I’m using a small collection of HP’s msa60 drive shelves and a hp sa-822 array controller.
they are plug in and play. My first chia array is 12 raid 5 14 tb drives, My next drive expansion will be 6x20 tb drives followed by another 6x20 tb- replacing my 2x 6x2tb media library arrays. this design will provide approx. 300 tb of plot space. Once that is done I may upgrade 2 more msa60 drive shelves, basically surplussing 24 1 tb drives.