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Filesystem volume name: <none>
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 huge_file dir_nlink extra_isize metadata_csum
Default mount options: (none)
Filesystem state: clean
Errors behavior: Continue
Filesystem OS type: Linux
Inode count: 1024
Block count: 16384
Reserved block count: 819
Overhead clusters: 1543
Free blocks: 14786
Free inodes: 1005
First block: 1
Block size: 1024
Fragment size: 1024
Group descriptor size: 64
Reserved GDT blocks: 127
Blocks per group: 8192
Fragments per group: 8192
Inodes per group: 512
Inode blocks per group: 128
Flex block group size: 16
Mount count: 0
Check interval: 15552000 (6 months)
Reserved blocks uid: 0
Reserved blocks gid: 0
First inode: 11
Inode size: 256
Required extra isize: 32
Desired extra isize: 32
Journal inode: 8
Default directory hash: half_md4
Journal backup: inode blocks
Checksum type: crc32c
Journal features: (none)
Total journal size: 1024k
Total journal blocks: 1024
Max transaction length: 1024
Fast commit length: 0
Journal sequence: 0x00000001
Journal start: 0
Group 0: (Blocks 1-8192)
Primary superblock at 1, Group descriptors at 2-2
Reserved GDT blocks at 3-129
Block bitmap at 130 (+129)
Inode bitmap at 132 (+131)
Inode table at 134-261 (+133)
7748 free blocks, 493 free inodes, 4 directories, 493 unused inodes
Free blocks: 445-8192
Free inodes: 20-512
Group 1: (Blocks 8193-16383) [INODE_UNINIT]
Backup superblock at 8193, Group descriptors at 8194-8194
Reserved GDT blocks at 8195-8321
Block bitmap at 131 (bg #0 + 130)
Inode bitmap at 133 (bg #0 + 132)
Inode table at 262-389 (bg #0 + 261)
7038 free blocks, 512 free inodes, 0 directories, 512 unused inodes
Free blocks: 9346-16383
Free inodes: 513-1024
debugfs: stat /emptyfile
Inode: III Type: regular
Size: 0
Fragment: Address: 0 Number: 0 Size: 0
debugfs: stat /bigfile
Inode: III Type: regular
Size: 32768
Fragment: Address: 0 Number: 0 Size: 0
debugfs: stat /sparsefile
Inode: III Type: regular
Size: 1073741825
Fragment: Address: 0 Number: 0 Size: 0
debugfs: stat /bigzerofile
Inode: III Type: regular
Size: 1073741825
Fragment: Address: 0 Number: 0 Size: 0
debugfs: stat /fifo
debugfs: stat /emptydir
Inode: III Type: directory
Size: 1024
Fragment: Address: 0 Number: 0 Size: 0
debugfs: stat /dir
Inode: III Type: directory
Size: 1024
Fragment: Address: 0 Number: 0 Size: 0
debugfs: stat /dir/file
Inode: III Type: regular
Size: 8
Fragment: Address: 0 Number: 0 Size: 0
debugfs: ex /emptyfile
Level Entries Logical Physical Length Flags
debugfs: ex /bigfile
Level Entries Logical Physical Length Flags
X 0/0 1/1 0-31 AAA-BBB 32
debugfs: ex /sparsefile
Level Entries Logical Physical Length Flags
Y 0/1 1/1 1-1048576 AAA 1048576
X 1/1 1/5 1-1 AAA-BBB 1
X 1/1 2/5 512-512 AAA-BBB 1
X 1/1 3/5 1024-1024 AAA-BBB 1
X 1/1 4/5 524288-524288 AAA-BBB 1
X 1/1 5/5 1048576-1048576 AAA-BBB 1
debugfs: ex /bigzerofile
Level Entries Logical Physical Length Flags
debugfs: ex /dir
Level Entries Logical Physical Length Flags
X 0/0 1/1 0-0 AAA-BBB 1
debugfs: ex /dir/file
Level Entries Logical Physical Length Flags
X 0/0 1/1 0-0 AAA-BBB 1
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
test.img: 19/1024 files (0.0% non-contiguous), 1598/16384 blocks
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