Is there a way to enable the LUKS encryption format on a snapshot that was
created from an unencrypted image without losing data? I've seen in
https://docs.ceph.com/en/quincy/rbd/rbd-encryption/ that "Any data written to
the image prior to its format may become unreadable, though it may still occupy
storage resources." and observed that to be the case when running `encryption
format` on an image that already has data in it. However is there any way to
take a snapshot of an unencrypted image and enable encryption on the snapshot
(or even on a new image cloned from the snapshot?)
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