How to empty/flush Windows READ disk cache in C#?

Question

If I am trying to determine the read speed of a drive, I can code a routine to write files to a filesystem and then read those files back. Unfortunately, this doesn\'t give

Answer 1

Why DIY?

If you only need to determine drive speed and not really interested in learning how to flush I/O buffers from .NET, you may just use DiskSpd utility from http://research.microsoft.com/barc/Sequential_IO/. It has random/sequential modes with and without buffer flushing.

The page also has some I/O related research reports you might find useful.