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Ext2

ext2, or second extended file system, is a file system for the Linux kernel. It was initially designed by French software developer Rémy Card as a replacement for the extended file system (ext). Having been designed according to the same principles as the Berkeley Fast File System from BSD, it was the first commercial-grade filesystem for Linux.

History, Overview & Compression extension

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Allowed filename characters
All bytes except NUL ('\0') and '/'
Bad blocks
Table
Date range
December 14, 1901 - January 18, 2038
Date resolution
1 s
Dates recorded
modification (mtime), attribute modification (ctime), access (atime)
Developer
Rémy Card

Topics to explore

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Overview

History

Ext2 data structures

File-system limits

Compression extension

Under other operating systems

Advanced semantic analysis

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Map overview Semantic statistics

Ext2

Nodes64
Edges63
Triples93
Avg. degree1.97
Density0.03125
Components1

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Ext2

Top relations

related to Further reading · 34
Ext2 → Annual Technical Conference, Ayers, Brown, Caching Under Linux, Charles, Cite, CiteSeerX, Cong, Dave, E2compr, Internal Layout, Jeremy, John, John's, June, Larry, Linux, Linux Ext2/Ext3 Filesystem, Linux Gazette, Modern File Compression Techniques
related to ext2 data structures · 7
Ext2 → Data, Each, The, There, These, This, Unix File System
related to File-system limits · 6
Ext2 → GiB, In Linux, Mostly, The, There, They
related to Under other operating systems · 5
Ext2 → Access, Filesystem, Installable File System, Microsoft Windows, Userspace
related to Compression extension · 4
Ext2 → Access, Directories, Linux, The
related to External links · 4
Ext2 → FreeOTFE, GPL, Windows, XP/2003/VISTA/2008
related to Allocating data · 3
Ext2 → However, If, When
related to Inodes · 3
Ext2 → Every, Example, The
Allowed filename characters · 1
Ext2 → All bytes except NUL ('\0') and '/'
Bad blocks · 1
Ext2 → Table

Important terminology Word statistics

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Important terminology

file linux system directory inode data blocks number kernel files block filesystem size extended compression new ext3 driver directories also

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Ext2Allowed filename charactersAll bytes except NUL ('\0') and '/'1.00infobox
Ext2Bad blocksTable1.00infobox
Ext2Date rangeDecember 14, 1901 - January 18, 20381.00infobox
Ext2Date resolution1 s1.00infobox
Ext2Dates recordedmodification (mtime), attribute modification (ctime), access (atime)1.00infobox
Ext2DeveloperRémy Card1.00infobox
Ext2Directory contentsTable1.00infobox
Ext2File allocationbitmap (free space), table (metadata)1.00infobox
Ext2File system permissionsUnix permissions, POSIX Access Control Lists (ACL)1.00infobox
Ext2Full nameSecond extended file system1.00infobox
Ext2IntroducedJanuary 1993 with Linux1.00infobox
Ext2Max file size16 GiB – 2 TiB1.00infobox
Ext2Max filename length255 bytes1.00infobox
Ext2Max no. of files10181.00infobox
Ext2Max volume size2–32 TiB1.00infobox
Ext2Partition IDsEBD0A0A2-B9E5-4433-87C0-68B6B72699C7 (GPT) 0x83 (Master Boot Record) Apple_UNIX_SVR2 (Apple Partition Map)1.00infobox
Ext2Preceded byextended file system1.00infobox
Ext2Succeeded byext31.00infobox
Ext2Supported operating systemsLinux, BSD, ReactOS, Windows (through an IFS), macOS (through FUSE), HelenOS, RIOT, Zephyr1.00infobox
Ext2Transparent compressionNo (Available through patches)1.00infobox
Ext2Transparent encryptionNo1.00infobox

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