Mailinglist Archive: opensuse-kernel (89 mails)

[Jan Kara <jack@xxxxxxx>]

On Fri 08-04-11 13:15:54, doiggl@xxxxxxxxxxxxxxxxxx wrote:
> On Thu, 7 Apr 2011 20:57:12 +0200, Jan Kara <jack@xxxxxxx> wrote:
> > Hello,
> >
> >   we are figuring out upstream how to eventually get rid of maintaing
> three
> > code bases of ext2, ext3, and ext4 in parallel. These days ext4 kernel
> > driver is able to handle both ext2 and ext3 filesystems in a backward
> > compatible manner - i.e., you can mount, access, modify the filesystem
> with
> > ext4 driver and then still be able to use it with the old ext2 driver.
> > So I'd think that we could try changing config of our kernel in Factory
> > so that ext4 driver is used for ext2 filesystem and see whether
> something
> > breaks or not.
> >
> > Do people have any opinion on this?
> >
> >                                                                     Honza
> > -- 
> > Jan Kara <jack@xxxxxxx>
> > SUSE Labs, CR
>
> Some thoughts on this
> If filesystem is not in use e.g overnight /out of business hours
> - tar existing files up to somewhere else provided there is enough free
> target space
> - Reformat {ext2, ext3}partition to ext4
> - Restore files to the reformatted partition
> - do the smaller partitions first [df -h] will get the sizes of partitions
> - unsure if dir/file permissions are preserved though.
> - Prehaps use cron to assist to do the job 
  Yeah, sure you can migrate the filesystem this way and I think it might
be desirable for most users (possibly then run ext4 in nojournal mode) but
I understand some people might wish to stay with ext2 for legacy reasons.

                                                                        Honza
-- 
Jan Kara <jack@xxxxxxx>
SUSE Labs, CR
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