New in Unraid OS 6.8 release:   The unRAIDServer.plg file (update OS) still downloads the new release zip file to RAM but then extracts directly to USB flash boot device.  You will probably notice a slight difference in speed of extract messages.  There is still a 'sync' command at the end, which causes each device to spin up serially as Linux kernel syncs each device (why does kernel do this serially? I have no idea).  I am tempted to remove this because a Reboot of course spins every