UPDATE: My development MBL which died is back alive

During kernel 5.4 Asynchronuous DMA driver work, my MBL died over 18 months ago. Apperently u-boot and/or u-boot variables were corrupted. In a nothing-to-lose-effort, I managed to unsolder a chip and reflash it.

My-Book-Live (MBL) customization

Kernel patches and Debian release for Western Digital My Book Live.
NOTE: these customizations will void your warranty and are delivered on best-effort only
NOTE: while the posted methods allow you to fully customize a MBL without ever opening it, you need to keep in mind that there might be a failure which requires you to ultimately open up the shell.
NOTE: none of this work is tested on a My Book Live DUO for the simple reason that we don't own one. That said it, community members have successfully deployed on MBL Duo.

Why customize ?

• My disk died: in this scenario, you may have to open up your MBL if your warranty is void and you will be exposed to the "complexity" of Linux commands/shell scripts, formatting, u-boot, etc. It's a good time to explore all the possibilities.
• Supportability: original firmware comes with Debian Lenny (5.0.x), which was released in February 2009. Security and other updates have been discontinued as of February 2012. While Western Digital has done a great job to provide updated firmware, it's ultimately impossible to keep up with back-porting vulnerability updates on pre-2010, outdated releases.
• Security vulnerabilities: protect your valuable data (see report)
• Performance: custom kernels can increase your performance by 50%+
• Functionality: many new packages are no longer supported on 2.6 kernels and Debian Jessie (e.g. newer versions of Samba with better Windows 10 support)

Why not customize ?

• Losing WD support/warranty
• Loss of the graphical user interface: while it's possible to port the original web user interface, it's not really worth it the time and effort.

Tree Structure

• debian: Debian 8.11 with security patches backported to PowerPC
• kernel: Kernel patches, pre-compiled kernels and device tree structure
• samba : Optimal perfomance with Samba using sample config files
• uboot : Netconsole support, u-boot boot files, TFTP boot and ways to safely boot My Book Live

Documentation is posted within each section.

Latest validated kernel support

• Kernel 2.6.32.71, released Sat, 12 Mar 2016
  
• Kernel 4.9.169, released Wed, 17 Apr 2019
  
• Kernel 4.19.99, released Mon, 27 Jan 2020

What is new ?

• 4.19 kernel (pre-compiled and patches) released
• high performance kernel 4.19.99 released
• patches updated for 4.19.99
• section on Samba
• section on cross-compiling kernels
• fixed a few Github postng issues
• released 4.9.149 & 4.9.169
• support for TFTP booting including netconsole support
• initramfs section
• improved section on installing custom kernels on original firmware
• update on Debian sources.list (package repositories)

Known issues

• (Disk activity) led not working on 4.19 kernels