ORA-00245: control file backup failed; target is likely on a local file system

文档解释

ORA-00245: control file backup failed; target is likely on a local file system

Cause: Failed to create a control file backup because some process signaled an error during backup creation. This is likely caused by the backup target being on a local file system so it could not be accessed by other instances. It can also be caused by other I/O errors to the backup target. Any process of any instance that starts a read/write control file transaction must have access to the backup control file during backup creation.

Action: Check alert files of all instances for further information.

ORA-00245: control file backup failed; target is likely on a local file system 该错误属于Oracle数据库不可恢复启动错误，表示当尝试恢复数据库，Oracle尝试从本地控制文件备份恢复进程失败。

官方解释

这个错误通常发生在尝试从本地控制文件备份恢复数据库时。由于系统无法从控制文件备份恢复，因此恢复进程失败。

常见案例

1. 数据库恢复时，控制文件打开失败，或者说无法从备份恢复控制文件。

2. 数据库恢复时，尝试从本地控制文件备份恢复进程失败。

正常处理方法及步骤

1. 检查控制文件备份，确保至少有一个有效备份。

2. 确认控制文件备份位置，确保它处于可写状态。

3. 从控制文件备份中恢复控制文件：

备份控制文件：

RMAN > BACKUP CURRENT CONTROLFILE FORMAT 'control_%f_%s_%p’

恢复控制文件：

RMAN > RESTORE CONTROLFILE FROM ‘ /u01/backup/control_%.f_%.s_%.p’

4. 重建控制文件使之与系统指定的数据文件同步。

RMAN > RECOVER DATABASE;

5. 打开库：

RMAN > ALTER DATABASE OPEN;