Amos Shapira <[email protected]> writes:
> On 16 June 2010 16:26, Daniel Pittman <[email protected]> wrote:
>
>> LVM, by default, is a boring old linear mapping, so he probably has two disks
>> worth of data ... starting a third (or whatever) of the way through the file
>> system. So, no superblock on whatever.
>
> Why no superblock? The ext3 filesystem (and I guess the most usual suspects)
> write multiple copies of the superblock across the entire data partition
> just for such cases.
Actually, they do. My mistake.
[...]
>>> I can think of what I'd write to try and recover -something- but it'd
>>> involve writing a whole lot of rather hairy looking filesystem-scraping
>>> code. I'm sure there are tools to do this kind of partial data recovery
>>> but they're bound to be -very- expensive.
>>
>> The 'testdisk' package available in Debian, and fully OSS, can do quite a lot
>> of data recovery without a file system. It just block-scrapes the device.
>
> Right. I used it a couple of times and can tell that without file names it's
> a chore to wade through all the data and try to find which is important and
> which isn't. "file" is handy to do that (as in, e.g., run "find ...| xargs
> file | grep ..." and move all files of each type to their own directories).
No question there. Thankfully, my only use for it has been recovering photos,
and those have nice internal meta-data to help with the process. :)
Daniel
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