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Yet, another slow network transfer post

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Ok, i've been troubleshooting this for the past 2-3 days and Im now at my whitts end. Im summoning your help.



for the past 2-3 years I've been running (2) Truenas servers.  One was a backup and the other is (still is) my main media sever.


What I need to do is transfer all of my content (~50TB) from my main Truenas server over to my new Unraid.

When i did transfers in the past between my 2 Truenas servers, I would get 80-90MB/s (almost hitting my 1 gig max.) My method of transfer between the servers has always been SFTP over ssh via Flashfxp. However, when i try to transfer from my Truenas to my Unraid, I can not achieve more than 21-22MB/s (usually much lower)



Things I have tried:


*allowed my data to pass through my cache drive first.


*activate turbo write


*checked and double check my cables connected to this server (all of CAT5e or 6) - NO CAT5 in system-


*Started out using the onboard Realtek 1gig nic, swapped out to 

  Intel Gigabit CT PCI-E Network Adapter EXPI9301CTBLK, then swapped out to a 

  Broadcom NetXtreme 10/100/1000Mbps BCM5751 NIC Nic

(As you can see, no improvement with the 3  different cards.


*Iperf3 test from the Truenas sever to the Unraid seems to check out "OK"



*ethtool seems to show no issues:


Settings for eth0:
    Supported ports: [ TP ]
    Supported link modes:   10baseT/Half 10baseT/Full
                            100baseT/Half 100baseT/Full
    Supported pause frame use: No
    Supports auto-negotiation: Yes
    Supported FEC modes: Not reported
    Advertised link modes:  10baseT/Half 10baseT/Full
                            100baseT/Half 100baseT/Full
    Advertised pause frame use: No
    Advertised auto-negotiation: Yes
    Advertised FEC modes: Not reported
    Speed: 1000Mb/s
    Duplex: Full
    Auto-negotiation: on
    Port: Twisted Pair
    PHYAD: 1
    Transceiver: internal
    MDI-X: off (auto)
    Supports Wake-on: pumbg
    Wake-on: g
        Current message level: 0x00000007 (7)
                               drv probe link
    Link detected: yes


Now for desperate times:

* removed ALL hard disc drives from the unraid sytem except for (1) 16 TB drive.  No improvement with this. Transfer rates still bad. There doesnt seem be to a bottle neck.


attached are my diagnostics.


Anything thing else I should try?






Edited by russo
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No compression that I know of.


However, now we are making progress!!!!!!


Here are my SMB transfers.





I actually was averaging about 85-93MB/s on this transfer (below)







So what does this tell us? I mean, we are practically getting 1 gig transfers via SMB in all directions?  Just  a reminder, when I did SFTP transfers from

TRUENAS ---->TRUENAS (BACKUP) I would generally saturate my network connection. I cant do this with TRUENAS to UNRAID.



thanks for helping me.

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Try transferring from TrueNAS to Unraid using rsync over SSH, make sure no compression is used with rsync (-x), for example, from the Unraid side:


rsync -av root@TrueNAS_IP:/mnt/pool/dataset/ /mnt/user/share/


if you get permission errors, which is normal with TrueNAS and rsync add --no-perms to the command.

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  • Solution

Ok, Rsync shows that im hitting the 1gig transfer rate.  Im going to guess that there's a setting somewhere within my FLashFXP client that is causing the slow down.  I didnt experience this slowdown when i transferred between the 2 Truenas servers.

I think i'll use this Rsync for now on since it consistently hits over 100MB/s


Dont judge me by my file names 🤪


again, a big thank you to YOU :)







  • Like 1
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