I added the latest Merlin firmware onto the router and set the SMB version to 1 only. This appears to have solved the problem. But thanks for the info above. Really helpful.
Question: is that smb.conf on the last line different to what I did in the firmware?
How did you move it back to SMB1? The official firmware release does not have this option.
Edit: I do have the same setup and same issue as yours: slow playback on some files.
I have a couple of hard drives connected to my RT-AC86U. These hard drives act as NAS for the Plex Server on Nvidia Shield. Since the firmware version 3.0.0.4.384.81049 (released on 05-09-2019), I randomly get the message below in the router log whenever Plex needs to play a file: "Oplock break...
Something interesting that might help others. My RT-AC86U is on the latest firmware 3.0.0.4.384_21140
I have two external portable HDD connected via a powered USB hub to the USB 3.0 port of the router. I noticed that the USB Mode for these two HDDs were on USB 2.0, so changed it to USB 3.0. But...