The Capacity Breakdown Bar

A Drobo storage device divides your entire storage space into four types of storage areas. Use the Capacity Breakdown Bar to view information about how much space is allocated to each area. To view the bar, click on "How is my storage being used?" at the bottom of the main Drobo Dashboard page.

Item	Description
Available For Data	Total available protected storage space. The area where your data is stored.
Reserved For Expansion	Unusable space created when a single hard drive is larger than the rest. This space will become available when you add larger capacity hard drives or upsize a smaller drive with a larger one.
Used For Protection	Space used by the Drobo device for protecting your data.
Overhead	Space used by the Drobo device for managing all the hard drives and how your data is stored.