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Bu40n 1.00 Firmware !exclusive! ⇒

The BU40N 1.00 firmware refers to a specific version of firmware designed for a particular device, likely a piece of networking or computing equipment, given the nomenclature. Firmware is essentially software that is embedded in a hardware device, controlling its functions and operations. The "BU40N" could refer to a model or series of devices, and "1.00" signifies the version number of the firmware.

Step-by-Step Guide: Downgrading to BU40N 1.00 Firmware

Disclaimer: Flashing optical drive firmware carries inherent risks. If you lose power or disconnect the USB cable during the flash, you will permanently destroy the drive. Proceed at your own risk.

Q: Can I use this firmware to play 4K discs in PowerDVD?

A: No. BU40N 1.00 firmware breaks official playback software. PowerDVD and CyberLink’s software check for the latest firmware and valid AACS certificates. If you flash to 1.00, you must use LibreDrive-enabled software (MakeMKV, VLC with libaacs, or Kodi) to play the disc directly. Most users rip the disc to MKV and then play the file via Plex or MPC-HC. bu40n 1.00 firmware

1. It Bypasses LibreDrive Host Revocation

MakeMKV, the most popular tool for backing up Blu-rays, features a technology called "LibreDrive." LibreDrive allows the software to take direct control of the optical drive, bypassing the traditional host authentication and region locking. However, newer firmwares (1.03, 1.04, and later) include host revocation lists that block MakeMKV’s ability to enable LibreDrive. BU40N 1.00 is the last firmware version released before these lockdowns were fully implemented. It offers full, unrestricted LibreDrive support out of the box.

Performance Expectations After Flashing

Once you successfully install BU40N 1.00 firmware, here is what you can expect: The BU40N 1

  • Ripping speed: 4x to 6x on a 100GB UHD disc. A full 4K movie (60GB) will take approximately 45 to 60 minutes.
  • Compatibility: Over 99% of 4K UHD discs (including Disney, Warner, Sony, and Lionsgate) will be readable. Notable exceptions: Some very new discs with bus encryption 2.1 may require MakeMKV updates, but the drive will handle them.
  • Noise: The BU40N is a slim drive; it is audible but not loud during 4x reads. It does not spin at the 12x speeds of full-size desktop drives.

The Magic of Version 1.00

Firmware 1.00 is the factory-shipped version. Crucially, it predates the "hardened" security patches that LG and Hitachi (HLDS) implemented to comply with the Blu-ray Disc Association's anti-ripping mandates.

3. It Allows Flashing to Other Drive Models (Cross-Flashing)

Here is where it gets interesting for power users. The BU40N 1.00 firmware can sometimes be flashed onto other similar drives, such as the BH16NS55, WH16NS60, or even the ASUS BW-16D1HT (after conversion). This is because HLDS uses a common chipset across many drives. Having a copy of the BU40N 1.00 binary is essential for "downgrading" newer, locked drives to a LibreDrive-friendly state. Ripping speed: 4x to 6x on a 100GB UHD disc

Community Verdict: The Gold Standard

After scanning thousands of posts on the MakeMKV forums, the consensus is clear: If you have a BU40N that can run 1.00, never update it.

Users praise the drive for its stability, speed, and low power consumption. It fits perfectly into external USB-powered enclosures, making it the ultimate portable ripping solution. Whether you are digitizing your 4K collection to Plex or Jellyfin, or simply backing up fragile discs, the combination of a BU40N and 1.00 firmware is a match made in heaven.

4. Important Warning (If You Are Trying to Flash)

Do not try to flash 1.00 on a drive that has newer firmware without following a specific downgrade procedure.

  • Direct downgrade fails (flash tool will block it).
  • Required method: Use the “SDFtool Flasher” (for Windows) or makemkvcon f (Linux/Mac) with the “encrypted firmware” option and a patched flasher.
  • Recommended target: Actually, many experts now prefer custom 1.02 or 1.00-modified (MK firmware) over factory 1.00 because it fixes the MAX_RATE read speed limit on old 1.00.