What (Windows, macOS, Linux) are you using?
Updating or downgrading firmware on the BU40N carries risks. The process uses a "flasher" utility (often DOS-based or Windows-based). If the process is interrupted—by a power failure or a system crash—the drive can be "bricked" (rendered unusable). Furthermore, flashing unofficial modded firmware voids warranties and can sometimes result in the drive refusing to read protected content like Cinavia-embedded Blu-rays if the protection mechanisms are tampered with.
Version 1.00 allows the drive to be used with "LibreDrive" technology. This provides direct access to the data on the disc without the drive's internal firmware interfering or "deciding" whether you’re allowed to read the data. bu40n 1.00 firmware
Enables direct access to the optical disc data without interference from the drive's internal firmware restrictions .
The standard GUI-based utility used to write firmware to these drives. What (Windows, macOS, Linux) are you using
Originally, UHD Blu-rays required specific "official" hardware and software chains (like Intel SGX) to play or rip. Firmware version 1.00 for the BU40N is a "friendly" firmware that allows the drive to read the data on UHD discs without these restrictive checks. Universal Compatibility
Prevents the drive from becoming "revoked" if it encounters a newer, malicious AACS key on a recently released disc. 4. How to Check Your Current BU40N Firmware If the process is interrupted—by a power failure
If you check your BU40N drive and realize it is already running a newer firmware (like 1.01 or 1.02), all hope is not lost. The enthusiast community developed a solution known as .
LibreDrive is a feature integrated into MakeMKV. When a drive has "LibreDrive enabled," the software takes direct control of the drive’s firmware, bypassing the host's operating system limitations. With firmware 1.00, the BU40N achieves "LibreDrive Friendly" status, allowing it to read the raw encrypted data from any 4K disc regardless of region or AACS version.
: The drive maintains a consistent maximum UHD read speed of
Yes, but with caveats. While newer drives like the LG WH16NS60 or Pioneer BDR-S13 exist, the BU40N remains the for UHD ripping. However, finding a drive that can accept 1.00 is getting harder.