I ran btrfs on a laptop. 2 things. Once I ended up with a bunch of zero length files (presumably metadata was written before content?). I also, multiple times

I ran btrfs on a laptop. 2 things. Once I ended up with a bunch of zero length files (presumably metadata was written before content?). I also, multiple times ended up with errors related to full drives despite by drive not being full. Deleting snapshots seemed to help. Then I went to a zfs fs on root and never had another problem.