linux-ext4 - Re: Restoring filenames from partly damaged ext4-filesystem

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Message-ID: <4F351E7A.2070005@fastmail.fm>
Date:	Fri, 10 Feb 2012 14:41:14 +0100
From:	Bernd Schubert <bernd.schubert@...tmail.fm>
To:	Rudolf Zran <rudolfzran@...oo.com>
CC:	Andreas Dilger <adilger@...ger.ca>,
	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>,
	"debian-user@...ts.debian.org" <debian-user@...ts.debian.org>
Subject: Re: Restoring filenames from partly damaged ext4-filesystem

On 02/09/2012 10:22 PM, Rudolf Zran wrote:
> Hello Andreas!
>
>
> [ext4 partition overwritten with garbage at the beginning]
>
>
>>>   * photorec from the testdisk package recoveres, luckily!, about 500GB of
>>>     data. Though the content seems to be pretty reasonable, no filenames
>>>     are recovered, since photorec operates without using filesystem
>>>    knowledge.
>>>
>>>   Do you see any chances (besides consulting professional recovery companies)
>>>   getting the filenames back?
>>
>> There was an ext3grep tool that some people had success with, but when I
>> looked at it, it was still fairly complex to use.
>
> Thanks for the hint, but the problem with ext3grep is that it seems to
> rely on an intact filesystem structure. It even has no option to set
> another superblock besides the default one and fails with all commands
> I tried ( see https://pzt.me/8q6k ).
>

I have written some tools in the past to recover the file structure of 
an over-formated ext3/ext4 device based on directory blocks.
With some tweaks it should be able to assign the file#inode_numbers in 
lost+found to a directory structure.
Problem is that I'm rather busy with too many other projects already. Do 
you know C and could you add some code on your own for the lost+found 
assignment? I can assist you, but it is unlikely that I find much time 
do it myself...


Cheers,
Bernd

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