You need format new HDD in GPT (Not MBR. All 2TB+ HDD formatted in GPT by default).
Full instruction here: (Translated from Russian)
https://drive.google.com/file/d/0B_6OlQ_H0PxVejVic2ZubXBfbHM/edit?usp=sharing
Supported all HDD with sata interface (Tested on 120GB 2.5" notebook hdd 
)
Also you can install clean debian or debian+OMV. Read my post about that:
http://community.wd.com/t5/WD-My-Cloud/Clean-debian-and-OpenMediaVault-on-WDMyCloud/td-p/785505
