Hi,
Below is the output from "tune4fs". From what people are saying it looks
like et4 may not be the way to go.
[root@sraid3 ~]# tune4fs -l /dev/sdb
tune4fs 1.41.9 (22-Aug-2009)
Filesystem volume name: <none>
Last mounted on: /sraid3/sraid3
Filesystem UUID: adc08889-f6a9-47c6-a570-e51c480240a3
Filesystem magic number: 0xEF53
Filesystem revision #: 1 (dynamic)
Filesystem features: ext_attr resize_inode dir_index filetype
sparse_super large_file
Filesystem flags: signed_directory_hash
Default mount options: (none)
Filesystem state: not clean
Errors behavior: Continue
Filesystem OS type: Linux
Inode count: 731381760
Block count: 2925527040
Reserved block count: 146276352
Free blocks: 499285087
Free inodes: 730894437
First block: 0
Block size: 4096
Fragment size: 4096
Reserved GDT blocks: 326
Blocks per group: 32768
Fragments per group: 32768
Inodes per group: 8192
Inode blocks per group: 512
Filesystem created: Wed Feb 10 14:49:46 2010
Last mount time: Fri Oct 1 18:49:29 2010
Last write time: Mon Oct 4 01:32:34 2010
Mount count: 3
Maximum mount count: 37
Last checked: Mon Jun 7 15:51:57 2010
Check interval: 15552000 (6 months)
Next check after: Sat Dec 4 14:51:57 2010
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: 78a52c1a-0e24-4e94-b1dc-e193e7cac68d
On Mon, 4 Oct 2010, Miguel Medalha wrote:
>
> Can you give us the output of "tune4fs -l /dev/sdb" ?
>
> Does it show " has_journal" under "Filesystem features"?
>
> If it doesn't, you can input the following:
>
> tune4fs -o journal_data
>
> The option "journal_data" fits the case in which you don't care about the
> fastest speed but you put your focus on data integrity instead.
>
> By the way, if you only used the defaults when creating the ext4 filesystems,
> I am afraid that you didn't use the ext4 specific features that give it a
> real advantage over ext3. Some of them cannot be configured latter, they have
> to be specified when you create the filesystem.
>
>
Steve
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