bonnie_opts="${bonnie_opts} -s 4096 -r 2048"
setup() {
  mdmfs -S -t -s 6g -w "${bonnie_uid}:0" md "${scratch}"
}
teardown() {
  md="$(mount | grep ' on '"${scratch}"' ' | cut -d' ' -f1)"
  umount "${scratch}"
  mdconfig -d -u "${md}"
  clean_scratch
}