FIX UPDATE: Slower SMB Read Performance for large files in Windows 11 22H2


  • Staff
Heya folks, Ned here again. There is a performance reduction in 22H2 when copying larger files from a remote computer down to a Windows 11 computer or when copying from any Windows computer to a remote Windows 11 computer.

Fix update 12/14/2022: An updated version of this preview fix is now available in Windows 11 Insider Preview Build 25267. This version "Fixed an issue where restartable copies of a file (for example using robocopy) with alternate data streams were hanging frequently in the latest Dev Channel builds." The final fix for Windows 11 22H2 production computer will come in a normal monthly Cumulative Update through Windows Update once validated in Insider builds.

Fix update 11/28/2022: The preview fix for this issue is now available in Windows 11 Insider Preview Build 25252. The final fix for Windows 11 22H2 production computer will come in a normal monthly Cumulative Update through Windows Update once validated in Insider builds.

For the latest information about this issue, please see the known issues section of KB5017389

If you are using Microsoft 365 admin center and have Windows Release Health available there, you can view this issue in the Windows 11, version 22H2 section. The ID on Microsoft 365 is WI442499.

Source:
 

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Last edited:
Fix update 12/14/2022
 

My Computers

System One System Two

  • OS
    Windows 11 Pro for Workstations
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom self build
    CPU
    Intel i7-8700K 5 GHz
    Motherboard
    ASUS ROG Maximus XI Formula Z390
    Memory
    64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz (F4-3600C18D-32GTZR)
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING (11GB GDDR5X)
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G75 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 990 PRO M.2,
    4TB Samsung 990 PRO M.2,
    8TB WD MyCloudEX2Ultra NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3 wall mounted
    Cooling
    Corsair Hydro H115i
    Keyboard
    Logitech wireless K800
    Mouse
    Logitech MX Master 3
    Internet Speed
    1 Gbps Download and 35 Mbps Upload
    Browser
    Google Chrome
    Antivirus
    Microsoft Defender and Malwarebytes Premium
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Galaxy S23 Plus phone
  • Operating System
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    HP Spectre x360 2in1 14-eu0098nr (2024)
    CPU
    Intel Core Ultra 7 155H 4.8 GHz
    Memory
    16 GB LPDDR5x-7467 MHz
    Graphics card(s)
    Integrated Intel Arc
    Sound Card
    Poly Studio
    Monitor(s) Displays
    14" 2.8K OLED multitouch
    Screen Resolution
    2880 x 1800
    Hard Drives
    2 TB PCIe NVMe M.2 SSD
    Internet Speed
    Intel Wi-Fi 7 BE200 (2x2) and Bluetooth 5.4
    Browser
    Chrome and Edge
    Antivirus
    Windows Defender and Malwarebytes Premium
MS has not fixed this as of 1-2-2024. Tested on Multiple Win 11 Computers. Is the speed limited to 200-450 even with higher speed networks? 25, 40 or 100Gbe networks and win 11? Or does the slowdown scale?
 

My Computer

System One

  • OS
    Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    Self made
    CPU
    i9-14900k
    Motherboard
    MSI PRO Z790-A MAX WIFI
    Memory
    G.SKILL 64G 2X D5 6400 C32 TRGB B
    Graphics Card(s)
    EVGA 3080 Ultra
    Sound Card
    N/A
    Monitor(s) Displays
    38/34 Alienware
    Screen Resolution
    3840x1600
    Hard Drives
    Samsung M.2 2tb/4tb 990 Pro
    PSU
    1200 waqtt
    Case
    LIANLI O11D EVO GRAY TG ATX

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