Definition of file system File system
We found 4 definitions of file system from 3 different sources.
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What does file system mean?
WordNet
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| file system - a system of classifying into files (usually arranged alphabetically) | ||
| filing system | ||
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Wiktionary 
- file system (Noun)
A method of organizing blocks on a storage device into files and directories. - file system (Noun)
A set of blocks which are so organized.
Wikipedia 
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A File system (or filesystem) is a way of storing all data on a data storage device. The data is usually organized in computer files in directories. Below the file system there is usually a physical device where the files are stored. This might be a hard disk, USB flash drive, compact disc, or DVD. The file system might also talk to a remote server over a network where the file is stored. The file system might also only use RAM to store the files.
The underlying storage mechanism usually has no concept of a file. A hard disk knows of disk blocks, which are numbered in a certain way. These disk blocks contain binary data (usually: large numbers).
The file system does the "translation" between the large numbers, and the view the users see, that is that of files, organized in a certain way.
It then becomes possible to always keep the file system in a consistent state. With databases, this is known as ACID. That way, an operation on a file is either done, or it is not done. There are however, no states in between. The file being written to the filesystem is no longer visible. This is usually done using transactions. But with filesystems, it is called "journaling".
