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v0.317.0: a second copy counts only on a proven different disk; the no-drive install speaks in words (felhom.eu architecture/16, build A)

Tier-2 and the one-copy notice ask the host agent (POST /disks/same-disk, agent 0.157.0): different +
proven -> made and counted; same disk -> not made (D1); unknown (VM, hidden USB serial) -> made, not
counted, the row says why (D2); a NAS never counts and no longer hides the notice (R-1075). An older
agent keeps the st_dev rule, logged once. D4: a data-folder or media app on a box with no drive is
refused in words with a link to the drives page (R-1068's raw-error half). MinAgent 0.157.0.

Claude-Session: https://claude.ai/code/session_012qRErfCoiTkvDK9N5XHbzb

2026-10-15 21:21:54 +02:00

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REPORT — v0.317.0: a second copy counts only on a proven different disk; the no-drive install speaks in words (2026-10-15)

Written in ASD-STE100 Simplified Technical English. Design read first: felhom.eu architecture/16-storage-physical-identity.md (§3, §4, §5 D4, §8, §10, §11), 07-backup-architecture.md §6, 09-update-architecture.md (MinAgent), 03-host-agent.md. Task: storage identity build A (operator rulings D1–D6, 2026-10-15). Agent counterpart: felhom-agent v0.157.0.

1. Baselines

Repo	`main` at start	at commit
felhom-controller	`9cc7ffcf3b` (brief) → `48d8674876` read	rebased onto `c6a5671` (v0.316.4)
felhom-agent	`d2053e7d47`	`52ed52c` (v0.157.0 released)

2. What changed

internal/backup/backup.go: diskRelation — the one „same disk?" decision; asks the agent through SetDiskJudge; an older agent or an unmapped path keeps the st_dev rule (logged once). offDriveCopyState / singleCopyWarning: the notice by 16 §4, skips a NAS (R-1075), i18n.
internal/backup/tier2.go, tier2_shares.go: target choice — same disk never; unknown made, marked Unproven; proven beats unknown; the guard re-asks right before the run. settings.CrossDriveBackup.Unproven records it; handlers.go + backups_apps.html show it.
internal/agentapi: FeatureSameDisk (MinAgent 0.157.0), Client.SameDisk, the identity fields on DiskInfo.
internal/stacks/deploy.go, deploy_errors.go, internal/api/router.go, deploy.html: D4 — ErrNeedsDrive, 400, code: needs_drive, the sentence and a link to the drives page.
cmd/controller/main.go: the judge wired. Locales: four new keys in both files; scripts/i18n_go_keys.json lists them.

3. Tests and red-proofs

Test	Red-proof (seen failing)
`TestDisk16_ProvenDifferent_CountedNoNotice`	— (positive control for the others)
`TestDisk16_SameDisk_NotMadeAndNoticeShown`	the same-disk refusal turned off → fails
`TestDisk16_Unknown_MadeNotCountedCannotCheck`	the unproven mark set false → fails
`TestDisk16_NetworkShare_NeverHidesTheNotice`	the NAS skip removed → fails (R-1075)
`TestDisk16_OldAgent_KeepsTheStDevRule`	fails with the same-disk refusal off
`TestDisk16_UnprovenCopyIsRecorded`	—
`TestD4_NoDriveRefusalSpeaksInWords`	the D4 branch off → fails with the OMV run's raw sentence
`TestD4_NeedsDriveIs400`, `TestD4_FilledPathKeepsItsOwnRefusal`	—
`TestDiskJudge_IsWiredAtStartup`	the judge made to never call the agent → fails

go test ./... green; controller_gates.py --fast green except observations (this section fixes it). Ten i18n parity pages refreshed with -update-i18n-golden after moving the old ones aside; the diff of each is ONLY the new lines (the stylesheet line kept as stored).

4. Live proof

Pending at this commit — the next REPORT revision carries it (Tester 1, demo-hp, the N100, a NAS on a scratch box).

11. Observations

FILED: R-1082 — the drives page offers /mnt/sys_drive for attaching (R-280, the reinstall-restore way out) while 16 §11 rejects it for household data, and the D4 sentence links to that page. Not changed here: source and design disagree, so it is reported.

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