JAGE412HD is an external 4U-12 bay hot-swappable SAS/SATA rackmount disk array storage chassis. It provides users a most big storage capacity for up to 12 hard drives for RAID configurations. This 4U-12 Bay external SATA JBOD is designed with 3 high quality HD miniSAS (SFF8644) connectors. One 120mm Ball bearing fan offer long lasting and enhanced thermal cooling solution. DAGE412U-3HD provides maximum storage and performance to high density storage system.