tune2fs -l /dev/sda1

tune2fs 1.42.1 (17-Feb-2012)
Filesystem volume name:   HTPC
Last mounted on:          /mnt/funtoo
Filesystem UUID:          892c28af-fd7a-4347-a9d5-979132293f32
Filesystem magic number:  0xEF53
Filesystem revision #:    1 (dynamic)
Filesystem features:      ext_attr resize_inode dir_index filetype extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize
Filesystem flags:         signed_directory_hash
Default mount options:    journal_data_writeback user_xattr acl
Filesystem state:         not clean
Errors behavior:          Continue
Filesystem OS type:       Linux
Inode count:              899360
Block count:              3592527
Reserved block count:     179626
Free blocks:              2470624
Free inodes:              605484
First block:              0
Block size:               4096
Fragment size:            4096
Reserved GDT blocks:      877
Blocks per group:         32768
Fragments per group:      32768
Inodes per group:         8176
Inode blocks per group:   511
Flex block group size:    16
Filesystem created:       Sat Apr  7 14:55:54 2012
Last mount time:          Tue Apr 10 13:03:38 2012
Last write time:          Tue Apr 10 13:04:04 2012
Mount count:              2
Maximum mount count:      -1
Last checked:             Tue Apr 10 12:55:58 2012
Check interval:           0 (<none>)
Lifetime writes:          20 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
Default directory hash:   half_md4
Directory Hash Seed:      bec84c0d-2361-4cc8-9b96-97ffbd6bf478
Journal backup:           inode blocks