The IOzone is widely used File System Bench-marking tool in both linux and windows systems. The Flexible Filesystem Benchmark (FFSB) is a new cross-platform file-system performance measurement tool. It uses custom profiles as input to measure multiple file systems read/write performances. This paper identifies and compares these file system benchmarking tools in terms of the optimal usage techniques such as buffer size, number of threads, number of write blocks etc. Internals and features of these tools , and the necessary steps involved in the porting of benchmarking tools to different platforms are also discussed. The depicted file system benchmarking performance numbers, in this paper, are measured in both x86 PCs and ARM based SOC platforms.The audience for this presentation are the System Architects and Software Developers working on file systems,storage device drivers and Bench-marking tools.