1Filesystem volume name: <none> 2Last mounted on: <not available> 3Filesystem magic number: 0xEF53 4Filesystem revision #: 1 (dynamic) 5Filesystem features: has_journal ext_attr resize_inode dir_index filetype extent 64bit flex_bg sparse_super huge_file dir_nlink extra_isize metadata_csum 6Default mount options: (none) 7Filesystem state: clean 8Errors behavior: Continue 9Filesystem OS type: Linux 10Inode count: 1024 11Block count: 16384 12Reserved block count: 819 13Overhead clusters: 1543 14Free blocks: 14786 15Free inodes: 1005 16First block: 1 17Block size: 1024 18Fragment size: 1024 19Group descriptor size: 64 20Reserved GDT blocks: 127 21Blocks per group: 8192 22Fragments per group: 8192 23Inodes per group: 512 24Inode blocks per group: 128 25Flex block group size: 16 26Mount count: 0 27Check interval: 15552000 (6 months) 28Reserved blocks uid: 0 29Reserved blocks gid: 0 30First inode: 11 31Inode size: 256 32Required extra isize: 32 33Desired extra isize: 32 34Journal inode: 8 35Default directory hash: half_md4 36Journal backup: inode blocks 37Checksum type: crc32c 38Journal features: (none) 39Total journal size: 1024k 40Total journal blocks: 1024 41Max transaction length: 1024 42Fast commit length: 0 43Journal sequence: 0x00000001 44Journal start: 0 45 46 47Group 0: (Blocks 1-8192) 48 Primary superblock at 1, Group descriptors at 2-2 49 Reserved GDT blocks at 3-129 50 Block bitmap at 130 (+129) 51 Inode bitmap at 132 (+131) 52 Inode table at 134-261 (+133) 53 7748 free blocks, 493 free inodes, 4 directories, 493 unused inodes 54 Free blocks: 445-8192 55 Free inodes: 20-512 56Group 1: (Blocks 8193-16383) [INODE_UNINIT] 57 Backup superblock at 8193, Group descriptors at 8194-8194 58 Reserved GDT blocks at 8195-8321 59 Block bitmap at 131 (bg #0 + 130) 60 Inode bitmap at 133 (bg #0 + 132) 61 Inode table at 262-389 (bg #0 + 261) 62 7038 free blocks, 512 free inodes, 0 directories, 512 unused inodes 63 Free blocks: 9346-16383 64 Free inodes: 513-1024 65debugfs: stat /emptyfile 66Inode: III Type: regular 67Size: 0 68Fragment: Address: 0 Number: 0 Size: 0 69debugfs: stat /bigfile 70Inode: III Type: regular 71Size: 32768 72Fragment: Address: 0 Number: 0 Size: 0 73debugfs: stat /sparsefile 74Inode: III Type: regular 75Size: 1073741825 76Fragment: Address: 0 Number: 0 Size: 0 77debugfs: stat /bigzerofile 78Inode: III Type: regular 79Size: 1073741825 80Fragment: Address: 0 Number: 0 Size: 0 81debugfs: stat /fifo 82debugfs: stat /emptydir 83Inode: III Type: directory 84Size: 1024 85Fragment: Address: 0 Number: 0 Size: 0 86debugfs: stat /dir 87Inode: III Type: directory 88Size: 1024 89Fragment: Address: 0 Number: 0 Size: 0 90debugfs: stat /dir/file 91Inode: III Type: regular 92Size: 8 93Fragment: Address: 0 Number: 0 Size: 0 94debugfs: ex /emptyfile 95Level Entries Logical Physical Length Flags 96debugfs: ex /bigfile 97Level Entries Logical Physical Length Flags 98X 0/0 1/1 0-31 AAA-BBB 32 99debugfs: ex /sparsefile 100Level Entries Logical Physical Length Flags 101Y 0/1 1/1 1-1048576 AAA 1048576 102X 1/1 1/5 1-1 AAA-BBB 1 103X 1/1 2/5 512-512 AAA-BBB 1 104X 1/1 3/5 1024-1024 AAA-BBB 1 105X 1/1 4/5 524288-524288 AAA-BBB 1 106X 1/1 5/5 1048576-1048576 AAA-BBB 1 107debugfs: ex /bigzerofile 108Level Entries Logical Physical Length Flags 109debugfs: ex /dir 110Level Entries Logical Physical Length Flags 111X 0/0 1/1 0-0 AAA-BBB 1 112debugfs: ex /dir/file 113Level Entries Logical Physical Length Flags 114X 0/0 1/1 0-0 AAA-BBB 1 115Pass 1: Checking inodes, blocks, and sizes 116Pass 2: Checking directory structure 117Pass 3: Checking directory connectivity 118Pass 4: Checking reference counts 119Pass 5: Checking group summary information 120test.img: 19/1024 files (0.0% non-contiguous), 1598/16384 blocks 121