Linked by Rahul on Sat 18th Oct 2008 11:29 UTC
Linux While Ext4 was originally merged in 2.6.19, it was marked as a development filesystem. It has been a long time coming but as planned, Ext4dev has been renamed to Ext4 in 2.6.28 to indicate its level of maturity and paving the way for production level deployments. Ext4 filesystem developer Ted Tso also endorsed Btrfs as a multi-vendor, next generation filesystem and along with the interest from Andrew Morton, Btrfs is planned to be merged before 2.6.29 is released. It will follow a similar development process to Ext4 and be initially marked as development only.
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fs-driver for windows
by FunkyELF on Mon 20th Oct 2008 13:38 UTC
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When I install a dual boot system I like to have a partition for storing data, music, pictures, movies etc...that can be accessible by both OS's. With the driver from I can use an ext2 or ext3 from within Windows. Will this work with ext4?

Reply Score: 3

RE: fs-driver for windows
by ba1l on Mon 20th Oct 2008 15:05 in reply to "fs-driver for windows"
ba1l Member since:

Probably not. That driver is actually for ext2 only.

The on-disk format for ext3 is basically compatible with ext2. All it really does is adds a journal, and other features like extended attributes. An ext3 driver can mount an ext2 volume, and an ext2 driver can mount an ext3 volume.

I believe there are filesystem options that would render an ext3 volume unreadable by an ext2 driver, but I'm not 100% sure. If there are, they're obviously turned off by default.

The same is basically true of ext4, with one exception. Extents, which are enabled by default, change the on-disk format and render it incompatible with ext2 and ext3 drivers. If you turned those off, you should be able to read an ext4 volume with an ext2 driver. I'm not sure I'd want to risk writing to an ext4 filesystem with an ext2 driver though.

Reply Parent Score: 2