XE1-3ET00-11 RSC-3ET, 3U 16x 3.5" hot-swap bays, tool-less 3.5" and 2.5" HDD tray, 800W CRPS redundant power supply, 4x 2.5" internal SSD top plate, 2x 2.5" hot-swap OS, rail, 3U16 SAS 12G