Question: Suppose the read/write head is at track 97, moving toward track 199 (the highest numbered track on the disk) and the disk request queue contains

Suppose the read/write head is at track 97, moving toward track 199 (the highest numbered track on the disk) and the disk request queue contains read/write requests for sectors on tracks 84, 155, 103, 96, and 1978, respectively.

a. What is the total number of head movements needed to satisfy the requests in the queue using the FCFS optimization strategy?

b. What is the total number of head movements needed to satisfy the requests in the queue using the Scan optimization strategy?

c. What is the total number of head movements needed to satisfy the requests in the queue using the Look optimization strategy?

Step by Step Solution

★★★★★

3.34 Rating (163 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

The blocks to be read are 97 84 155 103 96 and 197 a FCFS ... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

34-E-CE-OS (424).docx

120 KBs Word File

Students Have Also Explored These Related Computer Engineering Questions!

What is the total number of electrons that can be held in all orbitals having the same principal quantum number n?

What is the total number of lines a grating must have in order just to separate the sodium doublet ( 1 = 5895.9 , 2 = 5890.0 ) in the third order?

What is the total number of nodes in the 3 and 4 molecular orbitals of 1,3-butadiene?

CSC 425 Operating system (10) 2. If the read/write head is on track 100 of a hard dlisk moving toward track 199 (highest numbered track on the disk) and the disk request queue contains read/write...

Suppose that the head of a disk with 256 tracks, numbered 0 to 255, is currently serving a request at track 58. The previously served request was at a lower-numbered track (i.e., the head is...

Assignment 7 1. Briefly explain the differences between seek time and search time. In your opinion, why do some people confuse the two? 2. Given the following characteristics for a magnetic tape...

Suppose that the head of a moving disk with 2 0 0 tracks, numbered 0 to 1 9 9 , currently serving a request at track 1 4 3 and has just finished a request at track 1 2 5 . The queue of pending track...

1 . Given a disk with 1 2 0 tracks with the read / write head originally positioned at track 5 , compute the total and average track traversals to satisfy the following requests using FCFS , SSTF ,...

Question 1 A disk queue is holding requests to the following cylinders in the order: 1 1 0 , 1 2 , 1 5 , 2 0 , 7 0 , 1 4 5 , 9 0 , 8 0 . What is the order that the requests are serviced for the...

Please help me with my Operating Systems assignment. Magnetic Disk Case Study Some key parameters for a recent 2.5-inch drive for laptop computers. Size 80GB per surface Platters/Heads 2/4 Capacity...

As a project manager, you have been assigned to oversee the development of a website for a fictitious company called "TechCo." The website will serve as an online platform for the company's products...

You plan to purchase a house after 4 years which is expected to cost rs. 22.5M at that time. For that you save an amount today for 8M at a rate of 14% p.a. If the anticipated inflation rate expected...

Content Area If the seller permits merchandise to be returned or an allowance to be made, it is customary for the seller to issue a(n) a. return memorandum. b. credit memorandum. c. debit memorandum....

Darryl is the sole proprietor of a motorcycle shop. During the present year, Darryl had $32,000 of adjusted gross income before considering the tax effect of the following transactions. Darryl has no...

3. (10 points) A seven-segment display indicates a single decimal digit as a subset of lighted segments labeled A through G as shown below, where a 1 in the table indicates that the corresponding...

Jamie Lee and Ross, now 57 and still very active, have plenty of time on their hands now that the triplets are away at college. They both realized that time has just flown by; over twenty-four years...

write a research paper ,the paper should be in the form of a discussion of leadership and management approaches to a specific cybersecurity topic. Example 1: Incorporating Emerging Technologies Into...

Question: Go back into the second set of notes on Cohen and re-read the Larry case. I have tried to explain why Larry is bullshitting his wife rather than misleading her when he answers her question...

Your local movie theater uses the same group-pricing strategy described in the chapter charge different prices for adults, children, seniors, and students. However, the theater uses one additional...

Briefly define the seven RAID levels.

Consider a program that accesses a single I/O device and compare un-buffered I/O to the use of a buffer. Show that the use of the buffer can reduce the running time by at most a factor of two.

a. Perform the same type of analysis as that of Table for the following sequence of disk track requests: 27, 129, 110, 186, 147, 41, 10, 64, 120. Assume that the disk head is initially positioned...

in which stage of the PICERL model would you be looking for the root cause of an incident?

Hayley's Optical has a stockholders' equity account as shown below. The firm's common stock currently sells for $20 per share. Preferred Stock $500,000 Common Stock (2,000,000 shares @ $1...

A product developer at a cosmetics company has developed a new shampoo especially for redheads. In order to know if it is worthwhile to launch the product in Tasmania, the marketing manager needs an...