parameter: name='tracked_f1'
[0]
output:  name
sh:
    dd if=/dev/urandom of=${name} count=1000

[1]
output:  'd1/tracked_f2'
sh:
    dd if=/dev/urandom of=${output} count=5000
    dd if=/dev/urandom of=d1/untracked_f4 count=50

[2]
output:  'd2/d3/tracked_f3'
sh:
    dd if=/dev/urandom of=${output} count=600