A disk drive has 1000 cylinders, numbered 0-999. The driver is currently serving a request at cylinder 650 and the head was previously serving a request at cylinder 380. The queue of pending requests is in the order received as below: 455 207 638 782 132 56 222 890 686 422 By referring to the above cylinders, solve the total head movements using the following disk seek strategies: (i) FCFS Scheduling ,SSTF Scheduling, SCAN Scheduling and LOOK Scheduling

Q: Q1. Different algorithms are used for scheduling the disk head so that seek time may be reduced.…

A: Given : Queue =98, 183, 37, 122, 14, 124, 65, 67 disk head = cylinder 53 FCFS: first come first…

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

A: CPU Scheduling is a cycle of figuring out which cycle will possess CPU for execution while another…

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: suppose that a disk drive has 200 tracks, numbered 0 to 199. The drive is currently serving a…

A:

Q: llocation Max АВCD Available BCD АВCD 101 8532 2301 020 3220 021 6022 instant, P0 requests (0, 2, 0,…

A: Let's calculate the need matrix.  Need = maximum-allocation   A B C D P0 8 4 3 1 P1 0 2 0 0…

Q: serving a request at track 143, and the 05. Suppose that a disk drive has 5000 tracks The drive is…

A: The Answer is

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

A:

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

A: C-LOOK Disk Scheduling Algorithm- Circular-LOOK Algorithm is an improved version of the LOOK…

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

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

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: c) Given a list of holes in a variable partition, the memory system contains the following entries…

A: The question is to allocate the memory blocks for the processes using Best Fit and Worst Fit…

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

A: Algorithm: An algorithm is a set of instructions designed to perform a specific task. This can be a…

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

A: Shortest Seek Time First : In this disk scheduling algorithm, it starts from the head position to…

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

A: Shortest Seek Time First Algorithm - In this disk scheduling algorithm, it executes the request…

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

A: Shortest Seek Time First : In this disk scheduling algorithm, it starts from the head position to…

Q: An operating system uses a Least Recently Used, optimal and also FIFO page replacement algorithm.…

A: Assume that the frames are initially empty. The red boxes depict a miss and the green boxes depict a…

Q: An operating system uses a Least Recently Used, optimal and also FIFO page replacement algorithm.…

A: The Answer is in Below Steps

Q: Solve the following exercise on dynamic partition If you have a 210K memory and you have the…

A: In this case: total memory we have is 210k We need to the scheduling   initially, in the memory we…

Q: Consider the dynamic memory layout shown below (the shaded blocks are already allocated). Draw to…

A:

Q: uppose there are memory partitions of 455 KB, 305 KB, 355 KB and 655 KB. These partitions are in…

A: a) First fit: It start from the beginning, scans the list and it will be found out what are the…

Q: Consider a disk sequence with 100 cylinders. The request to access the cylinder occur in the…

A: Given: To solve disk scheduling problem.

Q: Given: Work Queue: 56, 21, 44, 93, 67, 7, 32, 79, 20, 85 Total Cylinder: 0 - 99 Starting…

A: As per our guide lines, only three sub parts will be answered. So, please repost the remaining…

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

A: The most straightforward disc scheduling algorithm is FCFS. As the name implies, this method…

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

A: In FCFS scheduling algorithm, the head moves to the tracks in the same requested order So all the…

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: 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: Allocation Max Available АВCD АВCD АВCD PO 0101 8532 2301 P1 3020 3220 P2 3021 6022 At this instant,…

A: Let's calculate the need of each process.  Need = maximum-allocation   A B C D P0 8 4 3 1 P1…

Q: Consider the following snapshot of a system: Allocation Мах Available АВCD АВCD АВСD Po P1 P2 P3…

A: Given 5 processes P0, p1, p2, p3 and p4 with their allocated and maximum resources. Need resources=…

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

A: After taking the disk drive which s having 5000 cylinders numbered from 0 to 4999. The drive is…

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

A: The total distance that the disk arm moves to satisfy all the pending requests for each of the…

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

A: EXPLANATION: C-SCAN: C-SCAN moves the head from one end to the other, serving all demands.…

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

A: Starting from head position the total distance that the disk arm moves to satisfy all the pending…

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

A: Starting from head position the total distance that the disk arm moves to satisfy all the pending…

Q: uppose there are memory partitions of 200 KB, 600 KB, 300 KB, 400 KB and 700 KB. These partitions…

A: GIVEN: Suppose there are memory partitions of 200 KB, 600 KB, 300 KB, 400 KB and 700 KB. These…

Q: Recall that we have two write policies and write allocation policies, and their combinations can be…

A:

Q: a) Given Static memory partitions shown in the following picture, Draw diagrams on how would each of…

A: As per guidelines I am allowed to answer only one question. First fit: In first fit, the first…

Q: a) Given Static memory partitions shown in the following picture, Draw diagrams on how would each of…

A: Given three questions are independent. As per our guidelines only one question is answered at a…

Q: T1 T2 Read(x) Read(x) х-у-50%; Read(y) y=y+50; read(z) x=y-50; Read(y) y=y+50; read(z) z=z+100;…

A: 1. Is the schedule recoverable? 2. Use two-phase and time-stamp based protocol to resolve…

Q: Consider the dynamic memory layout shown below (the shaded blocks are already allocated). Draw to…

A: Worst-fit Algorithm: In the Worst Fit Algorithm, The algorithm begins by scanning all of the…

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: What problem is solved by Dijkstra's banker's algorithm? a. mutual exclusion b. deadlock recovery c.…

A: Given that, The problem is solved by Dijkstra's banker's algorithm :

Q: Consider a program consists of five segments: S0 = 600, S1 = 14 KB, S2= 100 KB, S3 =580 KB and S4 =…

A: The answer to the first three subparts is given below. Please repost the question with the fourth…

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

A: "Since you have posted a question with multiple subpart, we will solve the first three subpart for…

Q: Process Arrival time Priority Burst time P1 8 P2 P3 9 4 8 P4 8 2 10 P5 3 3 2 Now, Calculate the…

A:

Q: Suppose that the Sailor table has 50 tuples (or records) stored in 5 disk blocks and the Reserve…

A: The answer is NONE OF THE ABOVE In block nested loop join, for a block of outer relation, all the…

Q: Given five memory partitions of 400 KB, 900 KB, 300 KB, 200 KB, and 700 KB (in order), how would…

A: Answer: Best fit 3