# REPORT — v0.157.0: every storage place knows its physical disk(s); POST /disks/same-disk (2026-10-15)

Written in ASD-STE100 Simplified Technical English. Design read first: felhom.eu `architecture/16-storage-physical-identity.md`
(§3, §4, §8, §10; ACCEPTED 2026-10-15, §13 = what was built), `03-host-agent.md`. Task: storage identity build A (operator
rulings D1–D6). Controller counterpart: felhom-controller v0.317.0 (MinAgent 0.157.0); hub v0.154.0 shows the fields.

## What changed

- `internal/storage/identity.go`: the physical disk(s) under a place, from `/sys`, `/run/udev/data`, `/proc/mounts` only
  (no block I/O). `proven`, or `unknown` with `vm` / `network` / `usb_bridge` / `weak_wwn` / `no_serial`.
- `GET /disks` rows and the hub report's `storage_targets` gain `kind`, `physical_disks`, `identity`, `identity_reason`.
- `POST /disks/same-disk` `{a, b}` → `{different, proven, reason, a, b}`; scoped like every `/disks` call; a path the agent
  did not mount itself is `unmapped`.
- `configs/` unchanged.

## Tests and red-proofs

Fixture `/sys` + udev trees for every spike case and five same-disk handler tests. Seen failing first: the LVM thin
„diamond" (tmeta/tdata under one pool) read as a failure — fixed by counting a seen node once. Broken on purpose and seen
failing: the VM rule, the vendor-less WWN rule, the own-mount rule (an absent drive), the `sys_drive` mapping.
`python3 scripts/agent_gates.py`: all OK.

## Release and delivery

- `scripts/release-agent.sh 0.157.0`: tag `v0.157.0`, sha256 `addd4041…0aef`, bundle `0604bc60…397a`.
- Delivered by signed `agent_update` jobs to Tester 1, demo-hp and the N100 (the three test boxes). **NOT VOUCHED** — the
  operator's act. Until the vouch, the global floor cannot declare MinAgent 0.157.0.

## Live proof (method: the agent's local API on each PVE host, with the guest's own token)

| Box | `GET /disks` | same-disk: drive vs system data |
|---|---|---|
| demo-hp | `local`/`local-lvm` proven (SATA SSD), NVMe drive proven (`eui:`), PBS `network` | different, proven |
| N100 | system proven (SATA SSD serial), USB drive proven (the bridge passes the real serial) | different, proven |
| Tester 1 (VM) | every place `unknown/vm` | not proven (`vm`) |

On all three: system data vs `/var/lib/docker` → same disk, proven; a drive name that is not mounted → `unmapped`. The hub
stored the same fields (read from its database with the WAL). Evidence: felhom.eu `audits/storage-identity-buildA-2026-10-15/`.

## Observations

1. FILED: R-1083 — scratch box 9202 has no `local_api` in its `bootstrap.json`, so it cannot use any agent call.
2. NOT-A-FINDING: `usb_bridge` is built from the design's rule and was not seen on a real enclosure; that is R-1077, already open.