Windows 10: Writes to Linux Samba Shares are exceedingly slow

Discus and support Writes to Linux Samba Shares are exceedingly slow in Windows 10 Network and Sharing to solve the problem; I have a Linux server with file shares on my local network. My problem is with writing data to those shares from my Windows 10 Home PC. The problem... Discussion in 'Windows 10 Network and Sharing' started by herbert305, Jan 22, 2016.

  1. Writes to Linux Samba Shares are exceedingly slow


    I have a Linux server with file shares on my local network. My problem is with writing data to those shares from my Windows 10 Home PC. The problem manifests with data writes that are exceedingly slow (not greater than 300 kB/sec) and generally time out before they complete. The problem is aggravated with larger file sizes. I also notice that the Linux server does not show up when browsing the network on the Windows 10 PC, but it does show up when browsing the network from the Windows 7 PCs.

    I have done extensive troubleshooting of the problem and found that this problem is specific to the one Windows 10 PC that I have. All other PCs (running Windows 7) work just fine. I have tested the Windows 7 PCs on the same network port where my Windows 10 PC is located. I even went so far as to purchase a new NIC for the Windows 10 PC, but the behavior has not changed.

    The one odd aspect to the problem is that I can make it go away by changing the Windows 10 PC's work group name to something other than usual value (WORKGROUP), changing the work group name back to WORKGROUP, and rebooting the PC. This action causes the shares to behave correctly (reads and writes are generally done at 10 MB/sec or better) until I reboot the PC again, at which time the aberrant behavior resurfaces.

    Here are some further details concerning the configuration:

    • Windows version is 10.0.10586
    • The LMHOSTS file on the windows PC has an entry for the Linux server.
    • The Linux server is running CentOS 7.2.1511
    • The kernel version is 3.10.0-327.4.4
    • The version of Samba is 4.2.3-11
    • The smb.conf file on the Linux server is as follows:

    Code: [global] workgroup = WORKGROUP server string = Samba Server netbios name = SERVER1 load printers = no disable spoolss = yes log file = /var/log/samba/log.%m max log size = 50 preferred master = yes local master = yes domain master = yes os level = 65 security = user dns proxy = no wins support = yes unix extensions = no map to guest = Bad User getwd cache = yes kernel oplocks = yes socket options = IPTOS_LOWDELAY TCP_NODELAY SO_KEEPALIVE [homes] comment = Home Directories path = /WinHomes/%u read only = No create mask = 0770 directory mask = 0770 inherit permissions = Yes inherit owner = Yes browsable = yes [Family] path = /WinHomes/Family valid users = User1, User2 admin users = User1, User2 write list = User1, User2 force group = Family read only = No acl group control = Yes create mask = 0770 directory mask = 0770 browsable = yes [ER_Share] path = /WinHomes/U_share valid users = User1, User2 valid users = User1, User2 admin users = User1, User2 write list = User1, User2 force group = Users read only = No acl group control = Yes create mask = 0770 directory mask = 0770 browsable = yes[/quote]

    :)
     
    herbert305, Jan 22, 2016
    #1

  2. SMB writes to remote computer freezes or dropps to 5kbs after creator update

    After installing Windows [Version 10.0.15063] my access to NAS (RaspberryPI with USB disks connected) is nearly impossible.

    Coping even few megabytes to the NAS takes a long time (minutes) and often does not finish - no errors on the Samba end , just connection from Windows goes dead. Speed seems to be around 5KB/s.

    Same network and same NAS with my laptop :
    Windows [Version 10.0.14393] and all is working fine - 20+ MB/s - which is what I can expect from this setup and is enough for documents and source code backups.

    Reading from the NAS Samba share is fast.

    Reading from the laptops' share is fast.

    Writing to laptops' share is 5KB/s slow as well. Laptop is sharing folder using the normal Windows SMB. All Microsoft.

    Writing to NAS share , SAMBA , is slow.

    Looks like any writes I do from the Creator Update computer are slow. Very Slow.

    Has anybody got similar problem or solutions to a very slow , unreliable connection to SMB/Samba after the creators update?
     
    PawelWarnenski, Jan 22, 2016
    #2
  3. Pin to Quick Access on a Mapped Network Drive

    It seems to be a problem with the samba protocol, the problem is only on a NAS running linux. A large majority of NAS are using samba protocol for file sharing, that's a big problem...
     
    boustalahit, Jan 22, 2016
    #3
  4. Writes to Linux Samba Shares are exceedingly slow

    Disabling "Large Send Offload (LSO)" as suggested at Slow network throughput on windows 10 seems to have worked for me; at least for now. I've thought this problem was licked before, only to find out after a reboot that it came right back. I'll keep my fingers crossed that this fix stays permanent.
     
    herbert305, Feb 20, 2016
    #4
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Writes to Linux Samba Shares are exceedingly slow

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