db_recovery_file_dest is same as db_create_file_dest

数据库：oracle 11.2.0.4

系统：centos 7.9

环境：rac (2节点)

问题描述：数据库开启的时候出现以下告警，此种情况很容易造成文件的误删，所有很有必要将db_recovery_file_dest与db_create_file_dest设置成不同的目录.

WARNING: db_recovery_file_dest is same as db_create_file_dest

以下为具体目录位置：

db_create_file_dest = "+DATA"

db_recovery_file_dest = "+DATA"

实验目标：将db_recovery_file_dest设置成“+DATA/orcl/db_recovery_file”.

1、新建+DATA/orcl/db_recovery_file目录

ASMCMD> mkdir db_recovery_file

2、修改快速恢复区目录

SQL> alter system set db_recovery_file_dest='+DATA/orcl/db_recovery_file' scope=both sid='*';

alter system set db_recovery_file_dest='+DATA/orcl/db_recovery_file' scope=both sid='*'

*

ERROR at line 1:

ORA-02097: parameter cannot be modified because specified value is invalid

ORA-01261: Parameter db_recovery_file_dest destination string cannot be

translated

注意：如果使用ASM作为Fast Recovery Area时，只能指定到Diskgroup级别.

SQL> alter system set db_recovery_file_dest='+ocr' scope=both sid='*';

System altered.

SQL> show parameter db_recovery

NAME TYPE VALUE

------------------------------------ ----------- ------------------------------

db_recovery_file_dest string +ocr

db_recovery_file_dest_size big integer 5G

重启数据库后，该警告不在发生.