Yes. My bad. Its my main source of playback for media inside my home. Hard wired into network. Run plex client on it.
I honestly got a little aggravated when I saw this about the roku. But, it's a little strange that plex spikes like that if its not transcoding. It's usually only in the beginning.
That is one thing I did after posting. I downloaded Dynamix SSD to execute trimming on a daily basis in quiet hours and changed the mover to daily at 2am.
You know. This is something I may humor. I don't really see a point after you said this. I have a 500GB ssd. Only bad thing is I seed for a max of 7 days per some private trackers requirements. But, not using mover saves the disk space temporarily on the array and puts the array threw less writes. I may actually do this. I can also execute the mover manually if I need to.
Lastly, something I realized is LIVE TV on plex is a CPU and Network hog. Transcoding to MPEG2 and streaming it on average of around 18mbps. And, with my tuner, I can't change the quality. I am a power user. At most, I could have 2 remote users streaming at 4mbps (both transcoding). A local stream at 20-40mbps. Usually direct play or stream. Sometimes transcoding. And, I usually have a local live tv session watching football. So, I have to figure out if I am saturating my network or if unraid is just consumed with so much writing/reading that my hardware or OS is having issues keeping up.
I didn't have issues on windows. However, the PC had an NVME ssd running windows and plex/transcoding and I had another dedicated SSD for downloading and a RAID 5 array for media data.