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Articles by Arnab Chakraborty
Page 166 of 377
Copy on Write in Operating System
Copy-On-Write (COW) is a memory optimization technique used by operating systems to reduce overhead when creating new processes. It allows multiple processes to share the same memory pages until one process modifies them. When modification occurs, the OS creates a duplicate copy for the modifying process while other processes continue sharing the original page. How Copy on Write Works The COW mechanism operates through virtual memory management. When a process is created (like during fork()), instead of immediately copying all parent memory pages, the OS marks them as read-only and shares them between parent and child processes. ...
Read MoreCPU Scheduling Criteria
CPU scheduling is the process of determining which process or task is to be executed by the central processing unit (CPU) at any given time. It is an important component of modern operating systems that allows multiple processes to run simultaneously on a single processor. The CPU scheduler determines the order and priority in which processes are executed and allocates CPU time accordingly, based on various criteria such as CPU utilization, throughput, turnaround time, waiting time, and response time. Efficient CPU scheduling is crucial for optimizing system performance and ensuring that processes are executed in a fair and timely manner. ...
Read MoreDevice Management in Operating System
An essential part of an operating system is device management, which controls how software applications interact with the hardware attached to the computer system. It involves the process of detecting, configuring, allocating, and managing access to devices like printers, scanners, storage units, and network interfaces. The device management system ensures that hardware devices are used effectively by providing a consistent and reliable interface between software and hardware components. Device Management Architecture Device Management Architecture User Space Application 1 ...
Read MoreDisk Attachment in OS
Disk attachment is the process of connecting storage devices, such as hard disk drives or solid-state drives, to a computer system. This process is essential for the proper functioning of an operating system as it allows the system to read and write data to storage devices. Disk attachment can be either internal or external, and there are several methods of attachment, including SATA, SCSI, and SAS. Types of Disk Attachment There are four primary types of disk attachment methods used in modern computer systems − Disk Attachment Types ...
Read MoreDisk Controller in OS
In the world of computing, the Disk Controller is a fundamental component that manages data transfer between a computer's storage devices and its memory. It acts as a crucial interface between storage hardware and the Operating System (OS), enabling efficient communication and data management operations. What is a Disk Controller A Disk Controller is a hardware component that manages the flow of data between a computer's storage devices (hard disk drives, SSDs) and the system memory. It translates high-level OS commands into low-level disk operations, controlling read/write operations and ensuring reliable data transfer. Disk Controller Architecture ...
Read MoreDisk Formatting
Disk formatting is the process of preparing a storage device, such as a hard drive or USB flash drive, for use by initializing its file system and creating a directory structure for storing files. This process allows the device to be recognized by the operating system and enables the storage and retrieval of data. Definition of Disk Formatting Disk formatting is like giving a blank slate to a storage device, preparing it to store new data by erasing any existing information and creating a structure for organizing files. It involves erasing any existing data, setting up a file ...
Read MoreDisk Operating System Commands
A Disk Operating System (DOS) is a type of operating system that manages data on disk storage devices. It was widely used in the 1980s and 1990s, particularly on IBM-compatible personal computers. Understanding DOS commands is essential for users working with legacy systems, troubleshooting older computers, or learning fundamental computing concepts. Definition of Disk Operating System (DOS) A Disk Operating System (DOS) is computer software that manages files and data stored on a computer's disk drive. It acts as a command-line interface between the user and the hardware, organizing and directing the flow of information. While DOS was ...
Read MoreDisk Scheduling and Management
Disk scheduling and management are essential components of an operating system that handle the organization and access of data on storage devices. Disk scheduling algorithms determine the order in which the read/write head moves to access data, directly impacting system performance. Meanwhile, disk management involves tasks such as partitioning, formatting, and file system creation to ensure optimal disk utilization and data integrity. Types of Disk Scheduling Algorithms Disk Scheduling Algorithm Categories Algorithms Order-Based ...
Read MoreDiskpart Command in Windows
Diskpart is a powerful command-line disk management utility in Windows that allows users to manage hard drives, partitions, and volumes directly from the command prompt. Available since Windows XP and present in all modern Windows versions, Diskpart provides advanced disk operations that go beyond the capabilities of the graphical Disk Management tool. What is Diskpart Diskpart is a text-based disk partitioning utility that operates through a command-line interface. Unlike graphical tools, Diskpart provides scriptable automation and access to advanced features such as partition table conversion, dynamic disk management, and low-level disk operations. It's particularly valuable for system administrators, ...
Read MoreDynamic Partitioning
Dynamic Partitioning is a memory management technique that allows the operating system to allocate and deallocate memory partitions of varying sizes during runtime. Unlike fixed partitioning where partition sizes are predetermined, dynamic partitioning creates and adjusts memory blocks based on actual process requirements, leading to more efficient memory utilization. How Dynamic Partitioning Works The operating system maintains a free memory list and allocates memory blocks that exactly match process requirements. When a process terminates, its memory is returned to the free list and can be merged with adjacent free blocks to prevent fragmentation. ...
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