fio Windows Invalidate

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Hi All,
Commit 22de5d7741f963e57dd5e3bb70d822e992dd2515 seems to have changed how Windows works with the default invalidate parameter.  Previously it was not needed to specify invalidate=0, but now it is needed on Windows.  Without it, fio reports:

fio-2.21
Starting 1 thread
fio: cache invalidation of \\.\PHYSICALDRIVE1 failed: Unknown error
fio: cache invalidation of \\.\PHYSICALDRIVE1 failed: Unknown error

Is the expectation that Windows default invalidate (1) should silently ignore this issue, or must the user specify invalidate=0 on Windows platforms?  Thanks.

Regards,
Jeff

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