Subject: Re: [vserver] Possible Hashify Corruption
From: "Michael S. Zick" <mszick@morethan.org>
Date: Wed, 20 Oct 2010 13:54:19 -0500

On Sun October 17 2010, Gordan Bobic wrote:
> On 17/10/2010 14:54, Michael S. Zick wrote:
> > On Sat October 16 2010, Gordan Bobic wrote:
> >> Hi,
> >>
> >>
> >> Can anybody hazard a guess as to what happened here? I'm prepared to
> >> consider any theory at the moment, no matter how far fetched.
> >>
> >> I'm running 2.6.30.10-vs2.3.0.36.14-pre8. The file system is ext4
> >> without journal and in data=writeback mode.
> >>
> >
> > Lets go with your first guess, file corruption, and speculate a bit...
> >
> > We know that ext4 gets its speed by the high degree of meta-data and
> > data catching that it uses.
> > We know that if ext4 is not cleanly shut down, your file system is
> > burnt toast.
> > On any type of system.
> 
> That is, in my experience, superstition. 
>

Well, your testing narrowed down that one -

I must have been using one of the affected kernel versions when ext4
scrambled 1Tbyte of files for me.  ;-)

It was a copy of Fedora-11, but I don't recall which kernel version.

Mike