記數據庫數據文件損壞恢復ORA-00376+ORA-01110

　　現象：業務平台無法登陸，日志報錯為ORACLE的錯誤。

　　查看oracle日志的報錯，

ORA-00376: file 5 cannot be read at this time
ORA-01110: data file 5: '/oradata/users02.dbf'

　　看一下oracle狀態，

SQL> select status from v$instance;

STATUS
------------
OPEN

　　奇怪了，數據庫狀態正常，還報錯，應該是數據文件有問題，查一下數據文件的SCN，發現確實是datafile 5有問題，其SCN與其他的不一致。

 

　　接下來開始要恢復了。嘗試恢復數據文件5，

SQL> recovere datafile 5;
SP2-0734: unknown command beginning "recovere d..." - rest of line ignored.
SQL> recover datafile 5;
ORA-00279: change 14945741822997 generated at 03/22/2018 22:13:55 needed for
thread 1
ORA-00289: suggestion :
/usr/local/oracle/flash_recovery_area/ORCL/archivelog/2018_03_26/o1_mf_1_298748_
%u_.arc
ORA-00280: change 14945741822997 for thread 1 is in sequence #298748


Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
redo03.log;
ORA-00308: cannot open archived log 'redo03.log;'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3

　　加上until cancle參數再次嘗試恢復，恢復數據原則要進程不斷嘗試

SQL> recover datafile 5 until cancel;
ORA-00274: illegal recovery option UNTIL

　　嘗試將數據文件5 online，

SQL> alter database datafile 5 online;
alter database datafile 5 online
*
ERROR at line 1:
ORA-01113: file 5 needs media recovery
ORA-01110: data file 5: '/oradata/users02.dbf'

　　這里報錯，應該是數據庫已經OPEN了，無法進行數據文件恢復。將數據庫關閉，啟動至mount狀態，

SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup mount;
ORACLE instance started.

Total System Global Area 6747725824 bytes
Fixed Size                  2213976 bytes
Variable Size            4160751528 bytes
Database Buffers         2550136832 bytes
Redo Buffers               34623488 bytes
Database mounted.

　　再次加上until cancle參數再次嘗試恢復，

SQL> recover database until cancel;
Media recovery complete.

　　打開數據庫，完成介質恢復，

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;

Database altered.

SQL> select status from v$instance;

STATUS
------------
OPEN

　　這時，介質恢復應該就完成了，再去查一下SCN，

SQL> select checkpoint_change# from v$datafile;

CHECKPOINT_CHANGE#
------------------
        1.4946E+13
        1.4946E+13
        1.4946E+13
        1.4946E+13
        1.4946E+13
        1.4946E+13
        1.4946E+13
        1.4946E+13
        1.4946E+13
        1.4946E+13
        1.4946E+13

CHECKPOINT_CHANGE#
------------------
        1.4946E+13
        1.4946E+13
        1.4946E+13

14 rows selected.

SQL> 

　　

一致了，驗證一下業務平台，正常了。