今天有個dataguard庫，啓動備庫的時候報錯：
ERROR at line 1:
ORA-10458: standby database requires recovery
ORA-01196: file 1 is inconsistent due to a failed media recovery session
ORA-01110: data file 1: '/oradata/prov/system01.dbf'
原因:日誌的scn跟控制文件不一致導致
1、主庫可以正常起來，並正常啓動主庫的監聽，確保主庫監聽正常。
2、備庫啓動到mount階段，並啓動備庫的監聽，確保備庫的監聽也正常。
3、備庫啓動日誌應用：
SQL> alter database recover managed standby database disconnect from session;
Database altered.
4、檢查主庫日誌序號:
select name,SEQUENCE#,APPLIED from v$archived_log order by sequence#;
檢查備庫alert日誌：
日誌的最後一個序號跟主庫檢查的一致即可。
5、備庫停止應用日誌
SQL> alter database recover managed standby database cancel
2 ;
Database altered.
6、備庫啓動到open並再次應用日誌
SQL> alter database open
2 ;
Database altered.
SQL> alter database recover managed standby database using current logfile disconnect from session;
Database altered.
Mos上的參考文檔
Open Standby Database Fails due to ORA-1110/ORA-1196/ORA-10458 (文檔 ID 2047793.1)
Problem happens with following conditions.
Physical Standby Database
Standby Database is terminated
Standby Controlfile is re-created or restored from backup
Try to Open Standby Database as READ ONLY mode
CAUSE
This is an expected limitation.
When Standby Database is terminated and standby controlfile must be restored, crash recovery is required
to open Standby Database as READ ONLY.
But datafiles remains as FUZZY, and it is not recoverable.
Solution
Restore backup of all datafiles and control files when standby controlfile must be restored and the
Standby Database crashed before