1create fs without csum_seed
2Filesystem UUID:          6b33f586-a183-4383-921d-30da3fef2e5c
3turn on csum_seed
4Filesystem UUID:          6b33f586-a183-4383-921d-30da3fef2e5c
5Checksum seed:            0x3ba62721
6change UUID
7Filesystem UUID:          a61be2e0-b3b8-4fbc-b2cd-d84b306b9731
8Checksum seed:            0x3ba62721
9check filesystem
10fsck returns 0
11Filesystem UUID:          a61be2e0-b3b8-4fbc-b2cd-d84b306b9731
12Checksum seed:            0x3ba62721
13turn off csum_seed
14Filesystem UUID:          a61be2e0-b3b8-4fbc-b2cd-d84b306b9731
15check filesystem
16fsck returns 0
17Filesystem UUID:          a61be2e0-b3b8-4fbc-b2cd-d84b306b9731
18