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How can make a full copy of the contents of a btrfs filesystem? By full copy I mean not only the current data, but also different subvolumes with their snapshots, ideally preserving their CoW structures (i.e.: not duplicating blocks with the same content.

It seems a block-level copy (such as with dd) is not a good idea, since it duplicates the UUID, and there isn't a way to easily change it, apparently.

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2 Answers 2

There is a similar question on unix.stackexchange.com that points to partclone.btrfs, but I do not know any specifics about this.

There is also a discussion on the kernel mailing list, not really looking promising...

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With btrfs-send, which last I saw, was still experimental patches floating around on the btrfs mailing list.

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