tune2fs metadata_csum test Creating filesystem with 524288 1k blocks and 65536 inodes Superblock backups stored on blocks: 8193, 24577, 40961, 57345, 73729, 204801, 221185, 401409 Allocating group tables: done Writing inode tables: done Creating journal (16384 blocks): done Creating 477 huge file(s) with 1024 blocks each: done Writing superblocks and filesystem accounting information: done Pass 1: Checking inodes, blocks, and sizes Pass 2: Checking directory structure Pass 3: Checking directory connectivity Pass 4: Checking reference counts Pass 5: Checking group summary information Exit status is 0 tune2fs -O metadata_csum test.img Please run e2fsck -fD on the filesystem. Exit status is 0 test_filesys was not cleanly unmounted, check forced. Pass 1: Checking inodes, blocks, and sizes Pass 2: Checking directory structure Pass 3: Checking directory connectivity Pass 3A: Optimizing directories Pass 4: Checking reference counts Pass 5: Checking group summary information Change in FS metadata: @@ -2,7 +2,7 @@ Last mounted on: <not available> Filesystem magic number: 0xEF53 Filesystem revision #: 1 (dynamic) -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 +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 Default mount options: user_xattr acl Filesystem state: clean Errors behavior: Continue @@ -10,7 +10,7 @@ Inode count: 65536 Block count: 524288 Reserved block count: 26214 -Free blocks: 571 +Free blocks: 568 Free inodes: 65048 First block: 1 Block size: 1024 @@ -33,6 +33,7 @@ Journal inode: 8 Default directory hash: half_md4 Journal backup: inode blocks +Checksum type: crc32c Journal features: (none) Journal size: 16M Journal length: 16384 @@ -46,8 +47,8 @@ Block bitmap at 262 (+261) Inode bitmap at 278 (+277) Inode table at 294-549 (+293) - 21 free blocks, 536 free inodes, 2 directories, 536 unused inodes - Free blocks: 4413-4433 + 18 free blocks, 536 free inodes, 2 directories, 536 unused inodes + Free blocks: 4413, 4417-4433 Free inodes: 489-1024 Group 1: (Blocks 8193-16384) [INODE_UNINIT] Backup superblock at 8193, Group descriptors at 8194-8197 Pass 1: Checking inodes, blocks, and sizes Pass 2: Checking directory structure Pass 3: Checking directory connectivity Pass 4: Checking reference counts Pass 5: Checking group summary information Exit status is 0