Re: Will "btrfs check --repair" fix the mounting problem?

[Christoph Anton Mitterer <calestyo@scientia.net>]

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On Sat, 2015-12-12 at 13:16 -0700, Chris Murphy wrote:
> > What is the better way to get data? send/receive works only with RO
> > snapshots. Is there another way to preserve subvolumes and CoW
> > structure (a lot of files was copied between subvols using "cp
> > --reflink=always")? Or just rsync'ing files is all what I can do?
> 
> cp -a or rsync -a is all I can think of. To start to get it back to
> normal, you can use duperemove. While that doesn't create subvolumes,
> it'll at least find duplicate extents and use reflinks for those. So
> it's in effect the same thing you have now, just lacking the
> subvolume
> structure.

If he can still write to the fs, he could just create a ro-snapshot of
the rw ones?
Of course if the fs is already damaged, that may cause even more
damage... so this should only be made on a clone of the fs.

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