Windows 10 Incorrect IO prioritization in Windows 7, 10, 11

[高大奇特的巨杉]

When I look at Windows IO priorities, I see that "High" does not execute before "Normal" and "Low" does not execute before "Very Low", i.e. "High" equals "Normal" and "Low" equals "Very Low". Why?For example, when I test with FastCopy and set the IO priority of one to "High" and the other to "Normal". The "High" does not execute before the "Normal", they alternate, as in the case of the same priority.If one priority is "High" and the other "Low", " High " takes precedence over "Low" (and also over "Very Low"); similarly, "Normal" takes precedence over "Low" and "Very Low". In addition, we can

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