Measuring IOPs and comparing with IOmeter

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http://serverfault.com – So I've got to somehow generate IOPs using some prehistoric metrics used in IOmeter (which can't run in a 64bit ubuntu environment) The settings used in IOmeter are: 16K block size, 75% read to 25% write ratio, with 80% random distribution. How would I replicate that using something like fio or $other_tool? (HowTos)