Slow lan speed transfer rate

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Hi everyone, i've received my new Helios4, i installed OpenMediaVault and i've a 6TB WDRed inside Helios4.  Trying to copy files on the NAS i found a very slow speed transfer rate (about 4.5MB/s) i tried to test the LAN over the Elios4 with iperf  an this are the results... any idea to solve the problem ? Cables are new cat 5e.



Last login: Wed Jan  9 22:58:09 2019 from

root@helios4:~# iperf -s
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
[  4] local port 5001 connected with port 36416
[ ID] Interval       Transfer     Bandwidth
[  4]  0.0-10.6 sec  51.2 MBytes  40.7 Mbits/sec

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@Mirco As discussed with you on FB, the mii-tool command you did confirmed that the Helios4 is connected at 1Gbps full duplex with your router/switch.

$> sudo mii-tool eth0
eth0: negotiated 1000baseT-FD flow-control, link ok

You did your iperf measure from a laptop connected by wifi to your router, so the perf you get is due to the low throughput with your wifi connection. Do your perf test with a computer or laptop that has a gigabit LAN interface.

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