ORA-00205: error in identifying control file, check alert log for more info
翻譯爲：控制文件的錯誤，請檢查警報日誌中獲得更多信息
通過：/opt/oracle/diag/rdbms/ora11g/ora11g/alert/log.xml文件中找出實例啓動日誌
裏面會有如下信息：
<msg time='2011-11-10T09:55:51.643+08:00' org_id='oracle' comp_id='rdbms'
client_id='' type='UNKNOWN' level='16'
module='MMON_SLAVE' pid='13970'>
<txt>Errors in file /opt/oracle/diag/rdbms/ora11g/ora11g/trace/ora11g_m000_13970.trc:
ORA-00210: cannot open the specified control file
ORA-00202: control file: '/opt/oracle/oradata/ora11g/control03.ctl'
ORA-27048: skgfifi: file header information is invalid
ORA-00210: cannot open the specified control file
ORA-00202: control file: '/opt/oracle/oradata/ora11g/control02.ctl'
ORA-27048: skgfifi: file header information is invalid
</txt>
</msg>
裏面有提示control02.ctl與control03.ctl兩個控制文件錯誤
再找到/opt/oracle/diag/rdbms/ora11g/ora11g/trace/ora11g_m000_13970.trc跟蹤文件
裏面有如下信息：
kcidr_process_controlfile_error:
IO Check was called but no error was found
ORA-00210: cannot open the specified control file
ORA-00202: control file: '/opt/oracle/oradata/ora11g/control03.ctl'
ORA-27048: skgfifi: file header information is invalid
ORA-00210: cannot open the specified control file
ORA-00202: control file: '/opt/oracle/oradata/ora11g/control02.ctl'
ORA-27048: skgfifi: file header information is invalid
裏面提示無法正常打開兩個控制文件。
針對如上信息，可能是由於數據庫的非正常關閉而導致控制文件被損壞。
可選擇如下兩種修改方式：
1、直接拷貝control01.ctl文件進行覆蓋control02.ctl與control03.ctl文件
2、從其它正常的oracle環境中拷貝控制文件進行覆蓋。
實例裝載之後可通過“show parameter spfile;”查詢出oracle加載的參數文件，我這裏是spfileora11g.ora。
實例正常啓動後，可通過“select * from v$controlfile;”查詢這個視圖，這裏面的控制文件均與spfileora11g.ora中配置的控制文件內容一致。