It is important that disk service be as fast as possible because most processes depend on heavily on the disk for loading and input and output files.

Data:

Queue (Track no.):5,20,7,99,56,75, 19,89,2,50

Current Head Position :15

Current Direction:Towards track O

Track Range:0-99

First - Come - First-Served (FCFS) Scheduling

Shortest-Seek-Time-First (SSTF) Scheduling

Scan Scheduling

Circular - SCAN (C-SCAN) Scheduling