Hi Jens, Question/suggestion (I am almost sure that it was already discussed here, but maybe ...): Why not to divide a raw device size for multithreaded write by number of threads and let every thread to write on a separate chunk (as you do for FS - every thread writes to a separate file)? This will solves the problem of blocks overwriting by multiple writers. Thank you Konstantin -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html