One more bug affects the newly released Windows 11 2022 Update, version 22H2. When copying large files from a network share, the operation can perform really slow. A large (multi-gigabyte) file can have up to 40% less throughput compared to SMB when copying (reading).
Principal Program Manager in the Windows Server engineering group, Ned Pyle, recommends using alternative solutions to copy large files, such as robocopy. The command he provides as a workaround is
robocopy \\someserver\someshare c:\somefolder somefile.ned /J
The /J argument tells the app to not use input-output buffers, that appears to be broken in Windows 11 version 22H2.
Sadly, the issue is not exclusive to network files and SMB. The bug can be reproduced on the local file system as well.
It is worth noting that robocopy is not the only tool that can become a workaround. There are multiple alternative file manager apps that offer they own file manipulation methods. So if you are affected, try to use some until Microsoft will release a fix for this issue.
Finally, the file copy bug is not the only issue you may face in Windows 11 2022 Update. There is also a confirmed issue with printers. For a specific class of devices the OS may removed advanced settings and options once you disconnect or turn off the printer. Microsoft has set an upgrade block for those who have such printers, so their devices won't see the version 22H2 installation prompt.
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