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:
Slower SMB read performance for large files in 22H2
Info and workaround for an issue seen in 22H2 Win11
techcommunity.microsoft.com
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