Since a fresh install of buster, an external USB3 hard disk cage from Terramaster that I own is not automatically spinning down the disks in it when they go unused for a time.
I used a previous generation of the cage with Stretch previously, it spun down the disks when they were not in use (actually a little too quickly for my taste) reliably and I don't recall doing anything to make that happen. Any thoughts on where I might look to find settings that can be tweaked to make it spin down when idle? A friend of mine uses the same cage with a Mac and says it spins down when not in use, so I feel like I should be able to do it somehow. The only thing I can think of that I've tweaked since installing buster is to disable suspend, as I didn't want the whole computer suspending when I was away for a bit, as this computer does a lot of background processing. I wonder if I overdid that and disabled something I should have left enabled? The solution to that problem involved disabling a couple of systemd targets. I just re-googled that problem because I couldn't remember what targets I disabled -- and now I see on the wiki that they are sleep.target hibernate.target suspend.target and hybrid-sleep.target. The wiki says to do "systemctl mask" on those targets but I suspect I followed someone else's advice and did "systemctl disable" on those targets. Any link to this problem? Otherwise where should I look? Thanks Mark