1tune2fs test 2Creating filesystem with 786432 1k blocks and 98304 inodes 3Superblock backups stored on blocks: 4 8193, 24577, 40961, 57345, 73729, 204801, 221185, 401409, 663553 5 6Allocating group tables: done 7Writing inode tables: done 8Creating journal (16384 blocks): done 9Creating 6334 huge file(s) with 117 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 -I 256 -O metadata_csum test.img 20Setting inode size 256 21 22Please run e2fsck -fD on the filesystem. 23 24Exit status is 0 25Backing up journal inode block information. 26 27Pass 1: Checking inodes, blocks, and sizes 28Pass 2: Checking directory structure 29Pass 3: Checking directory connectivity 30Pass 3A: Optimizing directories 31Pass 4: Checking reference counts 32Pass 5: Checking group summary information 33 34 35 36Change in FS metadata: 37@@ -5 +5 @@ 38-Filesystem features: has_journal ext_attr dir_index filetype extent 64bit sparse_super large_file huge_file uninit_bg dir_nlink extra_isize 39+Filesystem features: has_journal ext_attr dir_index filetype extent 64bit sparse_super large_file huge_file dir_nlink extra_isize metadata_csum 40@@ -21 +21 @@ 41-Inode blocks per group: 128 42+Inode blocks per group: 256 43@@ -27 +27 @@ 44-Inode size: 128 45+Inode size: 256 46@@ -30,0 +31 @@ 47+Checksum type: crc32c 48Pass 1: Checking inodes, blocks, and sizes 49Pass 2: Checking directory structure 50Pass 3: Checking directory connectivity 51Pass 4: Checking reference counts 52Pass 5: Checking group summary information 53 54Exit status is 0 55