Looks like the HD is still up and running. You should check the X1 documentation to see if there needs to be some configuration done on the X1 or external HD to allow the X1 to put the HD to sleep. Or better yet contact Lumin, they are active on AudioShark and ComputerAudiophile web sites. The Lumin guy responding on the forums will give you the best answer. I think I posted his name on A’gon a few months ago.
https://forum.audiogon.com/discussions/lumin-t2-dac-gone-bad-distortion-spitting-splatty-in-mids-highs/post?highlight=Lumin%2Bcontact&postid=1969856#1969856
https://forum.audiogon.com/discussions/lumin-t2-dac-gone-bad-distortion-spitting-splatty-in-mids-highs/post?highlight=Lumin%2Bcontact&postid=1969856#1969856