You can access two USB ports from the front of the server and two USB ports from the rear of the server. The USB ports support hot-plugging. You can connect and disconnect USB cables and peripheral devices while the server is running, without affecting server operations.
Note - The maximum USB cable length for connecting to the server's full-speed USB ports is 5 meters.
Note - You can connect up to 126 devices to each of the four USB controllers (two ports in front, two ports in rear), for a total of 504 USB devices per server.