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Date: Fri, 12 Feb 2016 19:28:46 -0800
From: Marc MERLIN <marc@merlins.org>
To: linux-btrfs@vger.kernel.org
Subject: Is there now a way to migrate FS without losing shared COW blocks between subvolumes?
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btrfs send lets you keep COW blocks within a subvolume.
But if I have lots of backups where subvolumes have shared data, and I need
to migrate this to a new filesystem, is there a decent way?

I know I can btrfs device add new drive as raid1, but I'm trying to migrate
off an old filesystem that likely wasn't created well. Is there a way to do
that?
I guess ideally I'd need btrfs send on a volume level, not subvolume level.

Thanks,
Marc
-- 
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
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