GUIDE 01 · HARDWARE IDENTITY
Identify the control board
- Record the exact Antminer model from the device label or current UI.
- Locate the control-board platform; do not confuse it with a hashboard.
- Record AML/XIL/CV/BB and return to the exact-build finder.
Confirm S21 control-board identity with support if the board is unclear
GUIDE 02 · S21 / AML / NAND / 1.3.4
Install VNISH 1.3.4 on an S21
- Record the baseline and confirm Antminer S21 + Amlogic (AML).
- Download vnish-s21-aml-nand-v1.3.4.tar.gz.
- Verify SHA-256 5474fc4e3d97b0460cc95ca402752eb755199c38b1a61e3165e4d67550344b58.
- Follow only a tested NAND procedure for this board.
- Confirm first boot, pools, board/chip state, errors, temperature and fans.
- Keep recovery status visible before changing targets.
RECOVERY STATUS · Confirm the tested NAND recovery route for the exact board before installation
GUIDE 03 · GOVERNED CHANGE
Run a fleet pilot
- Capture a comparable baseline.
- Select a limited representative cohort.
- Define go, hold and rollback thresholds.
- Observe for an agreed window.
- Scale only the observed result, or return deliberately.
First boot and observation
Confirm build identity, pools, board/chip state, errors, hashrate, measured power, temperatures and fan/profile state. A universal observation window is not asserted.
Rollback and recovery
Stop → preserve evidence → select the exact recovery route → verify → recover → confirm. Board-specific route data remains unavailable.