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Re: Recovering an EXT3 FS - hopeless if inode list is overwritten?

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From Tim Watts <tw_usenet@dionic.net>
Newsgroups comp.os.linux.misc
Subject Re: Recovering an EXT3 FS - hopeless if inode list is overwritten?
Date Fri, 22 May 2015 09:24:56 +0100
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On 22/05/15 09:05, Charles T. Smith wrote:
> I'm trying to recover an ext3 fs I blew away by dd(1)-ing to a flash
> drive - but the device name got changed under me  :(
>
> When I look at the alternate superblocks, it looks like the inode list
> starts at the 11th block of the fs...
>
> Is it safe to say that if I overwrite the beginning of a very large
> filesystem, there's no way to recover any of the data, because the inodes
> will likely all be gone?
>
> Or, is there also a redundant copy of the inode list somewhere?

I think the inode table only has one copy.

There are multiple superblocks at intervals and recovering a copy of one 
of those might be worth a try - but I suspect you've blown the inode 
table away:

https://ext4.wiki.kernel.org/index.php/Ext4_Disk_Layout#Layout

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Recovering an EXT3 FS - hopeless if inode list is overwritten? "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2015-05-22 08:05 +0000
  Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? Tim Watts <tw_usenet@dionic.net> - 2015-05-22 09:24 +0100
  Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? Michael Baeuerle <michael.baeuerle@stz-e.de> - 2015-05-22 08:38 +0000
    Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2015-05-22 09:58 +0000
    Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2015-07-12 12:54 +0000
      Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2015-07-12 12:47 -0400
        Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2015-07-13 07:40 +0000
          Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2015-07-13 14:30 -0400
      Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? Michael Baeuerle <michael.baeuerle@stz-e.de> - 2015-07-13 11:41 +0000
        Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2015-07-13 20:37 +0000
          Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2015-07-14 07:55 +0000
          Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? Michael Baeuerle <michael.baeuerle@stz-e.de> - 2015-07-14 14:35 +0000
            Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2015-07-14 15:20 +0000
  Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? Vilmos Soti <vilmos@soti.ca> - 2015-05-22 10:53 -0700
    Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2015-05-23 08:25 +0000
    Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? Unknown <dog@gmail.com> - 2015-05-25 06:40 +0000
  Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? lakshmi <lakshmipathi.g@gmail.com> - 2015-05-25 22:06 -0700
    Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? Jean-David Beyer <jeandavid8@verizon.net> - 2015-05-26 09:57 -0400
      Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? Robert Riches <spamtrap42@jacob21819.net> - 2015-05-27 02:58 +0000
        Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2015-06-04 06:17 +0000
          Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-06-04 18:44 +0000

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