How to fix the Oracle error ORA-15020: discovered duplicate ASM disk “string”?

In this post, you’ll learn more about the Oracle ErrorORA-15020: discovered duplicate ASM disk “string” with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-15020: discovered duplicate ASM disk “string”

Reason for the Error ORA-15020: discovered duplicate ASM disk “string”

The discovery encountered two disks claiming to be the same named ASM disk.

How to fix the Error ORA-15020: discovered duplicate ASM disk “string” ?

You can fix this error in Oracle by following the below steps

Check that the ASM_DISKSTRING parameter specifies only a single path for each disk.