chris@hydrogen:/$ sudo dumpe2fs -h /dev/sde1
dumpe2fs 1.42.9 (4-Feb-2014)
Filesystem volume name:   <none>
Last mounted on:          <not available>
Filesystem UUID:          7ff1886d-7c36-4ba7-85c3-31047d76893a
Filesystem magic number:  0xEF53
Filesystem revision #:    1 (dynamic)
Filesystem features:      ext_attr resize_inode dir_index filetype extent flex_bg sparse_super huge_file uninit_bg dir_nlink extra_isize
Filesystem flags:         signed_directory_hash
Default mount options:    user_xattr acl
Filesystem state:         not clean
Errors behavior:          Continue
Filesystem OS type:       Linux
Inode count:              128
Block count:              1024
Reserved block count:     51
Free blocks:              986
Free inodes:              117
First block:              1
Block size:               1024
Fragment size:            1024
Reserved GDT blocks:      3
Blocks per group:         8192
Fragments per group:      8192
Inodes per group:         128
Inode blocks per group:   16
RAID stride:              4
RAID stripe width:        4
Flex block group size:    16
Filesystem created:       Mon May 11 10:05:35 2015
Last mount time:          Mon May 11 10:55:05 2015
Last write time:          Mon May 11 10:55:05 2015
Mount count:              3
Maximum mount count:      -1
Last checked:             Mon May 11 10:05:35 2015
Check interval:           0 (<none>)
Lifetime writes:          102 kB
Reserved blocks uid:      0 (user root)
Reserved blocks gid:      0 (group root)
First inode:              11
Inode size:               128
Default directory hash:   half_md4
Directory Hash Seed:      f5b8e828-bd2e-472d-87fd-13701754d378