Re: ext4 features

[Tomasz Torcz]

On Mon, Jul 03, 2006 at 10:22:19PM +0200, Helge Hafting wrote:
> On Sat, Jul 01, 2006 at 08:17:02PM +0200, Tomasz Torcz wrote:
> > On Sat, Jul 01, 2006 at 07:47:16PM +0200, Thomas Glanzmann wrote:
> > > Hello,
> > > 
> > > > Checksums are not very useful for themselves. They are useful when we
> > > > have other copy of data (think raid mirroring) so data can be
> > > > reconstructed from working copy.
> > > 
> > > it would be possible to identify data corruption.
> > > 
> > 
> >   Yes, but what good is identification? We could only return I/O error.
> > Ability to fix corruption (like ZFS) is the real killer.
> 
> Isn't that what we have RAID-1/5/6 for?  

  ZFS was already called ,,blatant layering violation''. ;)
Yes,that what RAID is for. And if we want checksums in filesystem,
that's the best way to utilise them.

-- 
Tomasz Torcz                 Morality must always be based on practicality.
zdzichu@xxxxxxxxxxxxxxxxx                -- Baron Vladimir Harkonnen

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