Re: [Moosefs-users] moosefs losing chunks

[Elliot F. <efi...@gm...>]

On Thu, Dec 22, 2011 at 3:11 AM, Chris Picton <ch...@ec...> wrote:
>
> In my case, I had subsequently done a mfscheckfile recursively on my
> entire filesystem, and noted the files with 0 chunks
>
> I ran a mfsfilerepair on those (not checking my messages file too
> closely, and expecting the blocks to be zeroed out). My vms booted
> correctly, and after running a forced fsck and rpm -Va, no errors were
> detected.
>
> I am assuming I had the same scenario as you, where the previous chunk
> version was restored, instead of being zeroed out (or by a large
> coincidence, all failed chunks had not yet been allocated in the VM
> disks yet)

I went through the EXACT same scenario.  All VM images had one missing
block.  I did a mfsfilerepair on all of them.  They all made it
through a fsck with flying colors.  They all started and ran.  Over a
month later, when the OS (FreeBSD) actually tried to access that
block, things went berserk.  Long story short, I ended up recovering
that VM from backups.

Elliot