undo文件丢失或损坏

startup mount

cp +DATA/ora11g/datafile/undotbs1.dbf

alter database rename file

'+DATA/ora11g/datafile/undotbs1.258.833721555' to '+DATA/ora11g/datafile/undotbs1.dbf';

select file#,name from v$datafile;

recover datafile 3;

alter database open;

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示例

SYS@ora11g>startup

ORACLE instance started.

Total System Global Area  830930944 bytes

Fixed Size                  2231048 bytes

Variable Size             616563960 bytes

Database Buffers          205520896 bytes

Redo Buffers                6615040 bytes

Database mounted.

ORA-01157: cannot identify/lock data file 3 - see DBWR trace file

ORA-01110: data file 3: '+DATA/ora11g/datafile/undotbs1.258.833721555'

cp +DATA/ora11g/datafile/undotbs1.dbf

SYS@ora11g>alter database rename file '+DATA/ora11g/datafile/undotbs1.258.833721555' to '+DATA/ora11g/datafile/undotbs1.dbf';

Database altered.

SYS@ora11g>select file#,name from v$datafile;

FILE# NAME

---------- ---------------------

1 +DATA/ora11g/datafile

/system.256.833721555

2 +DATA/ora11g/datafile

/sysaux.257.833721555

3 +DATA/ora11g/datafile

/undotbs1.dbf

4 +DATA/ora11g/datafile

/users.259.833721555

5 +DATA/ora11g/datafile

/example.269.83372171

1

SYS@ora11g>recover datafile 3;

Media recovery complete.

SYS@ora11g>alter database open;

Database altered.