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Recent questions tagged disk-scheduling

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37
Galvin Edition 9 Exercise 10 Question 3 (Page No. 497)
Why is rotational latency usually not considered in disk scheduling ? How would you modify $SSTF$, $SCAN$, and $C-SCAN$ to include latency optimization ?
Why is rotational latency usually not considered in disk scheduling ? How would you modify $SSTF$, $SCAN$, and $C-SCAN$ to include latency optimization ?
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38
Galvin Edition 9 Exercise 10 Question 2 (Page No. 497)
Explain why $SSTF$ scheduling tends to favor middle cylinders over the innermost and outermost cylinders.
Explain why $SSTF$ scheduling tends to favor middle cylinders over the innermost and outermost cylinders.
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39
Galvin Edition 9 Exercise 10 Question 1 (Page No. 497)
Is disk scheduling, other than $FCFS$ scheduling, useful in a single-user environment ? Explain your answer.
Is disk scheduling, other than $FCFS$ scheduling, useful in a single-user environment ? Explain your answer.
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40
How to do this question.
Disk request come into disk driver for cylinders 5, 17, 60, 125, 28, 170, 8, 32. Total moves using SCAN algorithm when disk head is currently positioned at 35 and moving toward higher cylinder number________.(Disk system has 200 cylinders (0 - 199)
Disk request come into disk driver for cylinders 5, 17, 60, 125, 28, 170, 8, 32. Total moves using SCAN algorithm when disk head is currently positioned at 35 and moving ...
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43
Self Doubt Disk Scheduling
Suppose a disk has 100 cylinders, numbered from 0 to 99. At some time the disk arm is at cylinder 20, and there is a queue of disk access requests for cylinders 10, 22, 6, 38, 2, 40, 20. No of seeks in FCFS SSTF
Suppose a disk has 100 cylinders, numbered from 0 to 99. At some time the disk arm is at cylinder 20, and there is a queue of disk access requests for cylinders 10, 22, 6...
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44
Disk Scheduling
How does LOOK algorithm decides that this is the last request? What technique is used to determine that after this request, instead of going to the end of disk, the direction should be changed?
How does LOOK algorithm decides that this is the last request? What technique is used to determine that after this request, instead of going to the end of disk, the direc...
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46
made esay test disk scheduling
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48
os syllabus doubt
which topic should i need to learn under file system and disk scheduling for gate??
which topic should i need to learn under file system and disk scheduling for gate??
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51
Disk Accessing
I solved this question correctly. I have a slight doubt though if say in question it says that Disk address is of K bits then what it represents 2^k Sectors or 2^k blocks ???
I solved this question correctly. I have a slight doubt though if say in question it says that Disk address is of K bits then what it represents 2^k Sectors or 2^k blocks...
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54
FCFS Disk Scheduling
Queue  98, 183, 37, 122, 14, 124, 65, 67 head starts at 53 Find total head movements
Queue  98, 183, 37, 122, 14, 124, 65, 67head starts at 53Find total head movements
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55
operating system disk scheduling
any shortcut method for this??
any shortcut method for this??
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56
C-SCAN and C-LOOk
No. of seek distances with C-SCAN and C-LOOK?
No. of seek distances with C-SCAN and C-LOOK?
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60
disk scheduling
In disk scheduling if header movement direction is not given then which way to move? Please provide any link or source in support of your answer. Thanks
In disk scheduling if header movement direction is not given then which way to move? Please provide any link or source in support of your answer. Thanks
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