These videos cover how I expanded my FreeNAS system into a second chassis and some of the challenges faced during such an expansion. The basic idea is pretty simple and could be implemented in just about any storage system for a pretty reasonable cost.
Part I video link: https://www.youtube.com/watch?v=_X2YnALqHsI
Part II video link: https://www.youtube.com/watch?v=CDrXAZLJXxU
Part I video link: https://www.youtube.com/watch?v=_X2YnALqHsI
Part II video link: https://www.youtube.com/watch?v=CDrXAZLJXxU