I understand the detail behavior, thanks.
My concerns are:
How to recover backfill_unfound state if this behavior is modified to be detected as
backfill_unfound again even if in the above case . Whether deep scrub can be executed in
the backfill_unfound state and recover this situation. If that doesn't work, I'm
wondering how to address situation.
Anyway, I'd like to know this is expected behavior or not, and how to fix it if this
is not expected behavior.