Convert ext3 to ext4

[Bob Gustafson]

On Mon, 2009-03-30 at 16:19 +0100, Bryn M. Reeves wrote:
> On Mon, 2009-03-30 at 10:11 -0500, Eric Sandeen wrote:
> > Bob Gustafson wrote:
> > > On Mon, 2009-03-30 at 09:12 -0500, Eric Sandeen wrote:
> > >> Bob Gustafson wrote:
> > >>> On Mon, 2009-03-30 at 08:55 -0500, Eric Sandeen wrote:
> > >>>
> > >>>> FWIW there is supposed to be an ext3->ext4 migration via anaconda if you
> > >>>> boot with "ext4migrate" on the cmdline.
> > >>> Hmm, by definition an 'update' - and failure is not an option - can't go
> > >>> back to FC10.
> > >>>
> > >>> Testing of this option on Anaconda would include having a FC10 whole
> > >>> disk image - to re-image disks for the next test.
> > >>>
> > >> Yep.  I guess I missed the FC10 part.
> > >>
> > > 
> > > Also, for testing RAID and ext4migrate, I think the testers will need a
> > > disk image for both RAID disks (assuming RAID 1). The data on both disks
> > > should be the same, but I think there are differences in the metadata
> > > between each disk in a pair.  Is this true?
> > 
> > The fs metadata on each leg of the mirror should be identical.
> 
> But depending on the RAID used the RAID metadata may not be. If you're
> preserving images of members for re-tests this will matter (though I'd
> have thought it would be easier to keep an image of the fs and restore
> that to the array each time you need to re-test).
> 

Sounds like a good idea. Using small disks would save time too..