root@sun:/home/infinity# tune2fs -l /dev/sda1
tune2fs 1.42 (29-Nov-2011)
Filesystem volume name:   <none>
Last mounted on:          /
Filesystem UUID:          f5f2e1e9-22a7-46a6-8b65-453e2276b45c
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:              2199344
Block count:              8788736
Reserved block count:     439436
Free blocks:              6752631
Free inodes:              2055659
First block:              0
Block size:               4096
Fragment size:            4096
Reserved GDT blocks:      1021
Blocks per group:         32768
Fragments per group:      32768
Inodes per group:         8176
Inode blocks per group:   511
Flex block group size:    16
Filesystem created:       Wed Sep 15 12:14:24 2010
Last mount time:          Thu Oct 25 21:26:23 2012
Last write time:          Thu Oct 25 21:26:20 2012
Mount count:              1
Maximum mount count:      37
Last checked:             Thu Oct 25 21:26:20 2012
Check interval:           15552000 (6 months)
Next check after:         Tue Apr 23 21:26:20 2013
Lifetime writes:          239 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
First orphan inode:       392545
Default directory hash:   half_md4
Directory Hash Seed:      c24e5e2d-ab60-4e97-849c-9d53090b7cd4
Journal backup:           inode blocks