Ext2Fsd Project

Open source ext3/4 file system driver for Windows (2K/XP/WIN7/WIN8)

Ext2Fsd 0.61 was released !

with 3 comments

Features implemented or bugfix since V0.53:
    1, Ext4 extent writing support (developed by ngkaho1234 @ gmail.com)
       See his repository for more details:
    2, Size manipulation and i/o path revised for support of indirect and
       extent-based mappings
    3, 16T volume supported (tested and confirmed with 4T volume)
       Version 0.53 and previous versions only support up to 2T volume
       ticket: https://sourceforge.net/p/ext2fsd/bugs/134/
    4, Deletion acceleration: truncation optimized for indirect-based files
    5, Size-expanding disabled in IRP_MJ_CREATE for better performance.
       Windows sometimes would truncate file size back to 0
    6, Support Volume exclusive-open for e2fsprogs utils. Any attempts
       will be denied while EXT4 volume is being checked (e2fsck).
    7, FIXME:  Possible zero-content returned (requesting data from file tail)
    8, FIXME:  File ByteOffset updated for FO_SYNCHRONOUS_IO open (async i/o)
       ticket: https://sourceforge.net/p/ext2fsd/bugs/133/
    9, FIXME:  don't do byte or range round up for paging i/o requests
       ticket: https://sourceforge.net/p/ext2fsd/bugs/129/
   10, FIXME:  occasional block bitmap difference issue, cased by checksum
               caculation in uninit_bg group initializing
   11, e2fsprogs utils for Windows (e2fsck, mke2fs, tune2fs, debugfs) included
       [the followings are change-logs made upon V0.60]
   12, FIXME: Ext4 unwritten-extent supported to avoid possible data corruption
              MSB of ee_len field of unwritten extent is used as only a flag. It
              was mistakenly treated as extent length (block numbers) in V0.60
   13, FIXME: Manually clear file to zero for indirect-block file that is newly
              created but not yet written
   14, Renaming supported: with names only diffs in lower or upper cases
   15, I/o path revised to correctly handle ValidDataLength & unwritten holes

Supported Ext3/4 features by 0.61:
    1, flexible inode size: > 128 bytes, up to block size
    2, dir_index:    htree directory index
    3, filetype:     extra file mode in dentry
    4, large_file:   > 4G files supported
    5, sparse_super: super block backup in group descriptor
    6, uninit_bg:    fast fsck and group checksum
    7, extent:       full support with extending and shrinking.
    8, journal:      only support replay for internal journal
    9, flex_bg:      first flexible metadata group
Unsupported Ext3/4 features:
    1, journal: log-based operations, external journal
    2, EA (extended attributes), ACL support
    3, symlink creation
Features to be implemented in next release:
    1, Reparse point support (hardlink, symbolic link etc)
    2, mounted as given user: privilege checking with given uid & gid
Files descriptions:
Ext2Fsd-0.61.exe:       setup wizard for Windows systems (Win2k, Winxp,
                        Vista, Win7, Win8, Server 2003, Server 2008/R2)
Ext2Fsd-0.61.7z:        Batch setup package in 7-zip
Ext2Fsd-0.61.zip:       Batch setup package in zip
Ext2Fsd-0.61.src.7z:    Source codes of Ext3Fsd and Ext2Mgr in 7-zip
Ext2Fsd-0.61.src.zip:   Source codes of Ext3Fsd and Ext2Mgr in zip
Download link:
Files checksum:
C:\Works\Ext2fsd\0.61>sha1sum Ext2Fsd-0.61*
0f3d414fe46e47cd42d70cbfaa3954fd5b2820ea *Ext2Fsd-0.61.7z
3f3fee95c236dd91633fe38098bbc066876361bf *Ext2Fsd-0.61.exe
1ea722291760785bd214894e6e1367eb57e974fe *Ext2Fsd-0.61.src.7z
ae86a0816895406db5bf902eb74cc4be5ea2c2eb *Ext2Fsd-0.61.src.zip
161b69516ff0cfef700c6236a5d016e38eaf6228 *Ext2Fsd-0.61.zip
    The driver may crash your system and ruin your data unexpectedly,
    since there might be software conflicts and I could only test it
    on some of the popular platforms. You should use it with care and
    use it at your own risk!
Matt <mattwu@163.com>

Written by Matt

June 9th, 2015 at 1:06 am

Posted in Ext2Fsd,News

Tagged with

3 Responses to 'Ext2Fsd 0.61 was released !'

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  1. Great, thanks!


    9 Jun 15 at 11:34 am

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