Suppose the head of a moving-head disk with 200 tracks numbered 0 to 199 is currently serving a request at track 99 and has just finished a request at track 125. The queue of outstanding requests in FIFO order is: 5, 95, 75, 100,30 and 155. What is the total number of head movements (in cylinders) for the following disk-scheduling algorithms? a.FCFS Scheduling b.SCAN Scheduling  c.SSTF Scheduling

Q: Consider an ordered disk queue with requests involving tracks 97,145,22,14,124,65 and 67. if the…

A: Answer the above question are as follow

Q: Find out the average waiting time, average response time and average turnaround  time of the…

A: A)

Q: Select the correct answer: The illustration with a request queue (0-199), by using the SCAN…

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Q: Suppose that a disk drive has 200 cylinders, numbered from 0 to 199. The drive is currently serving…

A: Answer: I have given answered in the handwritten format in brief explanation.

Q: Consider an ordered disk requests queue with involving

A: Total distance to satisfy pending request in C-SCAN = 367

Q: Find out the total Head Movement of the Disk Head for the following request queue: 98, 183, 37, 122,…

A:

Q: The disk has 200 tracks numbered from 0-199. The head pointer is currently positioned at 112 moving…

A: Here in this question we have given some disk request and we have asked to find total head movement…

Q: 1. Assume that all data and metadata begin on disk. Assume further that all inodes are in separate…

A: The answer is given below:

Q: Assume the disk contains 100 cylinders (0-99), the head starts at 20, and the queue contain the…

A: The tracks needed here, For this question

Q: Suppose that a disk drive has 40 cylinders, numbered 0 to 40. The drive is currently serving a…

A: Operating systems use a disk scheduling algorithm to schedule I/O requests that arrive at the disk.…

Q: b) Consider a disk queue with requests for I/O to blocks on cylinders 108, 193, 51, 132, 24, 134,…

A:

Q: Consider a system where free space is kept in a free-space list. a. Suppose that the pointer to the…

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Q: c) Suppose a disk has 300 cylinders, numbered from 0 to 299. The drive is currently serving an I/O…

A: (i) SSTF Total head movements- 10+24+10+75+10+18+3+18=168

Q: Suppose the head of a moving-head disk with 200 tracks numbered 0 to 199 is currently serving a…

A: Disk Scheduling Algorithms are used to decrease any request's total seek time and schedule I/O…

Q: Different algorithms are used for scheduling the disk head so that seek time may be reduced.…

A: note: we are not allowed to solve more than 3 subparts in one question. please post them separately.…

Q: Suppose that a disk drive has 200 cylinders num- bered 0 to 199. The drive is currently serving a…

A: The Answer is

Q: Consider the following augmentation of a remote-file- access protocol. Each client maintains a name…

A:

Q: Suppose a file system is based on the indexed allocation strategy for managing blocks. Assume each…

A: The solution for the above given question is given below:

Q: Selects the disk I/O request that requires the least amount of travel from the current position of…

A: here in this problem given information is disk with tracks numbered from 0 to 255 and  The disk arm…

Q: 5) A hard disk (with sectors numbered 0 - 255) currently has its head positioned at sector 73. We…

A: Given that, The number of sectors are 256 from 0 to 255. Initial head position= 73 Queue of disk…

Q: Disk requests are received by a disk drive for cylinders 13 , 6 , 1 , 29 , 28 , 8 in that order and…

A: Given data:- Disk requests are received by a disk drive for cylinders 13 , 6 , 1 , 29 , 28 , 8 in…

Q: d minimu

A: It is given that the file system uses contiguous allocation and the disk consists of 100 data…

Q: If disk queue with requests for I/O to blocks on cylinders.98, 183, 37, 122, 14, 124, 65, 67. Assume…

A: What is SSTF (Shortest Seek Time First) scheduling: - In SSTF scheduling, the head reader moves…

Q: For a 100-cylinder disk, compute the total number of head movements for the request queue provided…

A: In FCFS, the request which arrives first will we served first.

Q: 5. Suppose that a disk drive has 40 cylinders, numbered 0 to 40. The drive is currently serving a…

A:

Q: Suppose the head of a moving-head disk with 200 tracks numbered 0 to 199 is currently serving a…

A: Given: Assume the head of a moving-head disc contains 200 tracks numbered 0 to 199, and it is now…

Q: How many data block accesses on the average are needed to fetch a record by using linear search?

A: A linear search or sequential search is a method for finding an element within a list.

Q: A disk drive has 1000 cylinders, numbered 0-999. The driver is currently serving a request at…

A: 1 FCFS is First Come First Serve 2 SSTF is Shortest Remaining Time First 3 SCAN in this, Head goes…

Q: Suppose that we have a magnetic disk with the following structure: Each sector is fixed at 512…

A: a) Number of sectors in one cluster = 4 Size of each sector = 512 Bytes Size of each cluster =…

Q: uppose the read/write head of a disk is sitting at track 8. Requests to access he following tracks…

A: Here in this question we have given 8 request to be serviced. Currently head pointer is at 8.using…

Q: Consider there are two set of processes Set1 has processes with longer burst times than Set2. The…

A: "Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Hi, please solve it correctly ,else i will downvote Consider the following disk request sequence…

A: Solution :-  Given,  Total number of tracks = 100 but it should be 200 because request sequence is…

Q: Assume that you have a disk that has 191 tracks (numbered 0- 190) and the header current position is…

A: FCFS: First Come First Serve It is similar to FIFO. It is simple, fair approach but perhaps not the…

Q: Consider a disk queue with requests for I/O to blocks on cylinders 47, 38, 121, 191, 87, 11, 92, 10.…

A: Introduction:Given, request for I/O to blocks on cylinders 47, 38, 121, 191, 87, 11, 92 and…

Q: Consider an ordered disk queue with requests involving tracks 97,145,22,14,124,65 and 67. if the…

A: C-SCAN is a varient of scan designed to provide a more uniform wait time.

Q: 8. Consider one disk with 400 cylinders, numbered 0 to 399. Assume the current position of head is…

A: Solution:- Above all question can be solved as:-

Q: Calculate the number of disk tracks traversed using the FCFS, SSTF, SCAN, and LOOK algorithms for…

A: Performance: The speed of the CPU is a key factor that often decides the performance of the system.…

Q: 8. Consider one disk with 400 cylinders, numbered 0 to 399. Assume the current position of head is…

A:

Q: Find the total head movements for a request queue given below, using FCFS scheduling for a disk of…

A: The given I/O blocks for FCFS Scheduling 75, 25, 30, 68, 40, 89, 10 where head is initially at…

Q: Suppose that a disk drive has 5,000 cylinders, numbered 0 to 4,999. The drive is currently serving a…

A:

Q: Suppose that a block is 1K Byte and that a disk address is 4 bytes. Suppose that files are…

A: file: Collection of logically related entites. All attributes of file are called file context.

Q: Consider the CLOCK page replacement policy. Assume that there are only 3 page slots available in…

A: The correct answer is option A. The given page reference sequence is :  0, 4, 1, 4, 2, 4, 3, 4…

Q: SSTF scheduling algorithm, a) What is the order that the requests are serviced, assuming the disk…

A: EXPLANATION SSTF stands for Shortest Seek Time First. As the name suggests the tracks that are…

Q: Create a diagram using the following algorithms. First Come First Serve(FCFS) Shortest Seek Time…

A: In FCFS:-  The job that arrived 1st in the ready/request queue is allocated to the CPU and then the…

Q: Consider a disk queue holding requests to the following cylinders in the listed order: 116, 22, 3,…

A: Answer to the above question is in step2.

Q: . Q: In this problem you are to compare reading a file using a single-threaded file server and a…

A:

Q: Suppose following sequence of disk track requests: 27, 129, 110, 186, 147, 41, 10, 64, 120. Assume…

A: The SSTF schedule is : 100,110,120,129,147,186,64,41,27,10 = (110-100) + (120-110) + (129-120) +…

Fundamentals of memory

A collection of connected storage devices form the memory unit. It is a space to store data and instructions required for processing. Information is stored in a memory unit in the form of bits. There are two types of memory namely: