I've noticed unraid doesn't seem to be using my ram cache, or it's using it in small bursts.  When writing to my array over 10GBe network, it has deep troughs of speed. It will start out writing, say, a movie, at 200MB/s, but basically stop every 2 seconds. During this stop, I see disk usage go up on the server.  Why not either write all of the file directly to the disks, or write all of the files to the ram and complete the move in the background?    I have 256gb ram, and tw