Benchmark profile:
- frag test #1: after sysbench sequential write (16x 64 MB files - 2 MB block size)
- frag test #2: after sysbench random write (16x 64 MB files - 4 KB block size)

Fragmentation is #1 enemy for mechanical drives. Let see how the contenders fare in this discipline:

With sequentially-written large files, all filesystem except EXT3 perform very well.

On the other hand, with randomly written files all of our heroes fail to impress.