Guide to Installing Vnish Firmware on BITMAIN Factory Firmware (Post-February 2024)

Overview

Starting from March 2024, Bitmain has restricted the installation of third-party firmware in their factory firmware. To install Vnish firmware, you must first downgrade the factory firmware to an earlier version.

For 21 series:
Download the Bitmain stock recovery image for 21 series (dated February 2024). After installation, use the VNISH TOOLKIT utility to install the Vnish firmware directly into the miner’s NAND without an SD card.

For 19/L7 series:

Download the SD recovery image corresponding to your miner model and control board type (Xilinx, Amlogic, BB, Cvitek) from our website. Once installed, you can flash the Vnish firmware using the VNISH TOOLKIT to install directly into the miner’s NAND without an SD card.

For L9 series:

It is important to flash stock firmware using recovery image, download unlock L9_recovery images for L9. Once installed, flash the Vnish firmware using the VNISH TOOLKIT directly into the miner’s NAND without an SD card.

Recovery Image Installation Guide

Use a USB flash drive or SD card (maximum 32GB) formatted to FAT32. For AMLOGIC control boards, a USB flash drive with an OTG adapter is recommended.
Extract the archive for your control board type to the root directory of the USB flash drive or SD card.
Insert the SD card or connect the OTG adapter with the USB flash drive to the powered-off miner.
Power on the miner and wait until the green LED on the front panel lights up and remains steady, indicating the firmware process has completed (typically under one minute).
Turn off the miner, remove the SD card or OTG adapter with the flash drive.
Power on the miner again. Once booted, use the VNISH TOOLKIT. Follow Step 11 instructions to manually select the miner model in the “Miner model” field. If the model is unavailable, choose “DETECT AUTOMATICALLY,” which will install the firmware for S19 XP. If needed, update to the specific Vnish firmware for your miner model and control board type via the web interface by downloading the web NAND update from the Vnish website.