1 create fs with metadata_csum
2 Filesystem UUID: 6b33f586-a183-4383-921d-30da3fef2e5c
3 change UUID
4 Filesystem UUID: 6b33f586-a183-4383-921d-30da3fef2e5c
5 check filesystem
6 fsck returns 0
7 Filesystem UUID: 6b33f586-a183-4383-921d-30da3fef2e5c
8