修改Datafile Header规避ORA-01190
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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