# USB command compatibility final Release closeout

Date: 2026-07-30  
Status: passed  
Release S-record SHA-256:
`678BCC0BAEE940D27417DC889C296732281B7AD40F04EC952DB620D7BC6F40FD`

## Final drive retests

- `USB05_4G` passed WAV, PID-to-image continuous operation, full
  fresh-session verification, saved-image update/reboot, and independent Pi
  FAT/hash inspection on the compatibility path.
- `USB07_32G` passed the equivalent Controller B then Controller A sequence
  and independent Pi inspection on the compliant-cache path.
- Both specimens were left unmounted on the Pi. Qualification outputs were
  preserved as evidence; no `.tmp`, `.part`, or `.bak` file remained.

Detailed evidence:

- `work/evidence/usb05-final-release-qualification-20260730.md`
- `work/evidence/usb07-final-release-qualification-20260730.md`
- `work/evidence/usb08-command-compatibility-release-qualification-20260730.md`
- `work/evidence/usb04-compliant-sync-release-qualification-20260730.md`
- `work/evidence/usb-negative-fault-injection-release-matrix-20260730.md`

## Final controller identity

Full 4 MiB internal-flash captures after all final retesting match exactly:

| Controller | J-Link | SD raw CID | Bytes | Internal-flash SHA-256 |
|---|---:|---|---:|---|
| A | 69664082 | `035344535330384780976F0084018559` | 4,194,304 | `5DA4A19C10DAEEC6B812B314FF2D155F1ED044AE62F43B226CB13BB31060E932` |
| B | 69660123 | `035344535330384780976F0085018507` | 4,194,304 | `5DA4A19C10DAEEC6B812B314FF2D155F1ED044AE62F43B226CB13BB31060E932` |

Raw captures:

- `work/evidence/hpt-log-store-circular-mirror/controller-a/final-release-flash-identity-20260730/`
- `work/evidence/hpt-log-store-circular-mirror/controller-b/final-release-flash-identity-20260730/`

## Software gates

The executable USB transaction inventory reports no unclassified source drift.
The USB mass-storage workflow source/configuration check passes. Canonical
Debug and Release builds passed before deployment. The final Release artifact
was deployed B first and then A.

## Dispositions

- `USB06_1G` remains retired as controller-incompatible and was not retested.
- Compatibility is command/result based; this evidence is not an approved
  brand or model list.
- Final Release USB command compatibility qualification is complete.
