DAGE412U40DE-ES is an external 4U-12 bay hot-swappable 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 12 eSATA connectors. One 120mm ball bearing fan offers long lasting and enhanced thermal cooling solution. DAGE412U40DE-ES provides maximum storage and performance to high density storage system.