40 lines
1.8 KiB
Markdown
40 lines
1.8 KiB
Markdown
# clar200-unlock
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> Unlock EMC CLAR200-locked Exos X18 SAS drives via the Seagate F3 terminal, using an ESP32-C3 bridge.
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## Start Here
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**Read the latest handoff first:** `.claude/handoffs/` (most recent file).
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Then `PROCEDURE.md` (the runbook), `IDEA.md` (brief), `DECISIONS.md` (settled choices).
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Background on why host-side tools fail: `~/bin/EMC_CLAR200_DRIVE_FIX_NOTES.md`.
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## Project Identity
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Two Seagate Exos X18 SAS drives (ST16000NM004J, EMC fw ES2264 — SN ZRS015V7,
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ZR511KWK) are locked in the "SS160520 CLAR200" state: SCSI INQUIRY/VPD work, but
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every other command (incl. READ CAPACITY) returns Hardware Error. No host tool
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can format them. This project drives the drives' out-of-band **F3 service UART**
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(via an ESP32-C3 as a 3.3 V USB-serial bridge) to reformat them to 512-byte
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sectors and reclaim them as 14.6 TB+ spares for the `tank` pool.
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## Current State
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- **Phase:** building → first hardware attempt pending
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- **Repo:** https://git.sethpc.xyz/Seth/clar200-unlock
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- **Hardware:** ESP32-C3 on steel141 `/dev/ttyACM0` (MAC 58:8c:81:ac:f0:4c).
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Drive ZRS015V7 in a pve173 JBOD (must be benched for F3 work).
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- **Done:** firmware (`firmware/clar200_bridge.ino`) + flash script + full
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procedure written.
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- **Next:** `./firmware/flash.sh`, sanity-test bridge, bench drive, find F3
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pinout, get `F3 T>`, format to 512.
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## Conventions
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- **Safety:** bench-only F3 work — NEVER in the pve173 JBOD next to live tank.
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3.3 V only; share TX/RX/GND, never power. `screen -L` to log every session.
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Escalation brake applies: silent terminal → re-check wiring/baud, never a more
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aggressive format command.
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- **F3 honesty:** Exos X18 dialect ≠ 7200.11. Map commands with `?` before
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firing; record discovered tokens in `docs/f3-command-reference.md`.
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- Conventional commits; commit + `gitea push` each meaningful change.
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