Bu40n 100: Firmware Hot
If your computer no longer sees the drive, you may have experienced a partial flash. Ensure your external enclosure is getting sufficient wall power, swap the USB cable, and attempt to re-flash using the command-line version of the firmware tool ( makemkvcon ). 2. "Write POS Error"
Most modern Blu-ray drives are designed with . This is a security feature that prevents your computer from directly "seeing" the data on a 4K Ultra HD Blu-ray disc unless you are using specific, licensed (and often restrictive) playback software.
is a "UHD-friendly" drive, but factory updates often lock down the very features hobbyists need. Version 1.00 is prized for several key reasons:
—an ultra-slim internal Blu-ray drive manufactured by Hitachi-LG Data Storage (HLDS)—remains one of the most highly sought-after optical drives for data enthusiasts and home server curators. If you have been searching for , you are likely looking for the specific, unlocked 1.00 firmware version. This version enables LibreDrive capabilities and bypasses AACS 2.0 digital rights management (DRM) to back up 4K Ultra HD Blu-ray discs. bu40n 100 firmware hot
Disclaimer: Flashing firmware can potentially damage your drive. Proceed with caution and ensure you have the correct files.
The LG / Hitachi-LG Data Storage (HLDS) BU40N Go to product viewer dialog for this item.
The drive constantly re-tries to read a disc, produces a clicking noise, and ejects it. If your computer no longer sees the drive,
Persistent heat above 60°C (140°F) can warp the internal lens assembly, desolder ribbon cables, and permanently destroy the laser diode.
This guide assumes you have a Windows PC and a USB-to-SATA adapter (or an external enclosure that can put the drive into "flashing mode").
The original 1.00 firmware version contains a specific legal exploit. It allows compatible software to bypass standard optical drive restrictions without violating the encryption itself. "Write POS Error" Most modern Blu-ray drives are
Metadata & provenance
Since official channels won’t give you the 1.00 firmware, the enthusiast community has created tools to help. The MakeMKV SDF Tool
