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 al ready in memory. For each of the three allocation strategies (contiguous, linked, and indexed), answer these questions: a. How is the logical-to-physical address mapping accomplished in this system? (For the indexed allocation, assume that a file is always less than 512 blocks long.) b. 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

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 al ready in memory. For each of the three allocation strategies (contiguous, linked, and indexed), answer these questions: a. How is the logical-to-physical address mapping accomplished in this system? (For the indexed allocation, assume that a file is always less than 512 blocks long.) b. 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

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

See similar textbooks

Related questions

Q: UNIX treats file directories in the same fashion as files; that is, both are defined by the same…

A: In Unix-based systems, files and directories are governed by permissions determining access control.…

Q: Take into account the following scenario: we have a byte-addressable computer with 2-way set…

A: We are given a set associative cache mapping with cache blocks, block size and main memory address.…

Q: file F whose data is spread over 1000 physical disk blocks on the disk. Assume the size of a logical…

A: Dear Student, The answer to your question with required explanation is given below -

Q: Suppose that you have a UNIX file system where the disk block size is 4096 bytes. Disk addresses and…

Q: 1.In the Readers-Writers problem, more than one writer can access the buffer at the same time to…

A: “Since you have posted multiple questions, we will provide the solution only to the first 3…

Q: iii. Briefly explain the working of the best fit algorithm to allocate processes to memory when…

A: Below is the complete solution with explanation in detail. Below is the explanation about working…

Q: a. Suppose that the pointer to the free-space list is lost. Can the system reconstruct the…

A: The question is multiple type question. Hence only first question has been answered. The remaining…

Q: Assume a hypothetical system where disk space has been divided into disk blocks of 25 bytes. The…

A: Answer:- 1. Linked List Allocation Each file consists of a linked list of disc blocks that do…

Q: Take into account the following scenario: we have a byte-addressable computer with 2-way set…

A: Virtual Memory Organization: The RAM and caches that make up the contemporary computer system's…

Q: Suppose that you have a UNIX file system where the disk block size is 4096 bytes. Disk addresses and…

Q: Consider a computer with 128 MB of main memory, 64 KB of cache, and 4 bytes per memory block. Find…

A: Block size = 4B So block offset bits = log 4 = 2 bits. Total number of cache block = 64/4 = 16…

Q: Discuss the First-Come, First-Served (FCFS) disk scheduling algorithm. Please explain this algorithm…

A: The First-Come, First-Served (FCFS) disk scheduling algorithm is a method used to determine the…

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: 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: For Heap File with a page directory, assume that a page can contain up to 100 directory entries and…

A: Given Statement: In this question firstly we will find out what is already given in our question.…

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

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

A: Here is the solution:

Concept explainers

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:

Question

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 al ready in
memory. For each of the three allocation strategies (contiguous, linked, and
indexed), answer these questions:
a. How is the logical-to-physical address mapping accomplished in this
system? (For the indexed allocation, assume that a file is always less than
512 blocks long.)
b. 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

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.

Similar questions

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 al ready in memory. For each of the three allocation strategies (contiguous, linked, and indexed), answer these questions: a. How is the logical-to-physical address mapping accomplished in this system? (For the indexed allocation, assume that a file is always less than 512 blocks long.) b. 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
Take into account the following scenario: we have a byte-addressable computer with 2-way set associative mapping, 16-bit main memory addresses, and 32 blocks of cache memory. Since there are 8 bytes in a block, you can use that information to calculate how big the offset field has to be.
Consider a memory of size 8KB (8192 bytes) that allows dynamic, variable sized partitioning among processes and uses a linked list to keep track of free spaces (hereafter referred to as the free list) in the memory at any given time. Assume that there are 6 processes and assume that their memory size requirements (in bytes) are as given below: Р1: 500, Р2: 600, Р3: 1300, Р4: 2000, Р5: 100, Р6: 200 Assume that the initial state of the free list is as shown below (BA is the base address and Sz is the size of each free space): ВА: 0; Sz: 1100 — ВА: 1200; Sz: 600 > BА: 2000; Sz: 1800> ВА: 6000%; Sz 400
Consider a fixed partitioning scheme with equal-size partitions of 2¹6 bytes and a total main memory size of 224 bytes. A process table is maintained that includes a pointer to a partition for each resident process. How many bits are required for the pointer?
Take into account the following scenario: we have a byte-addressable computer with 2-way set associative mapping, 16-bit main memory addresses, and 32 blocks of cache memory. Since there are 8 bytes in a block, you can use that information to calculate how big the offset field has to be.
Requests are not usually uniformly distributed. For example, a cylinder containing the file system FAT or inodes can be expected to be accessed more frequently than a cylinder that only contains files. Suppose you know that 50 percent of the requests are for a small, fixed number of cylinders. a. Would any of the scheduling algorithms discussed in this chapter be particularly good for this case? Explain your answer. b. Propose a disk-scheduling algorithm that gives even better performance by taking advantage of this "hot spot" on the disk. c. File systems typically find data blocks via an indirection table, such as a FAT in DOS or inodes in UNIX. Describe one or more ways to take advantage of this indirection to improve the disk performance.
Consider a paged virtual memory system in which a process is allocated with 4 frames. The contents of the page map table are given below with two frames being empty. PageActual frame address in memory 4 122 344 477 898 Assume that the order in which the pages appear is the order in which the pages were added to the table (i.e., Page 2 was accessed after Page 4) Assume that the subsequent page accessing is : 1,2,3,4,1,2,5 Using LRU page-replacement algorithm, What frame is accessed by Page 5. 477 O 344 122 O 898