erviced was at tracks ing towards track 0. contains requests for 874, 692, 475, 105, ation using C-SCAN

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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On a disk with 1000 cylinders, numbers 0 to 999,
compute the number of tracks the disk arm must
move to satisfy all the requests in the disk queue.
Assume the last request serviced was at tracks
345 and the head is moving towards track 0.
The queue in FIFO order contains requests for
the following tracks. 123, 874, 692, 475, 105,
376. Perform the computation using C-SCAN
scheduling algorithm. What is the total distance?
Transcribed Image Text:On a disk with 1000 cylinders, numbers 0 to 999, compute the number of tracks the disk arm must move to satisfy all the requests in the disk queue. Assume the last request serviced was at tracks 345 and the head is moving towards track 0. The queue in FIFO order contains requests for the following tracks. 123, 874, 692, 475, 105, 376. Perform the computation using C-SCAN scheduling algorithm. What is the total distance?
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