From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephane CHAZELAS <stephane_chazelas@yahoo.fr>
Subject: Re: how stable are snapshots at the block level?
Date: Tue, 25 Oct 2011 12:01:17 +0000 (UTC)
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2011-10-25, 07:46(-04), Edward Ned Harvey:
[...]
> My suggestion to the OP of this thread is to use rsync for now, wait for
> btrfs send, or switch to zfs.
[...]

rsync won't work if you've got snapshot volumes though (unless
you're prepared to have a backup copy thousands of times the
size of the original or have a framework in place to replicate
the snapshots on the backup copy as soon as they are created
(but before they're being written to)).

To backup a btrfs FS with snapshots, the only option seems to
be to copy the block devices for now (or the other trick
mentionned earlier).

-- 
Stephane