I read the man page, but I didn’t see the answer to your question in there.
I am assuming that it would only dump the root filesystem in your example. Other mounted filesystems like /home or /media, if they’re separate filesystems, probably aren’t included. You’d have to run a separate dump for each one.
Best option to find out is to try it and see what happens. No better way to learn than by doing.
I just got a Steam Deck, and I bought Baldur’s Gate 3. Pretty sure I’ll finish it on my deathbed. It feels like the hour here or there that I manage to play is not getting me anywhere fast.
Mother-in-law ended up getting COVID last week, so her birthday plans on Christmas Eve were cancelled, plus they couldn’t come to see the kids today. Our hot water heater seems to have a failed thermocouple, so we have no (instant) hot water at the moment.