.mw-parser-output .hidden-begin{box-sizing:border-box;width:100%;padding:5px;border:none;font-size:95%}.mw-parser-output .hidden-title{font-weight:bold;line-height:1.6;text-align:left}.mw-parser-output .hidden-content{text-align:left}This article may be expanded with text translated from the corresponding article in German. (March 2023) Click [show] for important translation instructions. View a machine-translated version of the German article. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Consider adding a topic to this template: there are already 9,443 articles in the main category, and specifying|topic= will aid in categorization. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing German Wikipedia article at [[:de:extended filesystem]]; see its history for attribution. You should also add the template ((Translated|de|extended filesystem)) to the talk page. For more guidance, see Wikipedia:Translation.
Full nameExtended file system
IntroducedApril 1992; 31 years ago (1992-04) with Linux
Directory contentsTable
File allocationlinked list (free space),[1] table (metadata)
Bad blocksTable
File system permissionsUnix permissions
Transparent encryptionNo

The extended file system, or ext, was implemented in April 1992 as the first file system created specifically for the Linux kernel. It has metadata structure inspired by traditional Unix filesystem principles, and was designed by Rémy Card to overcome certain limitations of the MINIX file system.[2][3] It was the first implementation that used the virtual file system (VFS), for which support was added in the Linux kernel in version 0.96c, and it could handle file systems up to 2 gigabytes (GB) in size.[3]

ext was the first in the series of extended file systems. In 1993, it was superseded by both ext2 and Xiafs, which competed for a time, but ext2 won because of its long-term viability: ext2 remedied issues with ext, such as the immutability of inodes and fragmentation.[4]

Other extended file systems

There are other members in the extended file system family:

See also


  1. ^ "Linux0.96c/include/linux/ext_fs.h". 1992. Retrieved 2020-06-10.
  2. ^ "Rémy Card (Interview, April 1998)". April Association. April 19, 1999. Archived from the original on February 4, 2012. Retrieved 2012-02-08. (In French)
  3. ^ a b Jones, M. Tim (February 17, 2009). "Anatomy of ext4". IBM Developer Works. Retrieved 2012-02-08.
  4. ^ Card, Rémy; Ts'o, Theodore; Tweedie, Stephen. "Design and Implementation of the Second Extended Filesystem". Archived from the original on 2012-02-04. Retrieved 2012-02-08. First published in First Dutch International Symposium on Linux. State University of Groningen. 1995. ISBN 90-367-0385-9.