Oracle Solution for Error ora-15282

ORA-15282: ASM disk "string" is not visible cluster-wide

What triggered the Error:

An ALTER DISKGROUP ONLINE command specified a disk that could not be discovered by one or more nodes in a RAC cluster configuration.

What should we do to fix it:

Check operating system permissions for the device and the storage sub-system configuration on each node in the RAC cluster that cannot identify the disk.