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ORA-19957: database should have no datafiles in unknown state ORACLE 报错 故障修复 远程处理

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ORA-19957: database should have no datafiles in unknown state ORACLE 报错 故障修复 远程处理

文档解释

ORA-19957: database should have no datafiles in unknown state

Cause: The operation failed because the database had one or more datafiles that were in an unknown state.

Action: Drop the datafiles or recover them and bring them online.

ORA-19957: database should have no datafiles in unknown state是由于数据文件处于未知状态导致的错误。

官方解释

ORA-19957代表数据文件已失去连接并进入未知状态。该错误可能会导致数据库无法启动。

常见案例

此错误可能会由数据库运行时存在多个实例而引起,当实例神不知道某个数据文件的位置(即在另一实例中)时,就可能发生未知状态。此外,当某个数据文件与实例断开连接时,也可能发生未知状态。

一般处理方法及步骤

1.确保数据库只有一个实例。

2.检查数据库中的每个文件,以确保其位于正确的目录下。

3.使用重新创建正确文件命令对未知状态的文件进行恢复。

4.重启实例,以确保文件状态恢复正常。

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ORA-19957: database should have no datafiles in unknown state ORACLE 报错 故障修复 远程处理

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