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Re: [PLUG] Hard drive crash - recovery
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Quoting sean finney <seanius@seanius.net>:
> hi eric,
>
> On Wed, Sep 08, 2004 at 07:14:30PM -0400, eric@lucii.dnsalias.org wrote:
> > Can anybody point me to some useful sites and/or tools for trying to
> > recover this?
>
> of course, it goes without saying it's best to assume the data is
> permanently lost forever. that way, if you do get it back, it's
> a pleasant surprise :)
Agreed - although hope springs eternal :-P
> the first thing i would do if you can still dd off of the disk is
> retry with a program called dd_rescue. there's an option you can
> pass to tell it to fill in the output with zeros blocks that were
> unreadable in the input, which might be important to keep
> block offsets consistant (it'll probably still corrupt some
> inodes, but probably more likely to be successful). also, when it detects
> errors, it shrinks the default block size which hopefully will minimize
> and isolate the unreadable areas on the disk.
I'm downloading now - thanks!
> that failing, in the past i've the coroner's toolkit / lazarus to
> bring data back from the dead in similar situations (though this
> was admittedly with ext2/3, ymmv with reiserfs). be warned, you'll
Yes, reiserfs is a problem. I know, for example, that ext2/3 keeps
copies of a certain table at various locations so if the first one
gets munged it can be replaced with one of the later ones. I have
no such information for reiser yet.
> need a lot of time and disk space for that. in my particular
> situation, i used tct/lazarus to find the blocks where the files
> i wanted started, and then wrote a small c program to read the data[1].
>
>
> hth
> sean
Yes, thanks for the help!
Eric
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