Pavel's complaint is a consequence of this failure.
I note in passing that there is no need, in general, for a file system that journals data as well as metadata to write the data twice. That's just a feature of common, naive designs. Journaling data along with metadata, howsoever sophisticated, doesn't protect against power drops either. Nothing does. Use battery backup if you care. A few seconds is enough if you can shut down the host fast enough.
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