Ext2 File System Driver for Windows News
A Linux ext2/ext3 file system driver for Windows
Brought to you by:
matt_wu
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Release Notes for Ext2Fsd V0.61
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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!