Q: Disks won't stay unmounted When not using my 2019 MBP, I keep it in a back room plugged into a bank of backup drives.
When I want to use it, I want to take it into the living room.  So, I go and dismount any drives that aren't doing a backup.  I could stop/skip a running backup, but normally, I let it finish and then dismount.  I don't unplug them, because only one is plugged in—it is a powered hub for the others.
Unfortunately, frequently when I come back, they're all mounted again.  I don't know whether this is triggered by auto-logout, by logging back in, or just some timer.  But it's irritating—I have to dismount again and wait for write buffers to be processed before I can unplug and move the laptop.
Is there a way to make them stay unmounted?
