So Ive been playing more with Plex but still having network drive issues. So I ripped everything out of Plex and started over. This time I created the video source as an SMB share and set up the folder itself on the iMac as an SMB. Plex saw it and populated all my movies which was good, but it took so long I havent had a chance to test it out yet.
However, I never found an option for NFS. Not sure if this would prove to be more reliable or not.
One thing I noticed though, regardless of how I get the movies into plex, Plex on my Mini DOES NOT like MKV files. Whereas Plex on my iMac doesnt have any issues at all. Is that a RAM thing? If so I can put a couple bigger sticks in the Mini. If its a network thing, I was thinking about just hanging a large external drive right off the Mini and not worrying about all this crap!
Plex will be fine with SMB but you'll have to re-enter the username and password for the shares after every Plex restart. Sleep should work fine though.
I've never, ever had Plex fail to play an MKV on my Mini and I've got over 300 DVDs encoded using MKV.