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Original author(s) Matt Wu
Developer(s) Matt Wu
Initial release January 26, 2002; 16 years ago (2002-01-26)
Stable release
0.69 [1] / November 2, 2017; 3 months ago (2017-11-02)
Development status active
Written in C[2]
Operating system Microsoft Windows
Available in English, Simplified Chinese
Type Installable File System
License GNU GPL v2
Website www.ext2fsd.com

Ext2Fsd (short for Ext2 File System Driver) is a free Installable File System driver written in C for the Microsoft Windows operating system family. It facilitates read and write access to the ext2, ext3 and ext4 file systems.

The driver can be installed on Windows 2000, Windows XP, Windows Server 2003, Windows Vista, Windows 7, Windows 8,[3] Windows 10, Windows Server 2008, Windows Server 2008 R2.[1] Support for Windows NT was dropped in version 0.30.[4]

The program Ext2Mgr can optionally be installed additionally to manage drive letters and such.


Feature matrix[edit]

Read Write Journal dir_index
ext2 Yes Yes N/A N/A
ext3 Yes Yes Limited Yes
ext4 Yes Yes Limited Yes

Supported Ext3/4 features[1][edit]

  • flexible inode size: > 128 bytes, up to block size
  • dir_index: htree directory index
  • filetype: extra file mode in dentry
  • large_file: > 4G files supported
  • sparse_super: super block backup in group descriptor
  • uninit_bg: fast fsck and group checksum
  • extent: full support with extending and shrinking.
  • journal: only support replay for internal journal
  • flex_bg: first flexible metadata group
  • symlink and hardlink
  • Mount-as-user: specified uid/gid supported

Unsupported Ext3/4 features[edit]

Features to be implemented in future[edit]

  • Extents management improvement
  • EA and ACL security checking

See also[edit]


External links[edit]