Different algorithms are used for scheduling the disk head so that seek time may be reduced. Calculate total number of heads movement for the following algorithms for the given numbers of disk cylinders. Shortest Seek Time First (SSTF) Circular Look (C-Look) Look Scan C-Scan Current Head Position: 71         Queue:  82, 153, 14, 149, 6, 189, 62, 99, 121  Direction = From current block towards right side

Programming Logic & Design Comprehensive
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ISBN:9781337669405
Author:FARRELL
Publisher:FARRELL
Chapter8: Advanced Data Handling Concepts
Section: Chapter Questions
Problem 20RQ
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. Different algorithms are used for scheduling the disk head so that seek time may be reduced. Calculate total number of heads movement for the following algorithms for the given numbers of disk cylinders.

  1. Shortest Seek Time First (SSTF)
  2. Circular Look (C-Look)
  3. Look
  4. Scan
  5. C-Scan

Current Head Position: 71         Queue:  82, 153, 14, 149, 6, 189, 62, 99, 121 

Direction = From current block towards right side

 

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