Maurice Tutor

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About Maurice Tutor

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Expertise:
Algebra,Applied Sciences See all
Algebra,Applied Sciences,Biology,Calculus,Chemistry,Economics,English,Essay writing,Geography,Geology,Health & Medical,Physics,Science Hide all
Teaching Since: May 2017
Last Sign in: 399 Weeks Ago
Questions Answered: 66690
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Education

  • MCS,PHD
    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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  • Professor
    Phoniex University
    Oct-2001 - Nov-2016

Category > Computer Science Posted 21 Jul 2017 My Price 6.00

average-case access

Assume a disk with the following characteristics:

Number of sectors per track = 20

Number of tracks per surface = 50

Number of surfaces = 2 (called a double-sided disk)

Number of characters per sector = 1,024

Arm movement time = 0.4 msec to move 1 track in any direction Rotation speed = 2,400 rev/min

1. How many characters can be stored on this disk?

2. What are the best-case, worst-case, and average-case access times for this disk? (Assume that the average eek operation must move 20 tracks.)

3. What would be the average case access time if we could increase the rotation speed from 2,400 rev/min to 7,200 rev/min?

4. Defragmenting a disk means to reorganize files on the disk so that as many pieces of the file as possible are stored in sectors on the same track, regardless of the surface it is on. Explain why efragmentation can be beneficial.

Answers

Maurice Tutor
(5)
Status NEW Posted 21 Jul 2017 07:07 AM My Price 6.00

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