hello ,i was using truenas for 2 years in a i5 12500H with 32gb ram and 2 nvme 500gb with raidZ1 with a throughput around 800-900MB/s between my windows computer and the server.

due to unraid using ZFS ( THANK GOD¡¡¡ ) i decided to try unraid again to use it as my daily NaS OS. I move a lot of big files ,like movies ,but also VM hdd images which can be 500GB each ,so thats why i need the best performance from the server.

im having trouble, but it all seems network related:

Test 1 from PC to SERVER -->iperf start at 3.60ish Gbps but always ends in 900-800mbps

root@NOSTROMO:~# iperf3 -s

-----------------------------------------------------------

Server listening on 5201 (test #1)

-----------------------------------------------------------

Accepted connection from 192.168.1.2, port 52133

[ 5] local 192.168.1.5 port 5201 connected to 192.168.1.2 port 52134

[ ID] Interval Transfer Bitrate

[ 5] 0.00-1.00 sec 341 MBytes 2.86 Gbits/sec

[ 5] 1.00-2.00 sec 133 MBytes 1.11 Gbits/sec

[ 5] 2.00-3.00 sec 121 MBytes 1.02 Gbits/sec

[ 5] 3.00-4.00 sec 108 MBytes 909 Mbits/sec

[ 5] 4.00-5.00 sec 100 MBytes 839 Mbits/sec

[ 5] 5.00-6.00 sec 102 MBytes 858 Mbits/sec

[ 5] 6.00-7.00 sec 99.4 MBytes 834 Mbits/sec

[ 5] 7.00-8.00 sec 107 MBytes 898 Mbits/sec

[ 5] 8.00-9.00 sec 115 MBytes 965 Mbits/sec

[ 5] 9.00-10.00 sec 113 MBytes 947 Mbits/sec

[ 5] 10.00-10.00 sec 256 KBytes 873 Mbits/sec

- - - - - - - - - - - - - - - - - - - - - - - - -

[ ID] Interval Transfer Bitrate

[ 5] 0.00-10.00 sec 1.31 GBytes 1.12 Gbits/sec receiver

Test 2 from SERVER to PC--> the speed is pretty good ,not perfect but i would be ok with it

C:\Users\******\Desktop>iperf3.exe -s

-----------------------------------------------------------

Server listening on 5201

-----------------------------------------------------------

Accepted connection from 192.168.1.5, port 50840

[ 5] local 192.168.1.2 port 5201 connected to 192.168.1.5 port 50856

[ ID] Interval Transfer Bandwidth

[ 5] 0.00-1.00 sec 816 MBytes 6.85 Gbits/sec

[ 5] 1.00-2.00 sec 796 MBytes 6.68 Gbits/sec

[ 5] 2.00-3.00 sec 753 MBytes 6.32 Gbits/sec

[ 5] 3.00-4.00 sec 721 MBytes 6.05 Gbits/sec

[ 5] 4.00-5.00 sec 746 MBytes 6.26 Gbits/sec

[ 5] 5.00-6.00 sec 734 MBytes 6.16 Gbits/sec

[ 5] 6.00-7.00 sec 756 MBytes 6.35 Gbits/sec

[ 5] 7.00-8.00 sec 752 MBytes 6.31 Gbits/sec

[ 5] 8.00-9.00 sec 768 MBytes 6.44 Gbits/sec

[ 5] 9.00-10.00 sec 739 MBytes 6.20 Gbits/sec

[ 5] 10.00-10.04 sec 28.1 MBytes 6.16 Gbits/sec

- - - - - - - - - - - - - - - - - - - - - - - - -

[ ID] Interval Transfer Bandwidth

[ 5] 0.00-10.04 sec 0.00 Bytes 0.00 bits/sec sender

[ 5] 0.00-10.04 sec 7.43 GBytes 6.36 Gbits/sec receiver

now here comes the funny part ... i have an external terramaster D6 320 enclosure using usb C that tops at around 800-900 MBps ,so i did a test to check if the bottleneck is ZFS in unraid:

both array can get up to 1 GBps ,but obviously not sustained

thew speed fluctuates ,which is totally normal , but my question is

What in the @|#~#€¬#¬~€¬@ is slowing down the network speed between PC <---> SERVER ???

both cards are intel x520-1 ,the switch is Tp-link Tl-st1008f and from my pc to switch i use optical fiber LC multimode cable 20 mts+sfp , and from switch to server a DAC cable rated 10G.

Mind you with truenas the transfer rate from windows to server was 900ish MBps static ,no dips ,no slowdowns, from the SERVER to PC was the same give or take.

what could be causing what to me it seems a bottleneck in the network between those machines?

(i also tried jumbo frames 9014 and no luck)

nostromo-diagnostics-20250713-2111.zip

Edited July 13, 2025Jul 13 by ARMITAGEIII
grammar

no one can help me ??

Iperf only tests the LAN, so when the results are not normal, it can typically only be NIC (or NIC driver/settings), cables, switch or client PC.

2 hours ago, JorgeB said:

Iperf only tests the LAN, so when the results are not normal, it can typically only be NIC (or NIC driver/settings), cables, switch or client PC.

But then why if i swap the power Mode the speed is almost stable??? If i swap to the first power Mode, the nic works at 4.5GBps avg , is there a command to disable apm? (or disable It at Network level?)

As stated ,with truenas this problem didnt exist,so hardware works flawless like has been the last years. In fact i booted truenas just to test and the speed is almost saturating the 10gb in both ways.

There must be a way to make unraid works now that It supports zfs :(

Could be related to the NIC or its driver.

Its there a way to fix or swap a Linux driver? Like Fetch the Intel ones to see It if makes any difference? Besines that the machine works flawless in unraid with zfs , array speed its the same as truenas :)

Not that I know of.

well thank you for trying ,its a shame having 2 licenses storing dust :( ,is there any legal way to sell the to someone that can use unraid?

4 hours ago, ARMITAGEIII said:

well thank you for trying ,its a shame having 2 licenses storing dust :( ,is there any legal way to sell the to someone that can use unraid?

FOUND IT thank you intel and microsoft... just 1 driver adjustment interrupt moderation i think is the english name ,turned it to OFF and it works flawless :) . Hope it will help someone in the future :)

windows 10 client:

-----------------------------------------------------------

Server listening on 5201

-----------------------------------------------------------

Accepted connection from 192.168.1.5, port 33442

[ 5] local 192.168.1.2 port 5201 connected to 192.168.1.5 port 33448

[ ID] Interval Transfer Bandwidth

[ 5] 0.00-1.00 sec 1.05 GBytes 9.05 Gbits/sec

[ 5] 1.00-2.00 sec 1.10 GBytes 9.41 Gbits/sec

[ 5] 2.00-3.00 sec 1.10 GBytes 9.41 Gbits/sec

[ 5] 3.00-4.00 sec 1.09 GBytes 9.40 Gbits/sec

[ 5] 4.00-5.00 sec 1.09 GBytes 9.37 Gbits/sec

[ 5] 5.00-6.00 sec 1.09 GBytes 9.40 Gbits/sec

[ 5] 6.00-7.00 sec 1.09 GBytes 9.38 Gbits/sec

[ 5] 7.00-8.00 sec 1.08 GBytes 9.32 Gbits/sec

[ 5] 8.00-9.00 sec 1.09 GBytes 9.36 Gbits/sec

[ 5] 9.00-10.00 sec 1.09 GBytes 9.39 Gbits/sec

[ 5] 10.00-10.04 sec 42.7 MBytes 9.33 Gbits/sec

- - - - - - - - - - - - - - - - - - - - - - - - -

[ ID] Interval Transfer Bandwidth

[ 5] 0.00-10.04 sec 0.00 Bytes 0.00 bits/sec sender

[ 5] 0.00-10.04 sec 10.9 GBytes 9.35 Gbits/sec receiver

(server running ubuntu live usb) iperf3 -c 192.168.1.2

Connecting to host 192.168.1.2, port 5201

[ 5] local 192.168.1.5 port 52304 connected to 192.168.1.2 port 5201

[ ID] Interval Transfer Bitrate Retr Cwnd

[ 5] 0.00-1.00 sec 1.09 GBytes 9.40 Gbits/sec 0 462 KBytes

[ 5] 1.00-2.00 sec 1.09 GBytes 9.39 Gbits/sec 0 462 KBytes

[ 5] 2.00-3.00 sec 1.09 GBytes 9.39 Gbits/sec 0 462 KBytes

[ 5] 3.00-4.00 sec 1.10 GBytes 9.41 Gbits/sec 0 462 KBytes

[ 5] 4.00-5.00 sec 1.09 GBytes 9.39 Gbits/sec 0 462 KBytes

[ 5] 5.00-6.00 sec 1.09 GBytes 9.41 Gbits/sec 0 462 KBytes

[ 5] 6.00-7.00 sec 1.09 GBytes 9.40 Gbits/sec 0 462 KBytes

[ 5] 7.00-8.00 sec 1.10 GBytes 9.41 Gbits/sec 0 462 KBytes

[ 5] 8.00-9.00 sec 1.09 GBytes 9.40 Gbits/sec 0 462 KBytes

[ 5] 9.00-10.00 sec 1.10 GBytes 9.41 Gbits/sec 0 462 KBytes

- - - - - - - - - - - - - - - - - - - - - - - - -

[ ID] Interval Transfer Bitrate Retr

[ 5] 0.00-10.00 sec 10.9 GBytes 9.40 Gbits/sec 0 sender

[ 5] 0.00-10.00 sec 10.9 GBytes 9.40 Gbits/sec receiver

final test with unraid clean installation:

root@Nostromo:~# iperf3 -c 192.168.1.2

Connecting to host 192.168.1.2, port 5201

[ 5] local 192.168.1.5 port 36746 connected to 192.168.1.2 port 5201

[ ID] Interval Transfer Bitrate Retr Cwnd

[ 5] 0.00-1.00 sec 1.10 GBytes 9.44 Gbits/sec 0 405 KBytes

[ 5] 1.00-2.00 sec 1.10 GBytes 9.42 Gbits/sec 0 356 KBytes

[ 5] 2.00-3.00 sec 1.10 GBytes 9.43 Gbits/sec 0 371 KBytes

[ 5] 3.00-4.00 sec 1.09 GBytes 9.36 Gbits/sec 0 388 KBytes

[ 5] 4.00-5.00 sec 1.10 GBytes 9.44 Gbits/sec 0 368 KBytes

[ 5] 5.00-6.00 sec 1.10 GBytes 9.41 Gbits/sec 0 405 KBytes

[ 5] 6.00-7.00 sec 1.10 GBytes 9.42 Gbits/sec 0 396 KBytes

[ 5] 7.00-8.00 sec 1.10 GBytes 9.44 Gbits/sec 0 399 KBytes

[ 5] 8.00-9.00 sec 1.10 GBytes 9.43 Gbits/sec 0 416 KBytes

[ 5] 9.00-10.00 sec 1.10 GBytes 9.43 Gbits/sec 0 376 KBytes

- - - - - - - - - - - - - - - - - - - - - - - - -

[ ID] Interval Transfer Bitrate Retr

[ 5] 0.00-10.00 sec 11.0 GBytes 9.42 Gbits/sec 0 sender

[ 5] 0.00-10.00 sec 11.0 GBytes 9.42 Gbits/sec receiver

iperf Done.

-----------------------------------------------------------

Server listening on 5201

-----------------------------------------------------------

Accepted connection from 192.168.1.5, port 36736

[ 5] local 192.168.1.2 port 5201 connected to 192.168.1.5 port 36746

[ ID] Interval Transfer Bandwidth

[ 5] 0.00-1.00 sec 1.06 GBytes 9.07 Gbits/sec

[ 5] 1.00-2.00 sec 1.10 GBytes 9.41 Gbits/sec

[ 5] 2.00-3.00 sec 1.10 GBytes 9.43 Gbits/sec

[ 5] 3.00-4.00 sec 1.09 GBytes 9.37 Gbits/sec

[ 5] 4.00-5.00 sec 1.10 GBytes 9.43 Gbits/sec

[ 5] 5.00-6.00 sec 1.10 GBytes 9.43 Gbits/sec

[ 5] 6.00-7.00 sec 1.10 GBytes 9.41 Gbits/sec

[ 5] 7.00-8.00 sec 1.10 GBytes 9.43 Gbits/sec

[ 5] 8.00-9.00 sec 1.10 GBytes 9.44 Gbits/sec

[ 5] 9.00-10.00 sec 1.10 GBytes 9.44 Gbits/sec

[ 5] 10.00-10.04 sec 43.6 MBytes 9.36 Gbits/sec

- - - - - - - - - - - - - - - - - - - - - - - - -

[ ID] Interval Transfer Bandwidth

[ 5] 0.00-10.04 sec 0.00 Bytes 0.00 bits/sec sender

[ 5] 0.00-10.04 sec 11.0 GBytes 9.39 Gbits/sec receiver