Sooo basically if you were using XFS you wouldn't need to do anything at all till it got 99% full, and if you got it there you'd just get "disk is full" message

Sooo basically if you were using XFS you wouldn't need to do anything at all till it got 99% full, and if you got it there you'd just get "disk is full" message instead of some catastrophe? I don't need that kind of stress in my life... And with plain RAID6 I can still add hard drives if needed. Yeah the case of buying bigger drives is still a bit iffy but btrfs RAID1 gonna lose me more space than RAID6+LVM+xfs anyway...