JAGE420-EXP is an external 4U-20 Bay Hot-Swap SATA/SAS rackmount disk array storage chassis. It provides users a most big storage capacity for up to 20 hard drives for RAID configurations. This 4U-20 Bay external SATA/SAS JBOD is designed with high quality HD miniSAS (SFF8644) connectors. Three 120mm ball bearing fans offer an enhanced thermal cooling solution for keeping the equipment from heat damage. DAGE420U-5HD provides maximum storage and performance to high density storage system.