Compare with vendor’s published hash. Corruption can cause unknown preflight requests.
Here is why:
Decoding the Ghost: What is “unknown request-firmware updater preflight-”? unknown request-firmware updater preflight-
sha256sum firmware.bin
Sometimes, unknown request-firmware updater preflight- is but a debug message. For instance: Compare with vendor’s published hash
Firmware updates are usually provided by the device manufacturer and can be applied using a variety of methods, including through the device itself, via a computer, or using specialized equipment. The process involves updating the firmware image on the device to a newer version, which can include fixes for known issues, improvements in performance, or new features. including through the device itself
: The digital signature of the update is valid and hasn't been tampered with.