Flexibly and economically expand the storage space of a dual-controller QNAP NAS for petabyte-level storage capacity Dual path mini-SAS design with a redundant power supply for enhanced system reliability QNAP dual-controller NAS can detect JBOD connections, and enter missing mode protection to prevent data corruption DataBoltbandwidth optimization combines two 6Gb/s connections into one 12Gb/s data stream to achieve faster speed with existing 6Gb/s infrastructure Manage the storage space and settings of the connected TL-R1620Sdc with Storage Manager on the host NAS The space-efficient short depth design makes it easy to install in small media cabinets or places with a lot of cabling. (Rail kit RAIL-B02 requires optional purchase.) Featuring dual controllers, an OLED indicator, and a short-depth rackmount design, the 3U 16-bay TL-R1620Sdc SAS 12Gb/s storage expansion enclosure is ideal for expanding the storage capacity of dual-controller QNAP NAS. Both controllers have three Mini-SA