| Feature | Stock 1.14 (New) | Stock 1.03 | | | :--- | :--- | :--- | :--- | | UHD Ripping | No | No (Blocked) | Yes (Full) | | MakeMKV LibreDrive | No (or partial) | Yes (With patch) | Yes (Native) | | Sleep Bug | Yes | Yes | No | | Read Speed (BD-100) | 2x (Throttled) | 4x | 6x-8x | | Downgrade Possible? | N/A | Yes (to 1.00) | N/A (Is target) |
: It fully enables LibreDrive, allowing the drive to read data directly from the disc without the hardware-level interference common in newer versions. bu40n 1.00 firmware
If your drive arrived with a higher version (like 1.04 or 1.05), you cannot simply "update" it; you must use a specialized flasher. | Feature | Stock 1
Cheaper alternative; identical hardware allows it to act like a BU40N. UHDTools (DVDFab) ⚠️ Critical Flashing Risks SDFtool Flasher - Page 61 - www.makemkv.com Cheaper alternative; identical hardware allows it to act
As LG updated the BU40N, they began implementing "encrypted" firmware. If your drive arrived with version 1.03 or higher, it likely became much harder to "flash" (re-write) the firmware back to the 1.00 state.