Maurice Tutor

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    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Oct-2001 - Nov-2016

Category > Computer Science Posted 10 Aug 2017 My Price 8.00

disk’s outer track

rite a program that will simulate the FCFS, SSTF, LOOK, and C-LOOK seek optimization strategies. Assume that:

a. The disk’s outer track is the 0 track and the disk contains 200 tracks per surface. Each track holds eight sectors numbered 0 through 7.

b. A seek takes 10 + 0.1 * Tms, where Tis the number of tracks of motion from one request to the next, and 10 is a movement time constant.

c. One full rotation takes 8 ms.

d. Transfer time is 1 ms.

 

Use the following data to test your program:

 

Arrival time

Track requested

Sector requested

0

45

0

23

132

6

25

20

2

29

23

1

35

198

7

45

170

5

57

180

3

83

78

4

88

73

5

95

150

7

 

For comparison purposes, compute the average, variance, and standard deviation of the time required to accommodate all requests under each of the strategies. Consolidate your results into a table.

Optional: Run your program again with different data and compare your results.

Recommend the best policy and explain why.

Answers

Maurice Tutor
(5)
Status NEW Posted 10 Aug 2017 07:08 PM My Price 8.00

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