Problem Statement
Which scheduling algorithm attempts to reduce disk arm movement by servicing requests in the direction of the arm until it reaches the end and then reversing?
Explanation
The SCAN disk-scheduling algorithm (also called elevator algorithm) moves the disk arm in one direction servicing all pending requests until it hits the end then reverses direction. This reduces seek time by preventing arm starvation and back-and-forth movement. Understanding disk scheduling links file system and device management topics. :contentReference[oaicite:6]{index=6}
