LaCie 8big Dual Thunderbolt-2 1U Rackmount 8-Bay RAID Array 48TB 9000476U Capacity: 48TB Internal Storage Media: 8 or 4 hot-swappable 7200RPM/64MB cache (or greater) hard disks Interface Transfer Rate: 20Gb/s RAID Modes: Preconfigured HFS+ RAID 5