Please add CONFIG_FANOTIFY support in Linux Kernel. I'm noticing some strange disk spin ups in recent builds, but without fanotiy it's painful to troubleshoot (can only use inotify recursively, causing disk never spin down).
Actually, most new kernels have enabled this config (Ubuntu, Debian, recent version of RedHat). As UnRAID is mainly oriented towards storage, there's no reason to keep this option off.