# Example: Total disk capacity

Physical drives in an array can be of different capacities (1 GB, or 2 GB, for example). The sum of the physical drives' capacity grouped in an array is the total disk capacity.

For example, if you group two 2 GB drives and one 3 GB drive into an array, the total disk capacity is the 7 GB physically available.

2 GB | 2 GB | 3 GB

Similarly, if you group three 2 GB drives and 1 GB drive into an array, the total disk capacity is the 7 GB physically available.

## More information

- Example: Usable and unusable capacity

Glossary | Contents

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