Identify Superblock

Identify Superblock

[Markus Hiereth]

Hello,

as YaST and fdisk showed different output for the partions of my
hard-disk, I got confused and lost the correct start point for my
partition /dev/hda5.

Recreation of superblocks by reiserfsck --rebuild-sb creates a
superblock, but afterwards, --rebuild-tree terminates with a message
that no metadata can be found. 

Now I am trying to find out which of the blocks is the superblock. I
made first attempts with
a) copying using the command dd and then
b) use of grep ReIsEr2Fs as search string on blocks of 4096 bytes.

Techical background information
 reiserfs: 3.6.9
 Kernel: 2.4.21
 Hard disk: Maxtor 9084006
 
Is this a possible approach?

Thanks for Your help
Markus Hiereth

Braunschweig, Germany

Re: Identify Superblock

[Vitaly Fertman]

On Thursday 22 September 2005 05:11, Markus Hiereth wrote:
> Hello,
> 
> as YaST and fdisk showed different output for the partions of my
> hard-disk, I got confused and lost the correct start point for my
> partition /dev/hda5.
> 
> Recreation of superblocks by reiserfsck --rebuild-sb creates a
> superblock, but afterwards, --rebuild-tree terminates with a message
> that no metadata can be found. 
> 
> Now I am trying to find out which of the blocks is the superblock. I
> made first attempts with
> a) copying using the command dd and then
> b) use of grep ReIsEr2Fs as search string on blocks of 4096 bytes.
> 
> Techical background information
>  reiserfs: 3.6.9
>  Kernel: 2.4.21
>  Hard disk: Maxtor 9084006
>  
> Is this a possible approach?

yes, although there are many SB copies in the journal area.
the magic string of the correct SB is on 64K + 52 bytes offset. 
if you need our assistance here please visit:
www.namesys.com/support.html

> Thanks for Your help
> Markus Hiereth
> 
> Braunschweig, Germany
> 
> 

-- 
Thanks,
Vitaly Fertman