title   "Combined IO"
area    :first
vtitle  "blocks"

field :down, :color => "blue",
               :alias => "Writes",
               :data  => "sumSeries(derivative(mw*.munin.iostat.dev*_write))"

field :up, :color => "green",
               :alias => "Reads",
               :data  => "sumSeries(derivative(mw*.munin.iostat.dev*_read))"