2020-01-08, 09:43 PM
So, gnome-disks was making edits to fstab, but when I checked the fstab entry it seemed fishy. I figured out that I had a tiny (~100Mb) "system reserved" partition at the beginning of the drive that I hadn't noticed before. I was able to track down that gnome-disks was doing what I asked it to, just on the wrong partition ('Doh! ).
Thank you for your advice; everything seems to be working fine now! Sorry for being such a newb.
Thank you for your advice; everything seems to be working fine now! Sorry for being such a newb.