I've been dealing with this issue since the very beginning, maybe like ten years.

So I have my video share (/mnt/user/vid) mapped to nzbget, and let's say I've grabbed a 80TB video file and nzbget is unpacking it. So it's reading / writing to the array at full speed. And the array is cached so the 80TB unpacking operation should be hitting the array.

While this is happening, the entire system seems to freeze up. I can't access shares, my VMs are unresponsive, even the UI is lagging. It seems to get restored briefly for maybe 5 to 10 seconds, then goes back to freezing again.

When nzbget is done with the 80TB file, everything works again.

I've casually tried to get to the bottom of this but nothing I've tried has helped. Latest attempt was turning on turbo write but had no impact.

Anyone else experience this? I've seen on reddit the same issue with no real solutions.

I'm at a point where I'm preparing to replace my unraid server with something else, I'm just sick of dealing with this.

Thanks!

Edited September 22, 2025Sep 22 by thisguyhere

I've seen this before with other users; it's unclear why it only happens to a few users. The best workaround, IMHO, is to unzip to a pool and then use the mover to move the data to the array.