Oracle Solution for Error ora-15075

ORA-15075: disk(s) are not visible cluster-wide

What triggered the Error:

An ALTER DISKGROUP ADD DISK 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:

Determine which disks are causing the problem from the GV$ASM_DISK fixed view. Check operating system permissions for the device and the storage sub-system configuration on each node in a RAC cluster that cannot identify the disk.