This site contains Windows binaries for fio. To measure the disk performance we want to bypass the page cache – so we need to set direct to be 1. This also ensures that the I/O scheduler sends every request it receives to the disk without doing any optimization such as request merging
$ fio.bat <IOMeter-Real-Life.txt>
[IOMeter-Real-Life]
directory=c\:\tmp
rw=randrw
rwmixread=70
rwmixwrite=30
size=8g
bs=8k
direct=1
iodepth=64
runtime=300s