Question

Consider a disk queue with requests for i/o to blocks on cylinders 98, 183, 37, 122, 14, 124, 65, 67. Suppose sstf disk scheduling algorithm implemented to meet the requests then the total number of head movements are ................... If the disk head is initially at 53.

Answer 1

Since all device requests are linked in queues, the seek time is increased causing the system to slow down. Disk Scheduling Algorithms are used to reduce the total seek time of any request. PURPOSE. The purpose of this material is to provide one with help on disk scheduling algorithms.

Answer 2

Answer:

SSTF: 236                                                                                                                                              

FCFS: 640                                                                                                                                              

SCAN: 236

Explanation: