Just in case this helps anyone with a Drobo5N and WDTVLive SMP…
I could not stream anything without glitching and pausing. Pulled my hair out for days. Reset WDTV, reset all shares, I downgraded fw to 1.12.14 today, all to no avail.
BUT, I did find my Cisco E4200 router had a newer firmware availabe, and the readme mentioned something about better streaming support for Apple Air Play, and improved QoS. hmm. I upgraded and it was fixed. I watched AVATAR which was my biggest 1080 .mkv file and it played perfectly. Then I shut down my PC while the NAS was streaming to the WD, and it started to glitch…crazy.
Restarted the PC and all was well. Made no sense.
I made sure I stopped all sharing on the PC, and I went back into the router config and did DHCP reservations for the WD and NAS, because I read here that this can help. I also routed a few ethernet feeds that were direct to the router, into the switch instead, and lastly I replaced some cable with Cat6.
Not sure which of the last measures solved the last piece of the puzzle, but I’ve now watch 4 more movies today and it streamed perfectly, and I can shut down my PC with no ill effect. .mkv, ISO and avi.
Note to anyone looking at Drobo5N, get the mSata card that goes in the bottom. Better, faster reads, which will help with streaming. The HDD light blinks casually once every 2 seconds or so. No stress at all.