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 22This operation requires a freshly checked filesystem. 23 24Please run e2fsck -fD on the filesystem. 25 26Exit status is 0 27Backing up journal inode block information. 28 29Pass 1: Checking inodes, blocks, and sizes 30Pass 2: Checking directory structure 31Pass 3: Checking directory connectivity 32Pass 3A: Optimizing directories 33Pass 4: Checking reference counts 34Pass 5: Checking group summary information 35 36 37 38Change in FS metadata: 39@@ -5 +5 @@ 40-Filesystem features: has_journal ext_attr dir_index filetype extent 64bit sparse_super large_file huge_file uninit_bg dir_nlink extra_isize 41+Filesystem features: has_journal ext_attr dir_index filetype extent 64bit sparse_super large_file huge_file dir_nlink extra_isize metadata_csum 42@@ -21 +21 @@ 43-Inode blocks per group: 128 44+Inode blocks per group: 256 45@@ -27 +27 @@ 46-Inode size: 128 47+Inode size: 256 48@@ -30,0 +31 @@ 49+Checksum type: crc32c 50Pass 1: Checking inodes, blocks, and sizes 51Pass 2: Checking directory structure 52Pass 3: Checking directory connectivity 53Pass 4: Checking reference counts 54Pass 5: Checking group summary information 55 56Exit status is 0 57