Re: reiser4 disk formats (was http://www.namesys.com/snapshots/2004.08.09-internal.testing/)

[Vitaly Fertman <vitaly@namesys.com>]

On Monday 16 August 2004 03:27, Domenico Andreoli wrote:
> On Mon, Aug 16, 2004 at 01:13:38AM +0200, Francesco Biscani wrote:
> > Hi,
> >
> > On Monday 16 August 2004 00:55, Domenico Andreoli wrote:
> > > so the most safe catch-all command sequence should be simply
> > >
> > >   1. fsck.reiser4 device
> > >      - do also whatever fsck says is required to bring the fs
> > >        consistent. most probably it will say to use --build-sb and
> > >        then --fix.
> > >   2. debugfs.reiser4 -C device
> > >   3. fsck.reiser4 device
> > >      - do again whatever fsck says, most probably --fix is required.
> > >
> > > this should bring the fs from whatever disk format it is in to the
> > > latest one and this *should* happen without data loss. am i right?
> >
> > I may be wrong here, but as far as I remember reiser4progs 1.x give
> > errors if used on old disk formats. If you try to --fix these errors
> > _before_ changing format you may lose data. So the best sequence would
> > be:
> >
> > 1. fsck.reiser4 --fix device
> >      (with reiser4progs < 1.x)
> > 2. upgrade to reiser4progs 1.x
> > 3. debugfs.reiser4 -C device
> > 4. fsck.reiser4 --fix device
> >
> > This way you fix all real errors (possibly) present _before_ converting
> > the layout, and you avoid the (false) errors reported by reiser4progs 1.x
> > on old disk layouts. Can someone confirm?
>
> i'm talking about a message to be put in the reiser4progs 1.0.0 package.
> when the user reads the message she will not have any older version
> around. so this sequence dosen't suit my needs :(
>
> if you are right about fixing things before debugfs.reiser4 may loose
> data, then the right sequence is the one from Vitaly.
>
> what is confusing me is Vitaly saying:
>
> "The converter (debugfs.reiser4 -C) is supposed to be run on consistent
>  fs of course, so probably it is worth to check/fix it with the current
>  reiser4progs before any update."
>
> probably with "... any update." he meant also the update of the
> reiser4progs package to 1.0.0, doesn't him?

right, the current progs before update.

-- 
Thanks,
Vitaly Fertman