Slow Read Speeds from Array causing Movies to Stutter

[colev14]

Hello, I'm having an issue watching movies from my Unraid server streaming to Plex, Jellyfin, and even Kodi over SMB. I've done a ton of troubleshooting and it seems to be specifically high bit rate movies from the array start stuttering every few minutes. I'm not sure if there's something I can do to fix the issue. I have never had it in the past.

 

I have my Unraid Server with a 2.5G NIC and the Shield has a gigabit ethernet. I've run an iperf test and gotten 800Mb between both devices. I exported it and attached it below. I have benchmarked my drives and attached an image below. I've also attached my diagnostics.

 

The test file I have been using is a 58GB 4K DV Remux of Barbie. The file is on Disk 8 of the Array and buffers constantly when playing on Plex, Jellyfin, and Kodi. I copied the file to my nvme cache drive and it plays back fine with no stuttering on Kodi, so it seems like a read speed issue. But based on the benchmarks, I have plenty of speed I think? There is nobody else watching anything on the server. I'm kind of lost on what to do. I have not had this issue until recently.

iperf_2024-06-09_12-29-04.txt unraid-diagnostics-20240609-1217.zip

[JorgeB]

Disk speeds look normal, I assume there's nothing else reading or writing to the array when that happens?

[colev14]

Yes, nothing else reading or writing to the array.

[JorgeB]

Try using a disk share to see if there's any difference.