Ext2 File System Driver for Windows V0.61 was released.

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Release Notes for Ext2Fsd V0.61
==================================

Features implemented or bugfix since V0.53:

1, Ext4 extent writing support (developed by ngkaho1234 @ gmail.com).
   See his repository for more details:
   http://github.com/ngkaho1234/Ext3Fsd.git
2, Size manipulation and i/o path revised for support of both indirect and
   extent-based mappings
3, 16T volume supported (tested with 4T volume / 4K block-size)
   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,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
12,FIXME: Manually clear file to zero for indirect-block file that is newly
          created but not yet written
13,Renaming supported: with names only diffs in lower or upper cases
14,I/o path revised to correctly handle ValidDataLength & unwritten holes
15,e2fsprogs utils for Windows (e2fsck, mke2fs, tune2fs, debugfs) included

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

WARNINGS:

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
http://www.ext2fsd.com