UD doesn't have a numeric limit to the number of drives, but there is a practical limit you've surely exceeded. UD is polling disk drives for status like size, used, and free every three seconds to refresh the display. UD will not be able to keep up with 110 drives and maintain a responsive GUI as you've seen.
Why do you have 110 unassigned drives? If you have that much storage requirement, you need to build a personal data center.