CSCI 22022: File Systems - Part II

Less efficient due to different block sizes

Random access is easy

Table must be in memory all the time and not suitable for large disks

<p>AKA File Control Block, lists the attributes and disk addresses of the file’s blocks</p> Signup and view all the answers

<p>Less memory required and only in memory if the relevant file is open</p> Signup and view all the answers

<p>Reserve last disk address to Disk block containing additional disk addresses</p> Signup and view all the answers

<p>To point to a new inode which contains the metadata for the file</p> Signup and view all the answers

<p>$ echo 'Hello, World!' &gt; myfile.txt</p> Signup and view all the answers

<p>Contiguous Allocation</p> Signup and view all the answers

<p>High read performances, only seeking the first block is needed</p> Signup and view all the answers

<p>Disk fragmentation</p> Signup and view all the answers

<p>Each block is a pointer to the next block in the file</p> Signup and view all the answers

<p>Random access is slow, as n-1 blocks need to be read to find the n-th block</p> Signup and view all the answers

<p>It leads to disk fragmentation, making it difficult to allocate large contiguous blocks of space</p> Signup and view all the answers

<p>Every block can be used, and files can be allocated non-contiguous blocks</p> Signup and view all the answers

<p>Contiguous allocation stores files in contiguous blocks, while linked-list allocation stores files in non-contiguous blocks</p> Signup and view all the answers

<p>By using the command <code>$ ln myfile.txt my-hard-link</code></p> Signup and view all the answers

<p>It splits the disk into clusters with unique id numbers and uses a table to track what part of what was stored in each cluster.</p> Signup and view all the answers

<p>Limited support for access control and file permissions, limited support for long file names, and fragmentation issues.</p> Signup and view all the answers

<p>The maximum file size is 4 GB and the partition size cannot exceed 8 TB.</p> Signup and view all the answers

<p>NTFS is a journaling file system used in modern Windows operating systems, supporting access control lists (ACLs) and control over file and folder permissions.</p> Signup and view all the answers

<p>Journaling keeps track of changes not yet committed to the file system.</p> Signup and view all the answers

<p>ACLs are used to control access to files and folders, allowing administrators to assign permissions to individual users or groups.</p> Signup and view all the answers

<p>NTFS provides improved security, flexibility, and features compared to FAT32.</p> Signup and view all the answers

<p>To recover file system consistency in the event of a system failure or power loss</p> Signup and view all the answers

<p>256 TB</p> Signup and view all the answers

<p>High-performance and scalability</p> Signup and view all the answers

<p>Performance and scalability</p> Signup and view all the answers

<p>Enhanced performance and strong encryption</p> Signup and view all the answers

<p>Minimized duplication of code</p> Signup and view all the answers

<p>Extents replace the traditional block mapping scheme</p> Signup and view all the answers

<p>Data protection</p> Signup and view all the answers

<p>The main components of a file system are Application Programs, Logical File System, File-Organization Module, Basic File System, I/O Control, and Devices. These components interact with each other to manage files, directories, and storage devices, providing a layered architecture for file system management.</p> Signup and view all the answers

<p>The primary function of the Logical File System layer is to manage metadata, such as file names, sizes, and permissions, and to maintain the file structure using file-control blocks (i-nodes).</p> Signup and view all the answers

<p>The File-Organization Module is responsible for managing files and their logical blocks, and includes a free space manager that tracks unallocated blocks and provides them to the file-organization module when requested.</p> Signup and view all the answers

<p>The Basic File System layer issues generic commands to the appropriate device driver to read and write blocks on the storage device, and manages the memory buffers and caches that hold various file system, directory, and data blocks.</p> Signup and view all the answers

<p>The I/O Control layer consists of device drivers and interrupt handlers that transfer information between the main memory and the disk system, and manipulate the physical device to read and write data.</p> Signup and view all the answers

<p>A file system is a layer of software that manages files and data on a storage device, while a storage device is the physical mechanism that stores the data, such as a hard drive or solid-state drive.</p> Signup and view all the answers

<p>The Application Programs layer consists of the day-to-day programs that are run by the user, such as web browsers and text editors, and provides a interface to the file system for the user.</p> Signup and view all the answers

<p>The file system manages the allocation of disk space to files through the File-Organization Module, which tracks unallocated blocks and provides them to the file-organization module when requested, and the Logical File System layer, which manages metadata and maintains the file structure.</p> Signup and view all the answers