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d2071430ea
Tier 2 rsync-mirrors each HDD app's recovery unit + appdata to a DIFFERENT physical disk (the only off-drive protection bind-mounted userdata can get; PBS can't reach it). Auto-enabled, auto-target: prefer another registered drive (different physical disk via system.SamePhysicalDevice), else the internal SSD for SMALL units only — with a size-aware headroom guard that REFUSES rather than fill the ~8G guest rootfs, recording an honest "needs 2nd HDD" status. Status persisted via the surviving CrossDriveBackup; "2. mentés" UI card now populated. Daily tier2-backup job + POST /api/backup/tier2. - backup/tier2.go (engine+selection+headroom), tier2_test.go (headroom arithmetic) - system.SamePhysicalDevice (linux Stat_t.Dev + stub) - handlers.go Tier2 UI population + tier2DestLabel; backups.html honest no-target reason - fixed stale TestBackupCopiesOnPath (old felhom-data layout -> in-guest layout) Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>