sudo tune2fs -l /dev/mapper/raid-backup
tune2fs 1.42.6 (21-Sep-2012)
Filesystem volume name: <none>
Last mounted on: /raid/backup
Filesystem UUID: ad418c10-1e8c-4da3-8b2a-14ac54b48e7d
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
https://bugzilla.novell.com/show_bug.cgi?id=866283
https://bugzilla.novell.com/show_bug.cgi?id=866283#c1
--- Comment #1 from Martin Schröder 2014-02-28 14:05:12 CET ---
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: 22937600
Block count: 91750400
Reserved block count: 65536
Free blocks: 10376362
Free inodes: 14269104
First block: 0
Block size: 4096
Fragment size: 4096
Reserved GDT blocks: 1002
Blocks per group: 32768
Fragments per group: 32768
Inodes per group: 8192
Inode blocks per group: 512
RAID stride: 32
RAID stripe width: 64
Flex block group size: 16
Filesystem created: Thu Aug 4 18:36:22 2011
Last mount time: Fri Feb 28 13:52:52 2014
Last write time: Fri Feb 28 13:52:52 2014
Mount count: 14
Maximum mount count: 28
Last checked: Mon Aug 12 18:09:09 2013
Check interval: 15552000 (6 months)
Next check after: Sat Feb 8 17:09:09 2014
Lifetime writes: 1407 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: a6fe6b01-4127-4012-8473-51af744bd4d9
Journal backup: inode blocks
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