Homelab Hero · No. 005: your result
Exactly right. The backup to the NAS means the worst case is a restore, not a loss. The health check on the survivor tells you whether it can take a resilver at all — same model, same purchase week, same wear clock. Then the swap and resilver happen while you watch, with a known-good copy sitting off the node.
The lesson: Backup first, survivor checked — then swap and watch the resilver.
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