> (see the sentence that begins Note in documentation for iodepth - > https://fio.readthedocs.io/en/latest/fio_man.html#cmdoption-arg- > iodepth > ). In your output we can see you have "ioengine=psync" which is > synchronous. Getting ahead of ourselves note that very recent ZFS This question has come up before... maybe a warning message when iodepth is being ignored would help users?