SMB/CIFS File Transfer Appears Slow

    SMB file transfer rate appears slow on 1 gig network (local). 1.5 gig video file transfers at 112 MB/s. Is this normal? If so, do I have to upgrade to 2.5 gig network to get faster transfer speeds?


    Setup:

    Workstation connected to same 1 Gig switch as OMV NAS with files

    The attached pic shows that the network card is connected at 1 gig


    OMV 6 NAS Server connected to same 1 gig switch as Workstation

    The attach pic shows that the network card is connected at 1 gig


    the transfer rate -- 112 MB/s. Its the same transfer rate for all large files on the server.


    I isolated the two machines to and another switch and tested again with the same results: tp-link TL-Sg108 /w 8 ports

    Your network is 1 Gb (Gigabit). Anywhere between 90MBps to 115MBps (MegaBytes) is normal for a gigabit network. Theoretical maximum is 125MBps without taking into account any hardware handshaking or other hardware related bottlenecks, flow control, or protocol overhead.


    You are likely not differentiating between the upper case B and the lower case b for the bits to Bytes conversion.


    There is a factor of 8 to convert bits to Bytes, and a factor of 1000 to convert Mega to Giga.


    1Gbps x 1000 = 1000Mbps

    1000Mbps / 8 = 125MBps


    Subtracting your protocol can easily reduce the data rate by 5% to 10%, and other hardware bottlenecks can reduce it further.


    A faster connection (ie, 2.5Gbps hardware) can likely get better speeds if your systems can keep up, but don't expect to see a full 2.5 times the speed. You would more likely get somewhere between 1.5 to 2 times the speed.

    Asrock B450M, AMD 5600G, 64GB RAM, 6 x 4TB RAID 5 array, 2 x 10TB RAID 1 array, 100GB SSD for OS, 1TB SSD for docker and VMs, 1TB external SSD for fsarchiver OS and docker data daily backups

    Like 1

    I would like to add my experience from this morning, and hope someone can assist in debugging this problem.


    I am using Windows File Explorer on Win11 Pro to copy a large 'backup' folder from D:\Users\.... (located on a data partition separate from but on the same 1TB SSD) to Q:\.... which is a Network drive share from the OMV using SMB/CIFS. The Win11 Pro Mini-PC has 32GB RAM, running AMD Ryzen 5 7430U with 6 Core(s), 12 Logical Processors.


    The OMV system is booted from an older 80GB Intel SSD and has a new WD Red 1TB SSD as a data drive where the shares are located. It is an older Intel945 board with only 1GB RAM, but that doesn't seem to be a major problem.


    Please refer to attached PNGs which illustrate the problem. Initial performance, although not perfect ( IIRC around 50MB/s ) wasn't too bad, but then things got ugly.


    Please give me instructions for anything else you need to see to help debug this issue.


    Cheers.

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