In this post, you’ll learn more about the Oracle ErrorORA-15025: could not open disk “string” with the details on why you receive this error and the possible solution to fix it.
Oracle Error Description
ORA-15025: could not open disk “string”
Reason for the Error ORA-15025: could not open disk “string”
The specified disk could not be opened. If the database instance is running as an Operating System (OS) user different from that of the ASM instance, then the permissions on the database oracle binary may be incorrect.
How to fix the Error ORA-15025: could not open disk “string” ?
You can fix this error in Oracle by following the below steps
Check the additional error messages, if any. If the database instance is running as an OS user different from that of the ASM instance, use the “srvctl” command to stop and restart the database to fix the permissions.