Disregard my previous failure report on this thread.
I am glad to inform that I was able to sucessfuly install and run Plex Media Server on MyCloud with Clean Debian by following the procedure described here: https://bitbucket.org/inkubux/cubox-i/wiki/Plex%20Wheezy
A few notes:
- I used latest Drobo NAS build: https://plex.tv/downloads (Package for Drobo 5N Version 0.9.11.1.678-c48ffd2).
- You will need to install the wheezy-armel chroot OUTSIDE of the md raid 2GB partition (Plex server itself is huge, this is a MUST). Locate it somewhere in /DataVolume and adapt appliable paths supplied in above instructions page.
- You will need to add extra chroot bind mount points to /etc/fstab so as to make your /DataVolume/shares/Whatever_Data_Folders available to Plex inside the chroot environment.