原来asm的数据库，我使用rman做了备份，然后在文件系统中，我恢复了该数据库，但是重新启动数据库后，
发现数据库无法打开了。具体过程如下：
我重新启动数据库后，发现数据库无法open,在alert.log发现如下错误：ora-38760具体出错如下：
ALTER DATABASE MOUNT
Fri Aug 15 23:42:08 2008
Setting recovery target incarnation to 1
Fri Aug 15 23:42:08 2008
Successful mount of redo thread 1, with mount id 1128950988
Fri Aug 15 23:42:08 2008
Allocated 3981204 bytes in shared pool for flashback generation buffer
Starting background process RVWR
RVWR started with pid=14, OS id=11702
Fri Aug 15 23:42:09 2008
Errors in file /oracle/admin/antiper/bdump/antiper_rvwr_11702.trc:
ORA-38701: Message 38701 not found; No message file for product=RDBMS, facility=ORA; arguments: [1] [1] [1] [/oracle/recv/ANTIPER/flashback/o1_mf_4bby739w_.flb]
ORA-27037: Message 27037 not found; No message file for product=RDBMS, facility=ORA
Linux Error: 2: No such file or directory
Additional information: 3
Fri Aug 15 23:42:09 2008
Database mounted in Exclusive Mode
Completed: ALTER DATABASE MOUNT
Fri Aug 15 23:42:09 2008
ALTER DATABASE OPEN
ORA-38760 signalled during: ALTER DATABASE OPEN...
从错误的内容中可以发现，闪回数据库能够mount，但是在mount过程中出现错误，估计是闪回日志的路径指定不正确，而在打开数据库的时候可能需要写闪回日志，因此数据库只能mount而无法打开数据库。
[oracle@ora10g bdump]$ oerr ora 38760
38760, 00000, "This database instance failed to turn on flashback database"
// *Cause: Database flashback is on but this instance failed to
// start generating flashback data. Look in alert log for more
// specific errors.
// *Action: Correct the error or turn off database flashback.
这个时候我立即检查闪回的数据库相关参数：
SQL> show parameter db_re
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_recovery_file_dest string /oracle/recv
db_recovery_file_dest_size big integer 3G
db_recycle_cache_size big integer 0
数据库参数是好的呀。
我实在没办法了，将闪回功能关闭吧，然后看是否可以打开数据库呢？
SQL> alter database flashback off;
Database altered.
SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-01589: must use RESETLOGS or NORESETLOGS option for database open
SQL> alter database open resetlogs
2 ;
alter database open resetlogs
*
ERROR at line 1:
ORA-01157: cannot identify/lock data file 1 - see DBWR trace file
ORA-01110: data file 1: '+DISKGP1/antiper/datafile/system.260.662520081'
这种情况下我是没有办法了，oracle真的是很不智能啊，因为这个数据库我是使用rman进行备份与恢复的，而在rman恢复之后，数据库也是打开了，记得使用rman恢复时，因为原来数据库是使用asm的存储结构，而现在使用的是普通的文件系统，因此使用了类似如下的方式进行恢复：
RUN
{
ALLOCATE CHANNEL dev1 DEVICE TYPE DISK;
ALLOCATE CHANNEL dev2 DEVICE TYPE sbt;
SQL "ALTER TABLESPACE tbs_1 OFFLINE IMMEDIATE";
SET NEWNAME FOR DATAFILE '/disk7/oracle/tbs11.f'
TO '/disk9/oracle/tbs11.f';
RESTORE TABLESPACE tbs_1;
SWITCH DATAFILE ALL;
RECOVER TABLESPACE tbs_1;
SQL "ALTER TABLESPACE tbs_1 ONLINE";
}
但是在数据库打开后，使用上述方式还原数据库后，控制文件没有修改，因此在重新启动数据库后，控制文件与实际数据库文件不一致，因此出现本次的数据库故障。
当我使用命令修改了控制文件的路径后，打开数据库仍然出现错误。
alter database rename file '+DISKGP1/antiper/onlinelog/group_1.257.662520073' to '/oracle/oradata/redo01.log';
alter database rename file '+DISKGP1/antiper/onlinelog/group_2.258.662520073' to '/oracle/oradata/redo02.log';
alter database rename file '+DISKGP1/antiper/onlinelog/group_3.259.662520075' to '/oracle/oradata/redo03.log';
alter database rename file '+DISKGP1/antiper/datafile/system.260.662520081' to '/oracle/oradata/system01.dbf';
alter database rename file '+DISKGP1/antiper/datafile/users03.dbf' to '/oracle/oradata/users03.dbf';
alter database rename file '+DISKGP1/antiper/datafile/sysaux.262.662520107' to '/oracle/oradata/sysaux01.dbf';
alter database rename file '+DISKGP1/antiper/datafile/users.264.662520137' to '/oracle/oradata/users01.dbf';
alter database rename file '+DISKGP1/antiper/datafile/undotbs201.dbf' to '/oracle/oradata/undotbs01.dbf';
alter database rename file '+DISKGP1/antiper/datafile/user02.dbf' to '/oracle/oradata/users02.dbf';
SQL> alter database open resetlogs;
alter database open resetlogs
*
ERROR at line 1:
ORA-01190: control file or data file 1 is from before the last RESETLOGS
ORA-01110: data file 1: '/oracle/oradata/system01.dbf'
----于是我想到了重新建立控制文件吧。哈哈
再次trace控制文件吧
SQL> alter database backup controlfile to trace as '/oracle/aa.txt';
----截取创建控制文件的脚本。
CREATE CONTROLFILE REUSE DATABASE "ANTIPER" NORESETLOGS ARCHIVELOG
MAXLOGFILES 16
MAXLOGMEMBERS 3
MAXDATAFILES 100
MAXINSTANCES 8
MAXLOGHISTORY 292
LOGFILE
GROUP 1 '/oracle/oradata/redo01.log' SIZE 50M,
GROUP 2 '/oracle/oradata/redo02.log' SIZE 50M,
GROUP 3 '/oracle/oradata/redo03.log' SIZE 50M
DATAFILE
'/oracle/oradata/system01.dbf',
'/oracle/oradata/users03.dbf',
'/oracle/oradata/sysaux01.dbf',
'/oracle/oradata/users01.dbf',
'/oracle/oradata/undotbs01.dbf',
'/oracle/oradata/users02.dbf'
CHARACTER SET ZHS16GBK;
执行后出现如下错误：
CREATE CONTROLFILE REUSE DATABASE "ANTIPER" NORESETLOGS ARCHIVELOG
*
ERROR at line 1:
ORA-01503: CREATE CONTROLFILE failed
ORA-01565: error in identifying file '/oracle/oradata/redo01.log'
ORA-27037: unable to obtain file status
Linux Error: 2: No such file or directory
Additional information: 3
仔细推敲下是因为日志文件不存在，而使用noresetlogs方式去创建控制文件的时候，会检查日志文件，因此需要使用
noresetlogs的方式去创建控制文件。
CREATE CONTROLFILE REUSE DATABASE "ANTIPER" RESETLOGS ARCHIVELOG
MAXLOGFILES 16
MAXLOGMEMBERS 3
MAXDATAFILES 100
MAXINSTANCES 8
MAXLOGHISTORY 292
LOGFILE
GROUP 1 '/oracle/oradata/redo01.log' SIZE 50M,
GROUP 2 '/oracle/oradata/redo02.log' SIZE 50M,
GROUP 3 '/oracle/oradata/redo03.log' SIZE 50M
DATAFILE
'/oracle/oradata/system01.dbf',
'/oracle/oradata/users03.dbf',
'/oracle/oradata/sysaux01.dbf',
'/oracle/oradata/users01.dbf',
'/oracle/oradata/undotbs01.dbf',
'/oracle/oradata/users02.dbf'
CHARACTER SET ZHS16GBK;
---显示创建控制文件成功。然后打开数据库
SQL> alter database open resetlogs;
Database altered.
至此本次数据库的故障处理完毕了。
下面我们重新打开数据库的闪回功能。
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup mount
ORACLE instance started.
Total System Global Area 146800640 bytes
Fixed Size 1218196 bytes
Variable Size 75499884 bytes
Database Buffers 67108864 bytes
Redo Buffers 2973696 bytes
Database mounted.
----设置数据库闪回的步骤：
rvwr进程定时将flashback logs写进闪回日志。包含设置参数的先后顺序，需要在mount状态下执行如下脚本。
设置闪回日志顺序：
设置恢复目录
alter system set db_recovery_file_dest=
设置恢复目录大小
alter system set db_recovery_file_dest_size=
设置恢复目录保存时间
alter system set db_flashback_retention=
启用恢复目录
alter database flashback on
SQL> alter database flashback on;
Database altered.
SQL> alter database open;
Database altered.
---因为重新创建过控制文件，因此需要重新增加临时表空间的数据文件
SQL> alter tablespace temp add tempfile '/oracle/oradata/temp01.dbf' size 100M autoextend off;
Tablespace altered。
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