When more is better, consider the Comark J-Series 4U Rackmount Server. This industrial grade computer includes what you like about our 2U but adds 2 additional optional drives and bays. It also comes with a hot swappable option and a RAID option. Connect to a plethora of other devices with 2 serial ports, 9 USB ports, 2 Gigabit Ethernet LAN ports, 10 SATA 3.0 Ports (hardware RAID supported) as well as audio and video ports. It even has 6 PCIe expansion slots and an optional DVD-RW drive. If this still isn’t enough, reach out to discuss customization to meet your specific needs.