The SCAN scheduling algorithm ____.
A) services the request with the minimum seek time
B) services the request next to the current head position in the direction of the head movement
C) chooses to service the request furthest from the current head position
D) services the request next to the current head position in the opposite direction of the head movement

Question

Quizplus · Accepted Answer

The SCAN scheduling algorithm services the request next to the current head position in the direction of the head movement, which helps in reducing the average seek time by avoiding unnecessary head movements. Option A is incorrect as it does not consider the direction of the head movement. Option C is incorrect as it may cause longer seek times, leading to poor performance. Option D is incorrect as it moves the head in the opposite direction, causing unnecessary movements and increasing seek time.

The SCAN Scheduling Algorithm ____