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,uninit_bg test.img Exit status is 0 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 dir_nlink extra_isize metadata_csum +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 Default mount options: user_xattr acl Filesystem state: clean Errors behavior: Continue @@ -33,7 +33,6 @@ Journal inode: 8 Default directory hash: half_md4 Journal backup: inode blocks -Checksum type: crc32c Journal features: (none) Journal size: 16M Journal length: 16384 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