oracle中出现ORA-01122错误怎么办

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现象：

在做表空间恢复演练时，遇到如下错误提示：

SQL> alter database datafile 4 online;

alter database datafile 4 online      

*                                     

ERROR at line 1:                      

ORA-01122: database file 4 failed verification check

ORA-01110: data file 4: /ora/app/oracle/oradata/orcl/users01.dbf

ORA-01210: data file header is media corrupt

解决方法：

分析原因：

[oracle@test hotback]$ oerr ora 1122

01122, 00000, "database file %s failed verification check"

// *Cause:  The information in this file is inconsistent with information

//         from the control file. See accompanying message for reason.

// *Action: Make certain that the db files and control files are the correct

//         files for this database.

[oracle@test hotback]$ oerr ora 1110

01110, 00000, "data file %s: %s"

// *Cause:  Reporting file name for details of another error. The reported

//          name can be of the old file if a data file move operation is

//          in progress.

// *Action: See associated error message.

[oracle@test hotback]$ oerr ora 1210

01210, 00000, "data file header is media corrupt"

// *Cause: The file header block is internally inconsistent. The beginning

//         of the block has a header with a checksum and other data for

//         insuring the consistancy of the block. It is possible that

//         the last disk write did not operate correctly. The most likely

//         problem is that this is not a datafile for any database.

// *Action: Have operating system make correct file available to database.

//         If the trace file dump indicates that only the checksum is wrong,

//         restore from a backup and do media recovery.

基本可知，还原的数据文件是不正确的。认真检查后，果然是：

ho cp /ora/app/oracle/backup/hotback/con01.ctl /ora/app/oracle/oradata/orcl/users01.dbf

把备份的控制文件当数据文件给还原回去了！

重新还原：

SQL>  ho cp /ora/app/oracle/backup/hotback/users01.dbf /ora/app/oracle/oradata/orcl/users01.dbf

后续步骤正确执行。

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