Figure 2: Predicted average access time compared to simulated access time. Request stream and disk behavior are generated according to model assumptions. Note that the curves for theoretic and simulated results are not visibly discernible for either SCAN or C-SCAN. In each case the radii were uniformly distributed between 0 and 1, was 3 cm/sec, every job had a fixed size of 5 sec, and 2 million requests were simulated. Similar agreement was seen across a range of parameters and distribution choices.