I am transferring a little over 3TB of data from a drive to my array, not going to cache. The drives in my array are slow, i knew that going in. But my CPU usage started to creep up steadily. After about 10 hours my CPU usage hit 100% on all 24 threads (2x E5-2630L v2). Even before this all unraid dockers were unresponsive. I was able to load the docker tab and stop binhex-krusader, and my CPU usage went back to normal, ~10%. My files kept transferring over from the unassigned drive to the array.
Did I do something wrong, should I not have transferred that much at one time?