Mounting ext4-filesystem with newer Kernels
Trying to mount my ext4 partiton with a 2.6.25 kernel i get this errormessage:
EXT4-fs: hda3: not marked OK to use with test code.
There is a new special flag you have to set to mount development code, so do:
[root]# debugfs -w /dev/hda3
debugfs 1.40.9 (27-Apr-2008)
debugfs: set_super_value s_flags 4
debugfs: quit
More info here.





on the new stable ext4 (kernel 2.6.28), regular util-linux (even the new one) didn’t work for me, for anyone who needs help mounting ext4 use: http://userweb.kernel.org/~kzak/util-linux-ng/