Home Database Mysql Tutorial 修改Datafile Header规避ORA-01190

修改Datafile Header规避ORA-01190

Jun 07, 2016 pm 05:41 PM

一触发ORA-01190错误的原因1先抛出一个ora-01190错误,此错误用bbed工具构造SQLstartupORACLEinstancestarted.TotalSystemGlobalArea322961408bytesFixedSize&nb

一 触发ORA-01190错误的原因

 

1 先抛出一个ora-01190错误,此错误用bbed工具构造

SQL> startup

ORACLE instance started.

 

Total System Global Area 322961408 bytes

Fixed Size                  2020480 bytes

Variable Size              96471936 bytes

Database Buffers          218103808 bytes

Redo Buffers                6365184 bytes

Database mounted.

ORA-01190: control file or data file 11 is from before the last RESETLOGS

ORA-01110: data file 11: '/oracle/test/jiujian1.dbf'

 

2 oerr ora 01190 给出这个错误的解释

 

[oracle@oracle ~]$ oerr ora 01190

01190, 00000, "control file or data file %s is from before the last RESETLOGS"

// *Cause: Attempting to use a data file when the log reset information in

//          the file does not match the control file. Either the data file

//          or the control file is a backup that was made before the most

//          recent ALTER DATABASE OPEN RESETLOGS.

// *Action: Restore file from a more recent backup.

 以上英文大体意思是

  调用数据文件时发现数据文件的resetlogs信息和控制文件中resetlogs信息不匹配。

 

3 查询数据文件头部和控制文件中关于resetlogs的信息

控制文件中关于resetlogs的相关信息如下:

SQL> select resetlogs_change#, to_char(resetlogs_time,'mm/dd/yyyy hh24:mi:ss') time from v$database;

RESETLOGS_CHANGE#     TIME

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

   2781464667   01/15/2013 21:51:45

各数据文件头中resetlogs的信息如下:

Fhrls:resetlogs scn值

Fhrlc:resetlogs count值

fhrlc_i:resetlogs count 转换成10进制的值

对于resetlogs count 的描述如下:

reset logs count and scn: The counter with the SCN is called the Reset Log Stamp,

and is a unique identification. The counter is in fact a timestamp

 

 

SQL> select hxfil,fhrls change#,fhrlc_i,fhrlc time from x$kcvfh;

 

   HXFIL  CHANGE#             FHRLC_I      TIME

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

    1      2781464667        804808305  01/15/2013 21:51:45

    2      2781464667        804808305  01/15/2013 21:51:45

    3      2781464667        804808305  01/15/2013 21:51:45

    4      2781464667        804808305  01/15/2013 21:51:45

    5      2781464667        804808305  01/15/2013 21:51:45

    6      2781464667        804808305  01/15/2013 21:51:45

    7      2781464667        804808305  01/15/2013 21:51:45

    8      2781464667        804808305  01/15/2013 21:51:45

    11     2781455194        804803925  01/15/2013 20:38:45

    12     2781464667        804808305  01/15/2013 21:51:45

    13     2781464667        804808305  01/15/2013 21:51:45

 

11 rows selected.

通过对比11号文件的resetlogs scn及resetlogs count值不难发现触发ora-01190的原因:即数据文件头部的 resetlogs scn 、resetlogs count 和控制文件中的resetlogs信息不匹配造成的。所以,如果要规避ora-01190错误,我们可以通过bbed修改数据文件头部resetlogs相关值

 

二 通过bbed修改数据文件头部规避此错误

 

1  resetlogs count 和resetlogs scn 在数据文件头部的位置

 

resetlogs count 位于数据文件头部偏移量112处

resetlogs scn 位于数据文件头部偏移量116处

BBED> p offset 112

kcvfh.kcvfhrlc

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