Recently I need to store and pull alot of video files(.mp4) between my laptop and unraid server, these files store at my cache SSD, it's a exclusive share, I noticed slow than usually smb transfer speed, my home network is all 2.5G, that means both NIC, switch and router are all in 2.5G mode.

 

Other big files such as zip, rar and 3dm are totally fine, max out at 249mb/s but when it's a video .mp4 file from my DJI camera or a simiply a moive, it usually at 50 to 100mb/s, I rarely did this before so maybe this problem exist on previous version, this only happen on smb transfer, downloading or uploading the video file tho unraid webui can also reach nearly the max speed, so I guess there should be some settings I need change in windows maybe?

You should post your diagnostics.

1 minute ago, Gragorg said:

You should post your diagnostics.

sorry, I was checking the windows side, forgot to pull it.

 

 

185409-diagnostics-20250104-2210.zip

Seems unlikely that it would be an Unraid issue, it doesn't care about the file types, post the Windows explorer transfer graph.

in my windows 10 it look like this, I also feel this is something related to windows explorer

Try doing a local read of the same file and post the results:

 

pv /path/to/mp4 > /dev/null

 

I have seen this happen on Windows client computers occasionally.  (Many long, long years ago, I had this problem as a constant condition.  After updating the Realtek NIC Windows driver, it disappeared.)  Remember that Windows has resource priority settings on background tasks.  (And file copying is definitely a background task!)  I have suspected that other network traffic on the Windows NIC triggers it but I could be wrong. 

 

I would suggest, rebooting the Windows computer and run the tests again where the copy operation is only thing running.