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