error code, arguments: [2662], [0], [187086068], [0], [187092671], [8388617], [], []
ORA-01092: ORACLE instance terminated. Disconnection forced
ORA-00600: internal error code, arguments: [2662], [0], [187086066], [0], [187092671], [8388617], [], []

[2662]需要推进SCN，使SCN到一致的状态。

SQL> conn /as sysdba
Connected to an idle instance.

SQL>  startup mount pfile='/u01/app/oracle/product/10.2.0/db_1/dbs/initorcl.ora';
ORACLE instance started.

Total System Global Area  167772160 bytes
Fixed Size                  1272600 bytes
Variable Size              96470248 bytes
Database Buffers           67108864 bytes
Redo Buffers                2920448 bytes
Database mounted.

SQL> alter session set events '10015 trace name adjust_scn level 1';
Session altered.

SQL> alter database open;
Database altered.

注：之后要去掉两个参数，create spfile from pfile;

数据库正常启动，当前redo日志损坏，理论上会造成数据丢失，考虑到早7点，应用未有业务数据产生，观察应用以及测试功能正常，故未对数据库进行逻辑重建。

本文题目：Oracle10.2.0.5非归档currentredolog损坏处理一例
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