RE: XFS corruption during power-blackout

Al Boldi
2005-07-06T05:54:39Z

Sonny Rao wrote: {
> > > >On Wed, Jun 29, 2005 at 07:53:09AM +0300, Al Boldi wrote:
> > > >>What I found were 4 things in the dest dir:
> > > >>1. Missing Dirs,Files. That's OK.
> > > >>2. Files of size 0. That's acceptable.
> > > >>3. Corrupted Files. That's unacceptable.
> > > >>4. Corrupted Files with original fingerprint. That's ABSOLUTELY
> > > >>unacceptable.
> > > >
> > 2. Moral of the story is: What's ext3 doing the others aren't?
>
> Ext3 has stronger guaranties than basic filesystem consistency.
> I.e. in ordered mode, file data is always written before metadata, so
> the worst that could happen is a growing file's new data is written
> but the metadata isn't updated before a power failure... so the new
> writes wouldn't be seen afterwards.
>
I believe in newer 2.6 kernels that Reiser has ordered mode (IIRC, courtesy
of Chris Mason), but XFS and JFS do not support it.
}

Was ordered mode disabled/removed when XFS was add to the vanilla-kernel?