A large difference in the amount of free disk space is shown in the Archive Log section in Spotlight, compared to what is being reported in Oracle Enterprise Manager (OEM). Spotlight shows less free disk space than OEM reports.
For example, Spotlight shows 180 GB free disk space, while OEM shows 650 GB of free space.
How is the difference in free disk space reported between Spotlight and OEM?
Spotlight shows the free usable space, whereas OEM shows the entire free space.
This is the reason for the difference between these figures in Spotlight and OEM.