Slow Transfer Speeds on SMB Share

1st Official Post

    Hi guys,


    I just bought an HP ProLiant Microserver Gen8 G1610T.
    The following Hardware is installed:
    - 1x SanDisk X100s, 250GB SSD in the ODD-Slot, connected on Sata-Port 5 (Mainboard) => For the OS
    - 1x 4GB MicroSD-Card => GRUB to redirect to the SSD to boot from it
    - 2x 4TB Seagate NAS HDD in Slots 1 & 2
    - Rest: original equipment


    The following Software/OS is installed:
    - Open Media Vault 3.0.25 (erasmus)
    - OMV-Extras3


    Settings:
    - Raid: Mirror
    - HDDs are formatted in XFS
    - different SMB Shares/shared folders on the HDD


    PROBLEM:
    The transfer rate in both directions (reading + writing) is very slow (up to 6MB/s).


    What I did so far:
    - added SMB additional setting: max protocol = SMB3 ==> This gave speeds up to 7MB/s (wow :D)
    - upgraded to backportkernel 4.5.0 ==> increased speed up to 8MB/s
    - on windows 10 client: set autotuninglevel to disabled ==> didn't change anything
    - connected different clients directly (via switch) or via wifi to the server and tried it (no big differences)


    I have the exact same problems on a DIY Server (old Esprimo P400 with i3) at my workplace, but here the speeds don't go over 11MB/s with the same changes (except that I installed backportkernel 4.6.0 recently) and the connection is over GBit Switch via CAT5e cable everytime.


    Can anyone help me please?


    Thanks in advance :)

    • Official Post

    I would check the network with iperf. This should help do that.

    omv 7.4.7-1 sandworm | 64 bit | 6.8 proxmox kernel

    plugins :: omvextrasorg 7.0 | kvm 7.0.14 | compose 7.2.3 | k8s 7.2.0-1 | cputemp 7.0.2 | mergerfs 7.0.5 | scripts 7.0.8


    omv-extras.org plugins source code and issue tracker - github - changelogs


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    Hi, sorry for the late answer... had some more issues, which I had to fix first (what I did, thanks to your help as well :D)

    Quote from ryecoaaron

    I would check the network with iperf.


    This gives me the following output:

    Code
    [ID]   Interval          Transfer          Bandwidth
[ 4]   0.0-10.0 sec    55.6 MBytes    46.5 Mbits/sec


    Client: Virtualbox with Ubuntu 16.04 on Windows 10 connected via WLAN-AC
    (On Windows, iperf didn't give any output)

    • Official Post

    46.5 Mbits/sec = slow. That tells me it is a network issue and the speeds you are seeing are as fast as you will get with the current network setup.

    omv 7.4.7-1 sandworm | 64 bit | 6.8 proxmox kernel

    plugins :: omvextrasorg 7.0 | kvm 7.0.14 | compose 7.2.3 | k8s 7.2.0-1 | cputemp 7.0.2 | mergerfs 7.0.5 | scripts 7.0.8


    omv-extras.org plugins source code and issue tracker - github - changelogs


    Please try ctrl-shift-R and read this before posting a question.

    Please put your OMV system details in your signature.
    Please don't PM for support... Too many PMs!

    Quote from ryecoaaron

    as fast as you will get with the current network setup


    But how can I improve this?
    The Server is connected with two 1 Gbit ports to two 1Gbit ports of the Router (Fritzbox 7362 SL) with Cat5e cables.
    The Notebook I'm testing it with is connected via Wifi.

    Hello, i have the same configuration with little exceptions, first thing that i need to tell you is that if you test your configuration from a notebook over wifi you will never get max speeds because of the wifi network adapter of you notebook, and the second opinion is that the 2 connection from your server to the 2 network ports of the router if is not well configured it will slow the speed. On a windows 10 machine conected on same switch via gigabit cable i get about 90 Mb/s read and write speed, on the notebook ( a ThinkPad x220 with a Intel centrino advanced-N 6205) i get over wifi some 10 Mb/s, and another notebook with a broadcom adapter i get about 6-8 Mb/s.
    So my advice is to test on wired network with a good gigabit network adapter.

    Hi @cooldjmc,
    It's the same with one or two cables connected to the server...
    You're right, over cable, I get around 90MB/s as well, but I'd love to get at least 10MBs via Wifi as well... any way there to manage this?
    I'm using a Lenovo T450s with Intel Dual Band Wireless-AC 7265 and Windows 10

    @IWillTry


    I had this problem too with wireless connections. If you have an AC Router then try setting the mode from mixed to AC only. I jumped from ~5.4 Mbps to 23 Mbps just by changing the wireless router mode. If your drives are formatted btrfs you can also get an improvement setting vfs objects = btrfs in the smb.conf file

    Edited once, last by Oglark: Change vfs type to vfs objects ().

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