Re: Recovering data from an ext4 on LVM

[Nuno Magalhães <nunomagalhaes@eu.ipp.pt>]

On Sun, Feb 2, 2014 at 3:38 PM, Ralf Mardorf <ralf.mardorf@alice-dsl.net> wrote:
> Search for a live media including ext4magic. Keep in mind to mount read
> only.

I've been either trying to recover unmounted; or mounting readonly, yes.
Not much success in finding a recovery distro with ext4magic, maybe
there'll be other tools in them.

I believe the thousands of multiply-claimed blocks fsck complains
about may be responsible for the awkward results photorec is
producing: hundreds of 1KB text files, which are mostly bits of whole
files, some incremental. Either that of LVM's PEs, i'm no expert.

And i believe what caused this was abusing the filesystem. The vm
which mounted the partition was set do destroy on host shutdown. The
partition wasn't marked for checking by fsck on boot and all dmesg
does is produce warnings, nothing that would stop the boot process. I
didn't re/boot the host that often but i did a few times - more than
enough to corrupt the filesystem over and over again (although that
would mostly "just" affect the FAT and not the files themselves?).

So i guess i should be happy with whichever crums photorec produces.

Cheers,
Nuno

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