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| Developer(s) | Rémy Card |
|---|---|
| Full name | extended file system |
| Introduced | April 1992; 33 years ago (1992-04) withLinux 0.96c |
| Discontinued | 14 January 1997; 29 years ago (1997-01-14) with Linux 2.1.21 |
| Preceded by | MINIX file system |
| Succeeded by | ext2 |
| Structures | |
| Directory contents | Table |
| File allocation |
|
| Bad blocks | Table |
| Limits | |
| Max volume size | 2 GB[2] |
| Max filename length | 255 characters[3] |
| Features | |
| File system permissions | Unix permissions |
| Transparent encryption | No |
| Copy-on-write | No |
Theextended file system, orext, was implemented in April 1992 as the firstfile system created specifically for theLinux kernel. Although ext is not a specific file system name, it has been succeeded byext2,ext3, andext4. It hasmetadata structure inspired by traditionalUnix File System principles, and was designed byRémy Card to overcome certain limitations of theMINIX file system.[4][2] It was the first implementation that used thevirtual 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.[2]
ext was the first in the series of extended file systems. In 1993, it was superseded by bothext2 andXiafs, which competed for a time, but ext2 won because of its long-term viability: ext2 remedied issues with ext, such as the immutability ofinodes andfragmentation.[5]
There are other members in the extended file system family:
