Post date: 25-May-2009 10:42:17
In an Automatic Storage Management instance, V$ASM_DISK displays one row for every disk discovered by the Automatic Storage Management instance, including disks which are not part of any disk group. In a database instance, V$ASM_DISK only displays rows for disks in disk groups in use by the database instance.
Check for above column values highlighted in RED. If you have those values returned as a result of some sql, then you are having diskgroup and disks integrity problems.