# Ticket: Preserve Controller A failed-SD recovery evidence

Status: complete; compact evidence preserved and raw-image duplication explicitly declined
Type: ticket
Updated: 2026-07-25
Next Action: none; retain work/evidence/controller-a-failed-sd-compact-preservation-20260725.md
Campaign Reason: Historical record from campaign 011-qualify-degraded-sd-operation-and-logging-integrity; retained independently after campaign closure and requires no separate owner-queue execution.
Campaign: standalone
Parent: work/incidents/incident-control-a-sd-card-read-failure-20260722.md
Project Map: work/maps/map-smi-firmware-stabilization-and-qualification.md

## Problem

The July 22 recovery image, map, recovered files, hashes, and carved records are
reported under `/var/tmp` on `srv-rpi00.local`. That location is not durable
project evidence and may be cleaned without warning.

## Known source set

- `/var/tmp/smi-control-a-failed-sd-20260722.img`
- `/var/tmp/smi-control-a-failed-sd-20260722.map`
- associated recovered files, hashes, and carved-record outputs with the same
  incident prefix

## Acceptance criteria

- [x] Destination and retention owner are explicitly selected.
- [x] Source files are inventoried read-only before copy.
- [x] Large images remain outside Git; the repository stores a manifest,
  cryptographic hashes, capture method, source/destination, and access route.
- [x] Source and destination hashes match.
- [x] The incident links the durable manifest.
- [x] No format, repair, or additional mutation of the failed card is performed.

## Closeout

The retained compact archive and verification record are documented in
`work/evidence/controller-a-failed-sd-compact-preservation-20260725.md`.
The owner explicitly declined duplicating the 7.95 GB raw recovery image
because its incremental value did not justify the storage cost. The recovery
map, recovered files and hashes, carved outputs, and transfer log were retained
in a 19.56 MB archive with matching source and destination SHA-256 hashes.
