Check it out, over on the WD My Cloud forum…
…some one has got Linux Debian working on the My Cloud with lots of features.
* OpenMediaVault and Debian Wheezy 7.6 new kernel includes: NTFS, USB-Sound, CIFS, Autofs, ISCSI-Target, Ramlog, mdadm and some tweaks for work), Quota and more.
Yes, you can upgrade to Jessie or "Sid" - All works fine.
And you can use "Clean debian" - Its run faster. (And install under that - WebMin or Newer version of OMV (1.0.8))
My "FirmWare" does not modify anything. (Used original layout - easy to install)
OMV = OpenMediaVault - Its free NAS OS, include CIFS/Samba shares, FTP, SMART monitoring, E-Mail notifications, Sync (Backup) services and more stuff in addition repository from commynity - Transmission, Web server (NGinx, PHP5, MySQL5), BTSync, OwnCloud!, ISCSI Target, MiniDLNA and lots of other stuff!
He is working a full How To at this time but has posted enough to get it installed and working. Even though he is translating from Russian, his Google drive is accessible with all you need to make it happen. Head over and check it out and report your results!