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by p_ing 424 days ago
NTFS/ReFS are not slow. But there is an extensible file system filter layer above them that can slow things down.
1 comments
ormax3 424 days ago
microsoft introduced Dev drives for this reason, they are optimized such that no file system filters are attached

https://learn.microsoft.com/en-us/windows/dev-drive/

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creatonez 423 days ago
I thought by filters they quite literally mean the antivirus filters in Defender? Does it strip down some of the Windows file semantics too?
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p_ing 423 days ago
File system filters are pluggable kernel drivers. For example, ProcMon (Sysinternals tool) monitors file systems via a file system filter -- so fun fact, if you outright disable file system filters on a ReFS volume, you won't get any ProcMon results! This was a 'duh' moment for me.

https://learn.microsoft.com/en-us/windows-hardware/drivers/i...

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