SCAN Scheduling is a disk scheduling algorithm used in operating systems to manage how data is read from and written to a disk. It operates by moving the disk arm in one direction, servicing all requests in that path until it reaches the end, then reversing direction and servicing requests on the return trip. This method helps reduce the average wait time for disk access. The name SCAN comes from the way the disk arm scans back and forth across the disk. This approach is efficient for handling requests that are clustered together, as it minimizes the distance the arm must travel, leading to faster data retrieval and improved overall system performance.