Btrfs devel - Sep 2011 - Re: Any chance to recovery btrfs raid-0 after accidental format of one volume?

Bad case of user error here but I managed to reformat one half of a
btrfs volume that was set up with metadata raid-1 and data raid-0.

I can mount the remaining half degraded, and can see all of the files,
but half their content is missing.

I’m just wondering whether, since all the metadata is intact, and
since (most of) the data on the partition that I reformatted has not
actually been over-written, whether it is conceivable that I can
recover most of my files by somehow reincorporating the second volume
into the array?

The important stuff is all backed up (I hope) so this is more of
academic interest...
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> > Bad case of user error here but I managed to reformat one half of a
> > btrfs volume that was set up with metadata raid-1 and data raid-0.
> It won''t help you - but did you format it with mkfs.btrfs, while
it was mounted?
No I formatted as ext4 while off-line.

Thanks for the feedback.

I guess I just kiss the files goodbye and move on.
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On Wed, Sep 07, 2011 at 09:00:21AM +1000, Dante wrote:
> > > Bad case of user error here but I managed to reformat one half of
a
> > > btrfs volume that was set up with metadata raid-1 and data
raid-0.
> 
> > It won''t help you - but did you format it with mkfs.btrfs,
while it was mounted?
> 
> No I formatted as ext4 while off-line.
> 
> Thanks for the feedback.
> 
> I guess I just kiss the files goodbye and move on.
   In this instance, it''s almost certainly going to be faster to
recover from your backups than it is to attempt to reconstruct the few
files that you can from the bits that aren''t missing.

   Hugo.

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