Iometer is an I/O subsystem measurement and characterization tool for single and clustered systems. It was originally developed by the Intel Corporation and in 2001 it was given to the Open Source Development Lab (OSDL). Since the moment of birth it gained in popularity and basically every IT guy has used it at least once.
IOmeter is a very powerfull tool, but if it’s inproperly used it will give you some distorted results. Therefore it’s advised to follow these guidelines: