ogra@anubis:~/datengrab/images/snappy/unpack$ sudo tune2fs -l /dev/mapper/loop18p9
tune2fs 1.43.1 (08-Jun-2016)
Filesystem volume name:   writable
Last mounted on:          <not available>
Filesystem UUID:          56539eac-7e6c-4de9-92a4-f4d123ff6ee0
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 large_file huge_file dir_nlink extra_isize
Filesystem flags:         signed_directory_hash 
Default mount options:    user_xattr acl
Filesystem state:         clean
Errors behavior:          Continue
Filesystem OS type:       Linux
Inode count:              130560
Block count:              520776
Reserved block count:     26038
Free blocks:              152037
Free inodes:              130521
First block:              1
Block size:               1024
Fragment size:            1024
Group descriptor size:    64
Reserved GDT blocks:      256
Blocks per group:         8192
Fragments per group:      8192
Inodes per group:         2040
Inode blocks per group:   255
Flex block group size:    16
Filesystem created:       Fri Sep 23 08:30:49 2016
Last mount time:          n/a
Last write time:          Fri Sep 23 08:30:50 2016
Mount count:              0
Maximum mount count:      -1
Last checked:             Fri Sep 23 08:30:49 2016
Check interval:           0 (<none>)
Lifetime writes:          334 MB
Reserved blocks uid:      0 (user root)
Reserved blocks gid:      0 (group root)
First inode:              11
Inode size:	          128
Journal inode:            8
Default directory hash:   half_md4
Directory Hash Seed:      b9fd1ab6-ac05-452c-a22e-3769c2808a71
Journal backup:           inode blocks
ogra@anubis:~/datengrab/images/snappy/unpack$