Audz

Hello, I am getting slow transfer speeds from ssd to ssd on my unraid server(both housed in the same server physically) I get speeds up to 400MB/s then it quickly drops to around 20-30MB/s for a ~20GB file. I have tried to run the fstrim and balance commands in the unraid console and the fstrim will not work it gives an error(see attached snip). The unraid gui/dockers are also freezing and acting sluggish during the transfer of files to the cache until its completed or stopped manually. Unraid is running on a Dell R720xd chassis with the ssds located at the back of the server in the 2.5 slots. I am using the dell 710p mini monolithic card flashed to IT mode. The ssds I am using are 2x 512gb Samsung 850 Pro drives to test with, one is cache other is a UA drive. I read that hbas sometimes will not allow the trim commands to go through to the drives, is that the case here or is there something else I am missing? If anything else is needed to help diagnose my issues please let me know.