Very low transfer speed on 1Gb Intel NIC

[jamesgeorge]

Hello everyone, I am very new to the NAS philosophy but I managed to make a system out of the following components.

Motherboard: Asrock H370 Pro4
Processor: Intel(R) Core(TM) i3-8100 CPU @ 3.60GHz
Network Adapter: INTEL(R) Gigabit CT Desktop Adapter
Power Supply: Corsair VS450

My issue is regarding the file transfer speed between the server and the rest of the computers within the network, first of all since I started to build the server I replaced all the switches in the home network with 1Gb and all the wires from and to all the devices with CAT6 and the server is connected directly with a CAT6 cable to a switch. The network adapter indicator light on the server is yellow which indicates that it has a 1Gb connection, but when I try to send files from and to the server I only get maximum of 17-23MiB/s. I will also provide a screenshot of the dashboard while I try to transfer a file to give more information. Could anyone enlighten me on how to increase my transfer speeds?

 

[jgreco]

Try some basic debugging with iperf3 to help you isolate where the problem may be.

 

[jamesgeorge]

Try some basic debugging with iperf3 to help you isolate where the problem may be.

I read about iperf3 but I am not familiar on how to isolate the source of the problem, is there any tutorial or guidance on that?

 

[jgreco]

Yeah. You run it on two machines, pointing one at the other, and see if you get 900Mbits-1000Mbits of connectivity. Then you reverse it. This helps rule out your networking, fake cards, crummy Realteks, bad switches, 100Mbps inadvertent links, etc., as problems.

 

[jamesgeorge]

Yeah. You run it on two machines, pointing one at the other, and see if you get 900Mbits-1000Mbits of connectivity. Then you reverse it. This helps rule out your networking, fake cards, crummy Realteks, bad switches, 100Mbps inadvertent links, etc., as problems.

I see I did a quick test with another program that I have on my Mac and the results where far from the real speeds that I am getting, I will attach the screenshots on two of my drives. I have installed the iperf3 on the terminal app of Mac but I don't know how to install it on the server in order to make it listen so I can do the test. Do you know how to install it?