debugfs question

[Yamin, Yossi]

Thanks Andreas,

I have a problem that for the file data I need the fs MetaData is
corrupted.

I hope that because I am using same pre allocate logic all over my FS
then I can get the Maping from other clear state FS file

And read the data directly from the corrupted FS.

Is that making sense?  

 

Thanks,

Yossi

 

-----Original Message-----
From: Andreas.Dilger at sun.com [mailto:Andreas.Dilger at sun.com] On Behalf
Of Andreas Dilger
Sent: Wednesday, July 02, 2008 10:29 AM
To: Yamin, Yossi
Cc: ext3-users at redhat.com; tytso at mit.edu
Subject: Re: debugfs question

 

On Jun 28, 2008  23:50 +0300, Yamin, Yossi wrote:

> I am trying to read a file directly from the disk using debugfs
utility.

> 

> I am running "stat" on the file I want, filter out IND and Bind
blocks,

> and then copy the data blocks using dd directly from the Disk.

> 

> On small files it work'd (13MB).

> 

> On big files (3.5 , 440 GB)  the size is the same but md5sum get
differ.

> 

> What am I doing wrong?

 

What you are doing wrong is that you aren't using the debugfs "dump"

command, which will do what you are trying to do.

 

 

Cheers, Andreas

--

Andreas Dilger

Sr. Staff Engineer, Lustre Group

Sun Microsystems of Canada, Inc

 

.

 

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