Bu40n 100 Firmware Hot !!top!!

Firmware version 1.00 is considered the "holy grail" for the LG BU40N (and rebadged versions like Archgon or Verbatim slim drives).

The BU40N is an ultra-slim laptop-style drive. Because it lacks a dedicated internal fan and has a small physical footprint, it generates significant heat during the 45–90 minute process of ripping a 4K disc. bu40n 100 firmware hot

High temperatures can expand internal components slightly, leading to "ScSI Error" or "Read Offset" failures mid-rip. Firmware version 1

If your drive came with a newer, restricted firmware (like 1.04 or 1.05), you may need to "downgrade" it to regain UHD capabilities. Ultimate UHD Drives Flashing Guide Updated 2021 :

Never cross-flash a BU40N with firmware from a desktop drive (like the WH16NS60), as this will permanently brick the slim drive. Ultimate UHD Drives Flashing Guide Updated 2021 : r/makemkv

Version 1.00 is a "UHD-friendly" firmware that allows software like MakeMKV to bypass AACS 2.0/2.1 protection on 4K Blu-rays.

Excessive heat can lead to thermal throttling , causing the drive to slow down from 6x to 2x or even stall completely.