Re: "WARNING: Wrong master super block magic" message on boot only

[Alex Zarochentsev <zam@namesys.com>]

Hi,

On Fri, Sep 10, 2004 at 08:26:23PM -0700, Dave Thomas wrote:
> I am setting up a new test server with Reiser4 and I have noticed an
> error in 'dmesg' when mounting my Reiser4 partition on boot. This is
> the error:
> 
> "reiser4[mount(1956)]: _init_read_super
> (fs/reiser4/init_super.c:198)[nikita-2608]:
> WARNING: Wrong master super block magic."
> 
> This message only shows up on boot...if I unmount the partition then
> mount it again I do not get that error. I ran a 'fsck' on the
> partition and everything looked OK...output is at end of message. I
> have re-run 'mkfs.reiser4' on the partition but this did not stop the
> 'warning' message on boot.

do you mean that the system could not mount reiser4 volume at boot time?
or it was only reiser4 warning?

> 
> I am running Gentoo Linux with gentoo-dev-sources 2.6.8 with
> reiser4progs-1.0.1. The Reiser4 partition is a 200GB partition on a
> software raid mirror.
> 
> Thanks for any help on this,
> Dave
> 
> Fscking the /dev/md2 block device.

I can only guess that software raid was not started at the moment of first
attempt to mount it.  Do other fs work well with the same device?

> Will check the consistency of the Reiser4 SuperBlock.
> Will check the consistency of the Reiser4 FileSystem.
> Continue?
> (Yes/No): yes
> ***** fsck.reiser4 started at Fri Sep 10 13:15:31 2004
> Reiser4 journal (journal40) on /dev/md2: 0 transactions replayed of
> the total 0 blocks.
> Reiser4 fs was detected on /dev/md2.
> Master super block (16):
> magic:          ReIsEr4
> blksize:        4096
> format:         0x0 (format40)
> uuid:           ab01dab7-e10f-400d-8d1a-7a0000000000
> label:          <none>
> 
> Format super block (17):
> plugin:         format40
> description:    Disk-format for reiser4, ver. 1.0.1
> magic:          ReIsEr40FoRmAt
> flushes:        0
> mkfs id:        0x3463fc54
> blocks:         50654928
> free blocks:    50653339
> root block:     23
> tail policy:    0x2 (smart)
> next oid:       0x10000
> file count:     0
> tree height:    2
> key policy:     LARGE
> 
> 
> CHECKING STORAGE TREE
>         Read nodes 2
>         Nodes left in the tree 2
>                 Leaves of them 1, Twigs of them 1
>         Time interval: Fri Sep 10 13:15:43 2004 - Fri Sep 10 13:15:43 2004
> CHECKING EXTENT REGIONS.
>         Read twigs 1
>         Time interval: Fri Sep 10 13:15:43 2004 - Fri Sep 10 13:15:43 2004
> CHECKING SEMANTIC TREE
>         Found 1 objects.
>         Time interval: Fri Sep 10 13:15:43 2004 - Fri Sep 10 13:15:43 2004
> ***** fsck.reiser4 finished at Fri Sep 10 13:15:43 2004
> Closing fs...done
> 
> FS is consistent.

-- 
Alex.