push @{$self->{data}}, {device => $i[0], rrqm => $i[1], wrqm => $i[2],
            r => $i[3], w => $i[4], rmb => $i[5], wmb => $i[6], avgrq => $i[7],
            avgqu => $i[8], await => $i[9], svctm => $i[10], util => $i[11],
            elapsed_time => $self->{elapsed_time}};