[CentOS] ext4?

From: James Bensley <jwbensley at gmail.com>

> I have a 5.5 box and I have formatted a partition as ext4  however I
> can't mount it, the mount command is telling me its an unknown  file
> system type. fsck tells me the partition is a clean ext4 partition  but
> I can't mount it.
> Some reasearch has lead me to believe the  problem is that ext4 isn't
> enabled in the kernel by default in 5.5 (this was  originally a 5.2 box
> that has been upgraded over time, its now on  2.6.18).

I guess you have e4fsprogs installed?
I saw some people use tune4fs -E /dev/sdxx before trying to mount...

JD