Consider a file system on a disk that has both logical and physical block sizes  of 512 bytes. Assume that the information about each file is already in memory. For each of the three  allocation strategies (contiguous, linked, and indexed), answer the following question: If we are  currently at logical block 10 (the last block accessed was block 10) and want to access logical block 4,  how many physical blocks must be read from the disk?

Q: Consider a file whose size varies between 2KB and 8MB during its lifetime. It is required that the…

A: Explanation: Here, the file size varies between 2KB and 8MB during its lifetime. One can use…

Q: c. In a dynamic partitioning approach for memory management we could use a bitmap or a linked list…

A: i) Briefly explain why linked lists are normally the preferred option. ii) Briefly explain 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: Disk I/O: Consider a magnetic disk with N cylinders rotating at a speed of R revolutions per minute.…

A: Actually, OS is an system software which manages computer hardware and software.

Q: espectively in that order. These partitions need to be allocated to five processes of sizes 257KB,…

A: In next fit algorithm, choose the next free available block which is big enough to accommodate the…

Q: Consider the Buddy algorithm for memory allocation used in traditional UNIX. Suppose the memory is…

A: The operating system is used to allocate the memory for the process called memory management. There…

Q: Now, we consider a 16-byte, four-way, fully- associative cache. Since the capacity of the cache is…

A: The Answer for the given question is in step-2.

Q: Consider a file system that uses a modifed contiguous-allocation scheme with support for extents. A…

A: a. Advantages: There is no possibility of external fragmentation since we can easily repurpose the…

Q: Consider a file system that uses a modifed contiguous-allocation scheme with support for extents. A…

A: Part -A) Advantage : If all extents are of the same size, and the size is predetermined, then it…

Q: 185, 17, 124, 83, 40, 29, 76, 112 Identify the disk scheduling algorithms based on the following…

A: There are mainly 6 types of disc scheduling algorithm performed to satisfy requests. They are:…

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 file currently consisting of 100 blocks. Assume that the file-control block (and the…

A: From the given data, Contiguous: file is usually accessed sequentially, if the file is smallLinked:…

Q: Consider a file system that uses a modifed contiguous-allocation scheme with support for extents. A…

A: a) All extents are of the same size, and the size is predetermined : The block allocation scheme is…

Q: Consider a file system that uses a modifed contiguous-allocation scheme with support for extents. A…

A: STEP BY STEP COMPLETE SOLUTION REGARDING YOUR PROBLEM

Q: Consider a disk queue with requests for 1/O to blocks on cylinders 82,170,43,140,24,16,190 The head…

A: Let's understand step by step :   1.  FCFS FCFS means First Come First Serve. The request which…

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: head is at cylinder 130. The request queue is given as follows: 150, 40, 350, 100, 280 For each of…

A: Here in this question we have given a disk with 400 cylinder and we have also given some request to…

Q: s initiall s are n ovemer

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Q: . Suppose that a disk drive has 200 cylinders, numbered 0 to 199 and the disk head is initially at…

A: We are going to find out the distance in terms of cylinder using following disk scheduling…

Q: 2. Suppose we have the diagram of memory shown below under a dynamic partitioning scheme. Blue areas…

A: 1st Question Answer The Maximum size of the swapped process must be 5M-byte since the process that…

Q: 2. Consider a file currently consisting of 100 blocks. Assume that the file-control block (and the…

A: Contiguous allocation is a method of allocating disk space for files where each file occupies a set…

Q: 9.- If I have a hard disk that physically has 500 cylinders, 8 surfaces and 19 sectors per track. In…

A: Solution:--   1)The given question is related with an theory part to be answered with the help of…

Q: Now, we consider a 16-byte, four-way, fully-associative cache. Since the capacity of the cache is 16…

A: Given the block index size = 2 bits, the tag bits = 12 bits. For a memory trace record such as: L…

Q: If P6 is allocated, what is the BA? ||

A: Here is the solution:

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

A: Intro In given question, we have partitions and i have assumed partitions are fixed that means only…

Q: Consider a file system that uses a modifed contiguous-allocation scheme with support for extents. A…

A:

Q: For these questions, assume that memory partitions can be subdivided; multiple processes may fit in…

A: The solution is an given below :

Q: Consider a file currently consisting of 90 blocks. Assume that the file control block (and the index…

A: Consider a file currently consisting of 90 blocks. Assume that the file control block (and the index…

Q: Question 2: This diagram shows an example of memory configuration under dynamic partitioning, after…

A: a). In the allocation diagram 2M process is placed and before that 1M is free. So if it was free…

Q: Exercise 9.15 Modern disks often have their own main memory caches, typically about 1 MB, and use…

A: 1. The pre-fetching done at the disk level varies widely across different drives and manufacturers,…

Q: Consider a file system on a disk that has both logical and physical block sizes of 512 bytes. Assume…

A:

Q: Consider a file system that uses a modifed contiguous-allocation scheme with support for extents. A…

A: A) All extents are of the same size, and the size is predetermined. If every extents is of the same…

Q: Stored on a disk. Suppose that we have an ordered file of 30,000 reconds with block size. 1024…

A: Here we have to find the average number of blocks to search for a record with and without index. It…

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: Consider a file currently consisting of 83 blocks. Assume that the file control block (and the index…

A: Approach to solving the question: Let's calculate the number of disk I/O operations required for…

Q: If P3 is allocated, what is the BA? The updated free list is: BA: ; Sz: → BA: ; Sz: → BA: ; Sz: →…

A: We will use fcfs technique to solve the above problem Given: p1 = 500 p2 = 600 p3 = 1300 p4 = 2000…

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

A: 1. FCFS (First Come First Served)

Q: Consider a file system that uses a modifed contiguous-allocation scheme with support for extents. A…

A: There are three major methods of storing files on disks:contiguouslinkedindexedcontiguous…

Q: Consider a file system that uses a modifed contiguous-allocation scheme with support for extents. A…

A: Introduction: File System Management: The system keeps tracks of the free disk blocks for allocating…

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: