It was included in version 2.6.19 of the Linux kernel which was released on November 29, 2006.
The ext4 filesystem is backward compatible with ext3, that is, it can be mounted as an ext3 partition (using â€œext3â€ as the filesystem type when mounting.) Similarly, mounting an ext3 filesystem as ext4 is also possible (using the â€œext4devâ€ filesystem type.) However, if the ext4 partition uses extents (one of the major new features of ext4,) backward compatibility and therefore, the ability to mount the filesystem as ext3 is lost.
By default, extents are not used; the â€œextentsâ€ option is explicitly required (e.g. mount /dev/sda1 /mnt/point -t ext4dev -o extents.)
Could we have a anaconda checkbox to enable this?
user_xattr Enables Extended User Attributes . Additionally, you
need to have extended attribute support enabled in the
kernel configuration (CONFIG_EXT4_FS_XATTR).
I would like it to have full functionallity from the install on..
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