Convert ext3 to ext4

[Eric Sandeen]

Bruno Wolff III wrote:
> On Sun, Mar 29, 2009 at 20:26:56 -0300,
>   Mario Chacon <the.masch at gmail.com> wrote:
>> Hello:
>> I'm using fedora 11 for some days with ext3, now I want to try with ext4. Is
>> it possible to convert all my ext3 partition to ext4?
> 
> Yes.
> http://kernelnewbies.org/Ext4#head-3891522e0601162aab24c73c1f148a1e28c6a9d4
> 

although note the caveats there.  Existing files will not change their
disk format to use extents... so it's not quite the same as if you had
just done ext4 from scratch.  Still worth testing, though, and should
still be beneficial.

-Eric