The 39Gi/node Longhorn data disks at 1:1 over-provisioning can't fit the media stack (plex 20Gi replica failed: 'insufficient storage'). Volumes are thin-provisioned config-only, so 200% lets the full catalog fit without a disk resize; physical fill risk is low. Also right-sized plex config (20Gi was excessive for metadata). Prod-grade path: grow the data disks (WS-STORAGE follow-up).
apps
Placeholder — populated in Phase 0. See ../home-network-k3s (read-only spec).