Supermicro CSE-847 4U 45 (44Working) Bay 3.5" hot-swap Power Board JBOD SAS2
Customized (Fans removed and replaced with quieter Noctua fans) 45 (44) bay JBOD with power board which makes a complete running unit without any need for any server internals, just hook up your SAS2 connector/s and off you go.