V$ASM_USER displays the effective operating system user names of connected database instances and of file owners.

Column Datatype Description
GROUP_NUMBER NUMBER ASM disk group number
USER_NUMBER NUMBER ASM internal unique user number
COMPOUND_INDEX NUMBER A 32-bit number consisting of a disk group number in the high-order 8 bits and a user number in the low-order 24 bits (for efficient access to the view)
INCARNATION NUMBER Incarnation number of the user
OS_ID VARCHAR2(128) Operating system user ID
OS_NAME VARCHAR2(64) Operating system user name