is there a way to tell that you have ext4 filesystem vs ext3

John5342 john5342 at googlemail.com
Sat Oct 4 14:48:05 UTC 2008


>In that case is there a way to convert the ext3 to ext4 whilst retaining
>all the pre-existing files?  If not then would the system be happy having
>ext4 / partition as well as co-existing ext3 /opt and /home partitions on
>a single system?
To the best of my knowledge ext3 can be converted to ext4 simply by mounting
ext3 as ext4 with only minor limitations (same can be done from ext2 to
ext3. Therefore formatting ext3 partitions to take advantage of ext4 should
not be necessary.

2008/10/4 Mike <mike.cloaked at gmail.com>

> Eric Sandeen <sandeen <at> redhat.com> writes:
>
> > Good question.  There's no consensus upstream to drop the "dev" from
> > "ext4dev" yet, so it may remain as a boot option for this release, yet.
> >
> > I think it may technically require a fedora "feature" change to to drop
> > the boot argument at this point, but I'm not certain...
> >
> > It certainly won't be switched in as the *default* for F10, though.
>
> Ultimately when id does become default I wonder what the situation will be
> if you install clean for F11+ and make the / partition default formatted
> to ext4, but there may be other pre-existing ext3 /opt or /home paritions
> that
> have lots of files on which should not be formatted....
>
> In that case is there a way to convert the ext3 to ext4 whilst retaining
> all the pre-existing files?  If not then would the system be happy having
> ext4 / partition as well as co-existing ext3 /opt and /home partitions on
> a single system?
>
>
>
>
>
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