slow and jittery uploads on omv4 - odroid-xu4

  • greetings


    i am using omv4 latest official build for odroid-xu4
    im facing jittery uploads on FTP and constant 25MB/s uploads on SMB
    downloads are perfect 110MB/s
    tried iperf and its fine
    hdd benchmark is all fine too


    on omv3 never faced such issue


    i'm attaching GIF files for FTP and SMB
    here's the log

  • This is your storage. Slow as hell if that's also sda.

    same test from my ubuntu VM



    Code
    bonga@ubuntu:/media/bonga/nas$ sudo dd if=/dev/zero of=tempfile bs=1M count=1024 conv=fdatasync,notrunc
    1024+0 records in
    1024+0 records out
    1073741824 bytes (1.1 GB, 1.0 GiB) copied, 9.77713 s, 110 MB/s
  • Sorry, no idea what you're doing. To be able to help please provide output from 'sudo armbianmonitor -u', then check the mountpoint of your sda partition, do a 'cd /path/to/sda1' and provide output from

    Code
    iozone -e -I -a -s 1000M -r 128k -r 16384k -i 0 -i 1

    here's the armbianmonitor -u log LINK
    and here's the iozone out
    strange it shows 19-23 MBs
    benchmark the same HDD with NTFS it shows above 110 MB/s on Windows


  • Here's the armbianmonitor -u

    Code
    /dev/sda1 /sharedfolders/downloads btrfs rw,relatime,space_cache,subvolid=5,subvol=/root/downloads 0 0
    /dev/sda1 /sharedfolders/nas btrfs rw,relatime,space_cache,subvolid=5,subvol=/root/nas 0 0
    /dev/sda1 /sharedfolders/root btrfs rw,relatime,space_cache,subvolid=5,subvol=/root 0 0
    /dev/sda1 /srv/dev-disk-by-label-nas btrfs rw,relatime,space_cache,subvolid=5,subvol=/ 0 0


    The disk is mounted several times? Oh, is this a bus-powered Seagate USB3 disk?

    Code
    [    8.757964] scsi 0:0:0:0: Direct-Access     Seagate  Expansion        9300 PQ: 0 ANSI: 6

    If yes, I'm out (consider these things unreliable crap)


    benchmark the same HDD with NTFS it shows above 110 MB/s on Windows

    So you constantly reformat the disk and switch between Windows and Linux?


    Anyway, the numbers are as they are. I doubt that you run Windows on your ODROID-XU4 (so you're comparing different hardware setups) and for me personally it's not worth the time to diagnose problems with USB3 Seagate disks (or bus-powered disks connected to XU4 in general, I consider this board a problematic NAS choice unlike ODROID HC1 and HC2)


    Somewhere in this thread Building OMV automatically for a bunch of different ARM dev boards you'll find me testing with XU4 and a underpowered 2.5" disk that shows low performance. Too lazy to search for on my own...


    Edit: usually it's about undervoltage and I should really stop trying to help with crappy hardware setups since it's just a waste of time...

  • it used to be NTFS before

    Then I would suggest testing with another Linux host or reformatting with NTFS again and testing with Windows (and not with 2 USB hubs in between, the XU4 has already one internal hub). Anyway: poor storage write performance is the reason for poor NAS write performance and 'jitter'. A long SMART selftest is also a good idea.


    As a reference: Building OMV automatically for a bunch of different ARM dev boards (performance sucks when drive is undervolted)

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