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 13Free blocks: 14786 14Free inodes: 1005 15First block: 1 16Block size: 1024 17Fragment size: 1024 18Group descriptor size: 64 19Reserved GDT blocks: 127 20Blocks per group: 8192 21Fragments per group: 8192 22Inodes per group: 512 23Inode blocks per group: 128 24Flex block group size: 16 25Mount count: 0 26Check interval: 15552000 (6 months) 27Reserved blocks uid: 0 28Reserved blocks gid: 0 29First inode: 11 30Inode size: 256 31Required extra isize: 32 32Desired extra isize: 32 33Journal inode: 8 34Default directory hash: half_md4 35Journal backup: inode blocks 36Checksum type: crc32c 37Journal features: (none) 38Journal size: 1024k 39Journal length: 1024 40Journal sequence: 0x00000001 41Journal start: 0 42 43 44Group 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 53Group 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 62debugfs: stat /emptyfile 63Inode: III Type: regular 64Size: 0 65Fragment: Address: 0 Number: 0 Size: 0 66debugfs: stat /bigfile 67Inode: III Type: regular 68Size: 32768 69Fragment: Address: 0 Number: 0 Size: 0 70debugfs: stat /sparsefile 71Inode: III Type: regular 72Size: 1073741825 73Fragment: Address: 0 Number: 0 Size: 0 74debugfs: stat /bigzerofile 75Inode: III Type: regular 76Size: 1073741825 77Fragment: Address: 0 Number: 0 Size: 0 78debugfs: stat /fifo 79debugfs: stat /emptydir 80Inode: III Type: directory 81Size: 1024 82Fragment: Address: 0 Number: 0 Size: 0 83debugfs: stat /dir 84Inode: III Type: directory 85Size: 1024 86Fragment: Address: 0 Number: 0 Size: 0 87debugfs: stat /dir/file 88Inode: III Type: regular 89Size: 8 90Fragment: Address: 0 Number: 0 Size: 0 91debugfs: ex /emptyfile 92Level Entries Logical Physical Length Flags 93debugfs: ex /bigfile 94Level Entries Logical Physical Length Flags 95X 0/0 1/1 0-31 AAA-BBB 32 96debugfs: ex /sparsefile 97Level Entries Logical Physical Length Flags 98Y 0/1 1/1 1-1048576 AAA 1048576 99X 1/1 1/5 1-1 AAA-BBB 1 100X 1/1 2/5 512-512 AAA-BBB 1 101X 1/1 3/5 1024-1024 AAA-BBB 1 102X 1/1 4/5 524288-524288 AAA-BBB 1 103X 1/1 5/5 1048576-1048576 AAA-BBB 1 104debugfs: ex /bigzerofile 105Level Entries Logical Physical Length Flags 106debugfs: ex /dir 107Level Entries Logical Physical Length Flags 108X 0/0 1/1 0-0 AAA-BBB 1 109debugfs: ex /dir/file 110Level Entries Logical Physical Length Flags 111X 0/0 1/1 0-0 AAA-BBB 1 112Pass 1: Checking inodes, blocks, and sizes 113Pass 2: Checking directory structure 114Pass 3: Checking directory connectivity 115Pass 4: Checking reference counts 116Pass 5: Checking group summary information 117test.img: 19/1024 files (0.0% non-contiguous), 1598/16384 blocks 118