I'm the author of the document on how to revive a completely bricked Mybook, even after a disk failure.
Starting point are:
Mybook repository - main page with software and link to other main documents
How to revive a Mybook - main document with complete steps to compile kernel and bootloaders, and quicksteps to get a minimal functions from Mybook (i.e. ssh access, full apt support and so on.
In the category Mybook you can find documents to install and configure some services and news about revived Mybook.