1tune2fs ^metadata_csum test 2Creating filesystem with 524288 1k blocks and 65536 inodes 3Superblock backups stored on blocks: 4 8193, 24577, 40961, 57345, 73729, 204801, 221185, 401409 5 6Allocating group tables: done 7Writing inode tables: done 8Creating journal (16384 blocks): done 9Creating 477 huge file(s) with 1024 blocks each: done 10Writing superblocks and filesystem accounting information: done 11 12Pass 1: Checking inodes, blocks, and sizes 13Pass 2: Checking directory structure 14Pass 3: Checking directory connectivity 15Pass 4: Checking reference counts 16Pass 5: Checking group summary information 17 18Exit status is 0 19tune2fs -O ^metadata_csum test.img 20Exit status is 0 21Change in FS metadata: 22@@ -2,7 +2,7 @@ 23 Last mounted on: <not available> 24 Filesystem magic number: 0xEF53 25 Filesystem revision #: 1 (dynamic) 26-Filesystem features: has_journal ext_attr resize_inode dir_index filetype extent 64bit flex_bg sparse_super large_file huge_file dir_nlink extra_isize metadata_csum 27+Filesystem features: has_journal ext_attr resize_inode dir_index filetype extent 64bit flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize 28 Default mount options: user_xattr acl 29 Filesystem state: clean 30 Errors behavior: Continue 31@@ -33,7 +33,6 @@ 32 Journal inode: 8 33 Default directory hash: half_md4 34 Journal backup: inode blocks 35-Checksum type: crc32c 36 Journal features: (none) 37 Journal size: 16M 38 Journal length: 16384 39Pass 1: Checking inodes, blocks, and sizes 40Pass 2: Checking directory structure 41Pass 3: Checking directory connectivity 42Pass 4: Checking reference counts 43Pass 5: Checking group summary information 44 45Exit status is 0 46