My point was specifically to new things created during the period. Resilvering happens on addition of a replacement drive in ZFS. I am less sure that otherwise valid, complete checksum states of files made during the loss period get uplifted to the wider stripe count when that is done.
I say that because I have seen some stuff which suggests when you grow the FS with new VDEV in ZFS there are circumstances where the balance is not fixed and you can have persisting unbalanced IO state.
In distributed systems you don't need to be constrained to writing to a set of devices one of which is not available. You can just write anywhere, and remember where.
I say that because I have seen some stuff which suggests when you grow the FS with new VDEV in ZFS there are circumstances where the balance is not fixed and you can have persisting unbalanced IO state.