libfreemkv

Open source raw disc access library for UHD Blu-ray optical drives.

Enables direct sector reading on compatible drives for UHD Blu-ray archival, backup, and media extraction. Ships with community-contributed drive profiles — no proprietary data files needed at runtime.

Features

• Drive identification — SCSI INQUIRY + GET CONFIGURATION for automatic profile matching
• Raw read mode — activate enhanced read mode on supported drives
• Speed calibration — optimal read speed per disc region
• Raw sector reading — direct READ(10) access to disc sectors
• Drive profiles — per-drive SCSI command data, shipped as JSON files
• Community-driven — submit new drive profiles via freemkv-info

Supported Drives

Currently supports 280+ LG, ASUS, and HP optical drive firmware versions across the MediaTek MT1959 chipset family. Pioneer Renesas support is in progress.

See profiles/ for the full list.

Installation

cargo install libfreemkv

Or add to your Cargo.toml:

[dependencies]
libfreemkv = "0.1"

Quick Start

As a library

use libfreemkv::DriveSession;
use std::path::Path;

let mut session = DriveSession::open(
    Path::new("/dev/sr0"),
    Path::new("profiles/"),
)?;

session.enable()?;        // activate raw read mode
session.calibrate()?;     // optimize read speed

let mut buf = vec![0u8; 2048];
session.read_sectors(0, 1, &mut buf)?;

freemkv-info

Identify your drive and check compatibility:

$ freemkv-info /dev/sr0
Drive: HL-DT-ST BD-RE BU40N 1.03
Chipset: MT1959
Raw Read: Supported
Profile: Found (mt1959_a)

$ freemkv-info /dev/sr0 --raw
# Dumps full INQUIRY and GET CONFIGURATION responses as hex
# Useful for contributing profiles for unsupported drives

freemkv-test

Verify raw read mode works:

$ freemkv-test /dev/sr0
Enabling raw read mode... OK
Calibrating speed... OK (42 speed zones)
Reading sector 0... OK (2048 bytes)
Reading sector 1000... OK (2048 bytes)
All checks passed.

Contributing Drive Profiles

If your drive isn't supported, you can help:

1. Run freemkv-info /dev/sr0 --raw > my_drive.txt
2. Open an issue or PR with the output
3. We'll generate a profile from your drive data

This is especially needed for Pioneer drives.

Architecture

DriveSession
├── ScsiTransport     — SG_IO (Linux) / IOKit (macOS)
├── DriveProfile      — per-drive JSON data
└── Platform          — per-chipset unlock + read logic
    ├── Mt1959        — LG/ASUS MediaTek drives
    └── Pioneer       — Pioneer Renesas drives (WIP)

The library implements 10 drive commands per platform:

Command	Purpose
enable	Activate raw read mode
read_config	Read drive configuration
read_register	Read hardware registers
calibrate	Build speed optimization table
keepalive	Session keepalive
status	Read mode status and features
probe	Generic drive query
read_sectors	Read raw disc sectors
read_disc_structure	Read disc metadata
timing	Timing calibration

License

AGPL-3.0-only