Legend! It found a second filesystem named “UNREACHABLE”:
It looks like an exact duplicate of my main filesystem “/@rootfs”, I’m guessing this is why my disk space filled up. Do you know how I’d go about removing the duplicate? (If it’s safe to do so)
Looks like some combination of defragging & balancing has done the trick! The space that was previously marked
UNREACHABLE
is nowUNUSED
, and my disk space is back to normal:Thanks for the wiki link, Btrfs is new to me and I’ve definitely got some learning to do