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The file system uses an index table stored on the device to identify chains of data storage areas associated with a file, the File Allocation Table (FAT). The FAT is statically allocated at the time of formatting. The table is a linked list of entries for each cluster, a contiguous area of disk storage. Each entry contains either the number of ...
File Allocation Table #2 ... (optional) Root Directory Region (number of root entries * 32) / (bytes per sector) Root Directory (FAT12 and FAT16 only) This is a Directory Table that stores information about the files and directories located in the root directory. It is only used with FAT12 and FAT16, and imposes on the root directory a fixed ...
A local file system is a capability of an operating system that services the applications running on the same computer. [1][2] A distributed file system is a protocol that provides file access between networked computers. A file system provides a data storage service that allows applications to share mass storage.
Extent (file systems) In computing, an extent is a contiguous area of storage reserved for a file in a file system, represented as a range of block numbers, or tracks on count key data devices. A file can consist of zero or more extents; one file fragment requires one extent. The direct benefit is in storing each range compactly as two numbers ...
In NTFS, all file, directory and metafile data—file name, creation date, access permissions (by the use of access control lists), and size—are stored as metadata in the Master File Table (MFT). This abstract approach allowed easy addition of file system features during Windows NT's development—an example is the addition of fields for ...
MS-DOS, for example, used a simple File Allocation Table (FAT). The FAT has an entry for each disk block, [note 1] and that entry identifies whether its block is used by a file and if so, which block (if any) is the next disk block of the same file. So, the allocation of each file is represented as a linked list in the table.
exFAT (Extensible File Allocation Table) is a file system introduced by Microsoft in 2006 and optimized for flash memory such as USB flash drives and SD cards. [7] exFAT was proprietary until 28 August 2019, when Microsoft published its specification. [8] Microsoft owns patents on several elements of its design.
Data orientation refers to how tabular data is represented in a linear memory model such as in-disk or in-memory.The two most common representations are column-oriented (columnar format) and row-oriented (row format). [1][2] The choice of data orientation is a trade-off and a architectural decision in databases, query engines, and numerical ...