# tune2fs -l /dev/sda2
tune2fs 1.41.11 (14-Mar-2010)
Filesystem volume name:   root
Last mounted on:          /
Filesystem UUID:          5e7d8096-4110-46e2-a96f-90e789de64b3
Filesystem magic number:  0xEF53
Filesystem revision #:    1 (dynamic)
Filesystem features:      has_journal ext_attr resize_inode dir_index filetype needs_recovery extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize
Filesystem flags:         signed_directory_hash
Default mount options:    (none)
Filesystem state:         clean
Errors behavior:          Continue
Filesystem OS type:       Linux
Inode count:              656640
Block count:              2621440
Reserved block count:     131078
Free blocks:              1623488
Free inodes:              509687
First block:              0
Block size:               4096
Fragment size:            4096
Reserved GDT blocks:      639
Blocks per group:         32768
Fragments per group:      32768
Inodes per group:         8208
Inode blocks per group:   513
RAID stride:              32
RAID stripe width:        32
Flex block group size:    16
Filesystem created:       Tue Jun  5 18:09:52 2012
Last mount time:          Wed Jun  6 00:05:01 2012
Last write time:          Tue Jun  5 18:39:02 2012
Mount count:              11
Maximum mount count:      27
Last checked:             Tue Jun  5 18:09:52 2012
Check interval:           15552000 (6 months)
Next check after:         Sun Dec  2 17:09:52 2012
Lifetime writes:          10 GB
Reserved blocks uid:      0 (user root)
Reserved blocks gid:      0 (group root)
First inode:              11
Inode size:               256
Required extra isize:     28
Desired extra isize:      28
Journal inode:            8
Default directory hash:   half_md4
Directory Hash Seed:      bad69077-b3e8-4bd4-be05-069451b5b5b8
Journal backup:           inode blocks