This document discusses and compares several disk scheduling algorithms: First Come First Serve (FCFS), Shortest Seek Time First (SSTF), SCAN, and LOOK. FCFS services requests in the order they arrive, which can result in long seek times. SSTF selects the nearest request regardless of order, reducing seek time but allowing starvation. SCAN services requests by scanning continuously from outer to inner tracks then back, while LOOK only moves as far as needed in each direction before reversing. Examples are provided to illustrate the performance of each algorithm.