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, and columns 12 and 16 are labeled pending requests. A zig-zag line labeled sequence of seeks is plotted below the block whose vertical axis is labeled time. It starts below column 12, goes down, and ends at the lower right end.