mmenanno

Well must have been the onboard NIC that died. I went out and bought a PCIe NIC, disabled the onboard one and everything works now.

Ok so I've figured out the issue. I previously had Movies / TV Shows / etc as their own top level shares, which zfs treats as datasets. I've been converting things to be under a top level "/data" share/dataset now and if I move things within this share/dataset over SFTP it works no problem. So it would appear that when using unraid zfs datasets with SFTP that the protocol doesn't understand that it will have to do a copy + delete for this type of move instead of just a rename.
 
Is this something that could be improved in the OS? Or is this an incompatibility of zfs with sftp?

@Richard Aarnink Yeah I had tried all those steps and none of them fixed it. I got the new processor today though, and the hardware acceleration crash that I was able to replicate no longer happens, so fingers crossed that my issue is fully solved.