fedora-list Digest, Vol 64, Issue 70

[Brian Hanks]

> You can see with
> $ mount
> as what format everything is mounted as. You can mount ext3 as ext4 but
> not the other way around. Of course, this doesn't help you determining
> what format the partition really has. To do that, you need to
> # tune2fs -l /dev/partition
> and look at the "Filesystem features".
>
> $ man tune2fs
> tells you that ext4-only features are ununit_bg and flex_bg. If you see
> these your partition is ext4, if not it can be mounted as ext3.
> -- Jussi Lehtola Fedora Project Contributor jussilehtola at fedoraproject.org

You can also use the blkid command which will give a more specific 
result.  It will state "ext3" or "ext4"

#blkid  /dev/partition


--Brian Hanks