File System - Introduction to Operating Systems
Subject and UNIT: Introduction to Operating Systems: Unit IV(b): File System
The primary issue of file implementing file storage is how to keep track of file blocks. File consists of a collection of blocks.
File System - Introduction to Operating Systems
Subject and UNIT: Introduction to Operating Systems: Unit IV(b): File System
Directory is implemented by using linear list and hash table. Linear list is simple method of directory implementation.
File System - Introduction to Operating Systems
Subject and UNIT: Introduction to Operating Systems: Unit IV(b): File System
File system is implemented on disk and memory. How to implement the file system, it varies according to operating system and file system. But all the operating system follow some general rules.
File System - Introduction to Operating Systems
Subject and UNIT: Introduction to Operating Systems: Unit IV(b): File System
File system is mounted and maintain by the secondary storage which provides by disk. Characteristics of disk are as follows: 1. Same place is used for reading, writing and modification. 2. User can access disk directly for any block of information.
File System - Introduction to Operating Systems
Subject and UNIT: Introduction to Operating Systems: Unit IV(b): File System
User information and data is stored in the secondary storage. It is necessary to provide security from physical damage and improper access.
File System - Introduction to Operating Systems
Subject and UNIT: Introduction to Operating Systems: Unit IV(b): File System
Multiprogramming and multitasking operating system support the multiple user. These users perform various operations on the files. Files are shared between numbers of users.
File System - Introduction to Operating Systems
Subject and UNIT: Introduction to Operating Systems: Unit IV(b): File System
Files contained in a file system can be accessed only when the file system is mounted. Each device consists of its own local file system.
File System - Introduction to Operating Systems
Subject and UNIT: Introduction to Operating Systems: Unit IV(b): File System
User stores file in file system using directory. File system stores files of many users. Files are stored on the secondary storage device like hard disk, optical disk and memory disk. These device support random access method.
File System - Introduction to Operating Systems
Subject and UNIT: Introduction to Operating Systems: Unit IV(b): File System
Information and data is kept in files. Files are stored on the secondary storage device. When this information is to be used, it has to be accessed and brought into primary main memory.
File System - Introduction to Operating Systems
Subject and UNIT: Introduction to Operating Systems: Unit IV(b): File System
Files are the building blocks of any operating system. Permanent storage of information and data is a file. File provides an easy means of information sharing. The operating system is not interested in the information stored in the files.
Storage Management - Introduction to Operating Systems
Subject and UNIT: Introduction to Operating Systems: Unit IV(a): Storage Management
Latency time: It is the time spent waiting for the target sector to appear under the read and write head.
Storage Management - Introduction to Operating Systems
Subject and UNIT: Introduction to Operating Systems: Unit IV(a): Storage Management
Kernel I/O subsystem provides various services like scheduling, buffering, caching, spooling, device reservation and error handling.