Bu40n 1.00 Firmware Patched (iOS)

The BU40N 1.00 firmware is widely considered the "gold standard" for enthusiasts looking to back up 4K Ultra HD (UHD) Blu-ray discs. It is the primary choice for "cross-flashing" various LG and ASUS slim drives to enable LibreDrive features.  💿 Why BU40N 1.00 is Highly Valued 

This specific firmware version is prized because it bypasses several hardware restrictions that manufacturers typically use to block 4K ripping: 

UHD Friendly: Unlike later official versions, 1.00 allows the drive to read the data on 4K discs without requiring Intel SGX or specific certified hardware.

LibreDrive Support: It enables MakeMKV's "LibreDrive" mode, which provides direct access to the disc data, bypassing the drive's internal revocation lists and region coding.

Broad Compatibility: While other firmwares (like BP60NB10) may only work with MakeMKV, the BU40N 1.00 firmware is compatible with nearly all popular ripping software, including DVDFab and AnyDVD.

Optimal Read Speeds: It maintains a steady 6x read speed for UHD discs, which is the peak performance for most slim drives.  🛠️ Common Hardware for Flashing 

Because the LG BU40N is a slim internal drive, users often flash its 1.00 firmware onto more affordable or accessible external drives. This process is known as cross-flashing.  Base Drive Model  Why it's Flashed Flashing Tool Used LG WP50NB40

Popular external drive; flashing to BU40N 1.00 unlocks 4K reading. SDFtool Flasher LG BP50NB40

Cheaper alternative; identical hardware allows it to act like a BU40N. UHDTools (DVDFab) ⚠️ Critical Flashing Risks  SDFtool Flasher - Page 61 - www.makemkv.com

The LG BU40N 1.00 Go to product viewer dialog for this item.

firmware is the "gold standard" for enthusiasts looking to back up 4K UHD Blu-ray discs. It is highly sought after because it re-enables LibreDrive support, allowing software like MakeMKV to bypass encrypted disc protections and read UHD data at unrestricted speeds. 💿 Why BU40N 1.00 is Recommended

This specific version is favored over newer official firmware (like 1.01 or 1.04) or even the BP60NB10 variant:

Universal Compatibility: Works seamlessly with MakeMKV, DVDFab, and other decryption tools. Speed

: Removes manufacturer "rip locks" that slow down drive read speeds.

Cross-Flashing: It is the preferred target firmware for users "cross-flashing" other drives, such as the LG WP50NB40 Go to product viewer dialog for this item. or Go to product viewer dialog for this item. , to give them UHD capabilities. 🛠️ Common Flashing Steps

If you are looking to flash your drive to this version, the community typically follows these steps:

Preparation: Ensure you have MakeMKV installed and the latest MK Firmware Pack. bu40n 1.00 firmware

Tools: Most users use the SDFTool Flasher or the command-line flashing instructions found on the MakeMKV Forum. Process:

Flash to an "unlocked" version (like 1.03-MK) first if the drive has newer factory protection. Cross-flash to BU40N 1.00 to finalize the UHD setup. ⚠️ Critical Warnings

Power Stability: Portable LG drives are notorious for power issues; use a powered USB hub or the included "double" USB-A cable during the flash to avoid bricking the drive.

SVC Codes: Check the label on the bottom of your drive. Certain service codes (like NB72) may have hardware locks that prevent successful UHD reading even after flashing.

Bricking Risk: Using the wrong tool or flashing in the wrong order can render the drive unresponsive.

💡 Pro Tip: If you aren't comfortable flashing yourself, you can find pre-flashed drives on sites like UHD Enabled Drives or from reputable sellers on eBay.

is widely considered the best 4K Blu-ray drive for ripping due to its compact size and high read stability. However, modern stock firmware often blocks the ability to back up UHD discs. Downgrading to BU40N 1.00 firmware (specifically the "DE" or "Downgrade-Enabled" version) is the gold standard for restoring full LibreDrive functionality. Why Choose BU40N 1.00 Over Other Versions? While firmware like 1.03-MK is popular for general use, the DE_LG_BU40N_1.00

version is often preferred by power users for several reasons:

Broad Compatibility: Unlike some MK (MakeMKV) specific firmwares, the 1.00 DE firmware often works better with a wider range of third-party software beyond just MakeMKV.

LibreDrive Activation: It fully enables LibreDrive, allowing the drive to read data directly from the disc without the hardware-level interference common in newer versions.

Stability: Many users report that while 1.03-MK might read slightly faster initially, 1.00 is more reliable at finishing difficult rips without timeouts. How to Flash the 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.

BU40N 1.00 firmware is widely considered the "gold standard" for the LG BU40N optical drive, primarily within the community of enthusiasts who digitize Ultra HD (UHD) Blu-ray discs. It is valued for its ability to bypass official restrictions, enabling what is known as "UHD Friendly" functionality across a broad range of software. Core Importance: UHD Friendly Capability

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

: Unlike newer "MK" (LibreDrive) versions that often only work with

, version 1.00 is compatible with a wider array of tools, including Leawo Prof Media Reliability The BU40N 1

: Community stress tests have shown that while newer versions like 1.04 are often "rubbish" and prone to errors, 1.00 remains stable for long-term use. Burning Support

: Users have reported that firmware 1.00 is more reliable for burning 100GB BD-XL discs compared to newer versions, which may suffer from bugs in the burning process. Technical Specifications & Performance Read Speeds

: The drive maintains a consistent maximum UHD read speed of

on version 1.00. While some desktop drives might burst to higher speeds, they often fluctuate, whereas the BU40N on 1.00 tends to hold its top speed longer during a rip. LibreDrive Information

: When flashed to version 1.00, software like MakeMKV will typically identify the firmware type as "Original (Unpatched)" while still enabling LibreDrive features. Flashing and Cross-Flashing

Because many BU40N drives (and rebadged versions like those from HP or Verbatim) ship with newer, encrypted firmware (e.g., 1.03 or 1.05), users often "downgrade" to 1.00. Preparation : Tools like the SDFtool Flasher are used to automate the process. Encryption Bypass

: If the current firmware is encrypted, users may first need to flash to a transition firmware like

to remove encryption before they can successfully move to the "DE" (downgrade-enabled) version. Cross-Flashing

: Other slim drives, such as the LG BP50NB40 or BP60NB10, are frequently "cross-flashed" with BU40N 1.00 firmware to inherit its superior ripping capabilities and software compatibility. HP BU40N firmware flashing - www.makemkv.com

The Enthusiast’s Guide to the LG BU40N 1.00 Firmware If you’ve spent any time in the world of 4K data archiving or HTPCs (Home Theater PCs), you know that the LG BU40N is a legendary piece of hardware. This slim Ultra HD Blu-ray internal drive is a staple for enthusiasts, but its performance—and its most coveted features—often hinge entirely on one specific detail: Firmware version 1.00.

In this article, we’ll dive into why the 1.00 firmware is considered the "Holy Grail" for this drive, what it enables, and what you need to know about managing it. Why Version 1.00?

Most hardware manufacturers release firmware updates to fix bugs or increase security. However, in the world of optical drives, newer isn't always better for the end-user.

The BU40N shipped with version 1.00 early in its lifecycle. This specific version is "UHD-friendly," meaning it does not contain the restrictive "AACS2" protection hurdles found in later versions (like 1.01, 1.03, or 1.04). The Key Benefits:

LibreDrive Compatibility: 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.

4K UHD Ripping: For users looking to create digital backups of their physical 4K disc collection using software like MakeMKV, the 1.00 firmware (or a "downgraded" equivalent) is essentially a requirement.

Region Freedom: It bypasses many of the hardware-level locks that prevent users from accessing media from different global regions. The "Encrypted Firmware" Problem Drive: LG (Hitachi-LG) BU40N Firmware version: 1

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.

Newer versions often implement a "booter" update that prevents the drive from accepting older, official LG firmware files. This created a cat-and-mouse game between manufacturers and the enthusiast community, leading to the development of custom flashing tools. How to Check Your Version

Before attempting any modifications, you need to know what you're working with.

On the Sticker: The physical label on the drive often lists the manufactured date and the "ROM VER."

Via Software: Tools like MakeMKV or VSO Inspector will display the current firmware version under the "Drive Information" tab when the unit is connected to your PC. Moving Back to 1.00 (Flashing)

If your drive is on a newer, restricted version, enthusiasts often "cross-flash" or downgrade the drive.

Warning: Flashing firmware carries a risk of "bricking" (permanently breaking) your drive. Always ensure you are using the correct tools and have a stable power supply.

The community generally recommends using the "SDFTool Flasher" or the automated MakeMKV firmware pack. These tools are designed to bypass the restrictions in newer LG updates and safely install a version of the 1.00 firmware that is optimized for data extraction. Common "Flavor" of 1.00

Often, users don't flash the original factory 1.00, but rather a "clean" or patched version of it (often referred to as BU40N 1.00 MK) provided by the MakeMKV community. This version retains all the 1.00 benefits while ensuring the drive remains compatible with modern SATA-to-USB adapters. Hardware Compatibility

The BU40N is a 9.5mm slimline drive. While it is an internal laptop drive, it is most commonly used by enthusiasts in external enclosures. If you are flashing your drive to 1.00, ensure your USB enclosure uses a high-quality bridge chip (like those from Vantec or OWC), as cheap adapters can cause the flash process to fail.

The LG BU40N 1.00 firmware is the key to unlocking the full potential of one of the best slim 4K drives ever made. Whether you are building a media server or just want to ensure your physical media is truly yours to access, staying on (or moving to) version 1.00 is the gold standard.

This firmware version is a critical milestone for 4K UHD ripping and playback.

1. Exact Identification

• Drive: LG (Hitachi-LG) BU40N
• Firmware version: 1.00
• Significance: This is the original factory-shipped firmware for early production units. It is rare because most drives have been updated to 1.01, 1.02, 1.03, or 1.04 via LG’s update tool or automatic Windows updates.

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.

2. No "Sleep Bug"

Newer firmware versions suffer from an infamous "sleep bug." If the drive sits idle for 20 seconds while reading a UHD disc, it enters a low-power state. To wake it up, MakeMKV must send a reset command, often causing the rip to freeze or fail. BU40N 1.00 firmware does not have this sleep bug.

The Ultimate Guide to BU40N 1.00 Firmware: Unlocking UHD LibreDrive on Your LG Drive

In the world of optical media archiving and 4K Blu-ray ripping, few topics generate as much discussion in forums like MakeMKV, Reddit, and Doom9 as the BU40N 1.00 firmware.

If you own an LG BU40N slim internal Blu-ray drive, you have likely stumbled upon warnings not to update your firmware. You may have seen cryptic references to "SVC code NS50" or "flashing to 1.00." This article is the definitive resource for understanding what this firmware version is, why it is the "Holy Grail" for ripping 4K UHD discs, and exactly how to use it safely.