[CentOS] tune2fs: Filesystem has unsupported feature(s) while trying to open

Fri Apr 22 03:02:55 UTC 2016
Chris Murphy <lists at colorremedies.com>

On Tue, Apr 19, 2016 at 10:51 AM, Matt Garman <matthew.garman at gmail.com> wrote:

># rpm -qf `which tune2fs`

That's in the CentOS 6.4 repo, I don't see a newer one through 6.7 but
I didn't do a thorough check, just with google site: filter.

> # cat /etc/redhat-release
> CentOS release 6.5 (Final)

> # uname -a
> Linux lnxutil8 2.6.32-504.12.2.el6.x86_64 #1 SMP Wed Mar 11 22:03:14
> UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

And that's a centosplus kernel in the 6.6 repo; while the regular
kernel for 6.7 is currently kernel-2.6.32-573.22.1.el6.src.rpm. So I'm
going to guess you'd have this problem even if you weren't using the
centosplus kernel.

I suggest you do a yum upgrade anyway, 6.7 is current, clean it up,
test it, and then while chances are it's still a problem, then it's
probably a legit bug worth filing. In the meantime you'll have to
upgrade your e2fsprogs yourself.

> I did a little web searching on this, most of the hits were for much
> older systems, where (for example) the e2fsprogs only supported up to
> ext3, but the user had an ext4 filesystem.  Obviously that's not the
> case here.  In other words, the filesystem was created with the
> mkfs.ext4 binary from the same e2fsprogs package as the tune2fs binary
> I'm trying to use.
> Anyone ever seen anything like this?

Well the date of the kernel doesn't tell the whole story, so you need
a secret decoder ring to figure out what's been backported into this
distro kernels. There's far far less backporting happening in user
space tools. So it's not difficult for them to get stale when the
kernel is providing new features. But I'd say the kernel has newer
features than the progs supports and the progs are too far behind.

And yes, this happens on the XFS list and the Btrfs list too where
people are using old progs with new kernels and it can be a problem.
Sometimes new progs and old kernels are a problem too but that's less

Chris Murphy