Long description

The figure shows a block labeled cylinder consisting of 40 columns. Columns 1, 9, 11, 12, 16, 34, and 36 are marked X. Column 11 is labeled initial position. A zig-zag line labeled sequence of seeks is plotted below the block whose vertical axis is labeled time. It starts below column 11, moves toward the lower right until column 36, then moves toward the lower left and ends below column 1.