1tune2fs metadata_csum test 2128-byte inodes cannot handle dates beyond 2038 and are deprecated 3Creating filesystem with 524288 1k blocks and 65536 inodes 4Superblock backups stored on blocks: 5 8193, 24577, 40961, 57345, 73729, 204801, 221185, 401409 6 7Allocating group tables: done 8Writing inode tables: done 9Creating journal (16384 blocks): done 10mke2fs: Operation not supported for inodes containing extents while creating huge files 11Writing superblocks and filesystem accounting information: done 12 13Pass 1: Checking inodes, blocks, and sizes 14Pass 2: Checking directory structure 15Pass 3: Checking directory connectivity 16Pass 4: Checking reference counts 17Pass 5: Checking group summary information 18 19Exit status is 0 20tune2fs -O metadata_csum test.img 21Extents are not enabled. The file extent tree can be checksummed, whereas block maps cannot. Not enabling extents reduces the coverage of metadata checksumming. Re-run with -O extent to rectify. 2264-bit filesystem support is not enabled. The larger fields afforded by this feature enable full-strength checksumming. Run resize2fs -b to rectify. 23Exit status is 0 24 25Change in FS metadata: 26@@ -2,7 +2,7 @@ 27 Last mounted on: <not available> 28 Filesystem magic number: 0xEF53 29 Filesystem revision #: 1 (dynamic) 30-Filesystem features: has_journal ext_attr resize_inode dir_index filetype sparse_super large_file 31+Filesystem features: has_journal ext_attr resize_inode dir_index filetype sparse_super large_file metadata_csum 32 Default mount options: user_xattr acl 33 Filesystem state: clean 34 Errors behavior: Continue 35@@ -30,6 +30,7 @@ 36 Journal inode: 8 37 Default directory hash: half_md4 38 Journal backup: inode blocks 39+Checksum type: crc32c 40 Journal features: (none) 41 Total journal size: 16M 42 Total journal blocks: 16384 43@@ -39,7 +40,7 @@ 44 Journal start: 0 45 46 47-Group 0: (Blocks 1-8192) 48+Group 0: (Blocks 1-8192) [ITABLE_ZEROED] 49 Primary superblock at 1, Group descriptors at 2-3 50 Reserved GDT blocks at 4-259 51 Block bitmap at 260 (+259) 52@@ -48,7 +49,7 @@ 53 0 free blocks, 1013 free inodes, 2 directories 54 Free blocks: 55 Free inodes: 12-1024 56-Group 1: (Blocks 8193-16384) 57+Group 1: (Blocks 8193-16384) [ITABLE_ZEROED] 58 Backup superblock at 8193, Group descriptors at 8194-8195 59 Reserved GDT blocks at 8196-8451 60 Block bitmap at 8452 (+259) 61@@ -57,6 +58,6 @@ 62 0 free blocks, 1024 free inodes, 0 directories 63 Free blocks: 64 Free inodes: 1025-2048 65-Group 2: (Blocks 16385-24576) 66+Group 2: (Blocks 16385-24576) [ITABLE_ZEROED] 67 Block bitmap at 16385 (+0) 68 Inode bitmap at 16386 (+1) 69Pass 1: Checking inodes, blocks, and sizes 70Pass 2: Checking directory structure 71Pass 3: Checking directory connectivity 72Pass 4: Checking reference counts 73Pass 5: Checking group summary information 74 75Exit status is 0 76