# v1.1.4 — A thermal and safety run that loads the box and watches the rails

## ✨ New features

**`4_Blanton_Script_thermal_safety.ttl`**
* A **standalone** script — it is not part of the A → B → C chain and is not started by any of them. Run it on its own when the question is thermal or safety rather than functional.
* Brings the DUT up the same way Script A does (login, session reset, fan speed, `wait_init`, DUT inventory, BMC, PCIe error clear, `pcie_bus`, PMON, dmesg), then loads it: `mlucas-avx2 -cpu 0:15` in the background and `blanton_tr518.sh start` on the data plane.
* Then loops every minute: platform data, **both switch boards' rail power** via `TH6_SWB0/1_power_readback.sh`, and `bgctl list` / `jobs`. That is the point of the script — power per rail under sustained full load, sampled over hours.
* **It has no teardown.** When you interrupt it the DUT is still in `port cd lb=mac`, `l2 learn off` and `test mode nr=yes`, and `mlucas-avx2` is still running. Run `blanton_tr518.sh stop` and `kill $(jobs -p)` before anything else uses the box — nothing in `show interfaces status` reveals the leftover state.
* **It cannot share a DUT with Script B.** Both take over the `cd` ports.

**Test flow diagram**
* `docs/Blanton_Test_Flow.drawio` draws all four scripts side by side, with the config flags that change each step marked, the one real `goto` in Script B drawn, and the manual handoffs between A → B → C shown as such.

## 🐛 Bug fixes

**The soak loop spent most of its minute reading margin**
* Script B's per-round loop is meant to be a quick sample. `margin_status_all.sh` walks nine LTC2980s over I2C and dominated the round. The scan moved to Script C, which takes it once before `show uptime`.
* **The trade-off is real and worth knowing**: margin is now only measured at the start (Script A) and the end (Script C). Drift that happens *during* the soak is no longer visible.

**`hw-test-session finish` ran from inside the session's own shell**
* Script C now sends `exit` and waits for `Script done` first, so `finish` runs in the login shell that opened the session.

**The new script arrived with LF line endings**
* Every other `.ttl` in the repo is CRLF, and `.gitattributes` marks `*.ttl` as `-text` — whatever is committed is exactly what Tera Term gets. Converted to CRLF to match.

## 📦 Downloads

| File | Contents |
|---|---|
| `Script_ABC_Blanton_V1.1.4.zip` | The full Tera Term working directory, including `Blanton_Script/` to copy onto the DUT |

**After copying to the DUT:**

```bash
chmod +x ~/Blanton_Script/*.sh      # see below
grep -rlU $'\r' ~/Blanton_Script    # expect no output
```

`blanton_ber.sh`, `nfc_polling.sh`, `blanton_tr518.sh` and the two `TH6_SWB*_power_readback.sh` are invoked through `./` or `~/`, so they need the execute bit along with `bmc_monitor.sh` and `usb_target.sh` — neither git nor a Windows/USB copy carries it reliably.

## ⚠️ Before you run

* **Script 4 leaves the switch loaded and looped back.** Always finish with `blanton_tr518.sh stop`. If the next test starts without it, traffic and BER results are meaningless and nothing warns you.
* **Do not run Script 4 and Script B on the same DUT.** Same ports, same L2 settings.
* **Margin is no longer sampled during the soak** — only Script A (start) and Script C (end).
* **Re-baseline your margin limits if you have not already**: `VNOM` became the measured median in v1.1.3, which moved both the deviation % and the margin window.
* **These three cannot share the switch**: `blanton_ber.sh`, `blanton_tr518.sh`, `blanton_traffic_linespeed`.
* **PRBS takes the links down** while `blanton_ber.sh` is armed.
* **`ce0` keeps circulating until you stop it.**
* **Two numbers must stay in step**: Script C's `sleep 30` and `blanton_ber.sh`'s `BER_INTERVAL`.
* **`FAN_SPEED` is 100** — relevant here more than anywhere: a thermal run at full fan is not the same test as one at 30%.
* **The three items listed as unverified in v1.1.0 are still unverified**: the `ce0` ingress mirror, the 120s settle in `blanton_tr518.sh`, and `test mode nr=no` on stop. The settle matters most for this release — Script 4 depends on `tr 518` still driving traffic minutes after it was started.

## 🔗 Links

* [Blanton_Test_Flow.drawio](https://etgit.et-wen.com/etwen/Blanton_TTL_Script/src/branch/main/docs/Blanton_Test_Flow.drawio) — the four scripts side by side
* [ARCHITECTURE.md](https://etgit.et-wen.com/etwen/Blanton_TTL_Script/src/branch/main/ARCHITECTURE.md) — test flow, data models, constraints
* [CLAUDE.md](https://etgit.et-wen.com/etwen/Blanton_TTL_Script/src/branch/main/CLAUDE.md) — commands and the bench gotchas

**Full changelog:** [V1.1.3...V1.1.4](https://etgit.et-wen.com/etwen/Blanton_TTL_Script/compare/V1.1.3...V1.1.4)