Re: data corruption with 2.4.25 and datalogging patches

[Francisco Javier Cabello <fjcabello@visual-tools.com>]

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Yes. I have a sef of system with the same main board, memory, 
microprocessor... They are identical. The difference is the conditions where 
they are working. Perhaps the cpu load average is difference, the amount of 
data they are writting, the number of power failure...

I am going to send you the output of reiserfsck of some the systems.

Regards,

Paco

On Friday, 14 de July de 2006 13:48, Vladimir V. Saveliev wrote:
> Hello
>
> On Fri, 2006-07-14 at 10:25 +0200, Francisco Javier Cabello wrote:
> > Hello,
> > I am almost sure that unclean shutdowns happen in those systems. We have
> > tried to reproduce removing power each 5 minutes and the filesystem
> > wasn't suffering corruption. Perhaps it's related, but I don't know.
> >
> > I have talked about 'Datalogging patches' because it's the only thing
> > different from our system.
>
> sorry, I am confused. Am I correct that you have set of systems and they
> all run similar load on the same kernel and only ~10% of them encounter
> reiserfs corruptions? Do they have identical hardware?
>
> > I have searched a lot and  few people have
> > corruption with reiserfs standalone... so, it may be datalogging patches.
> >
> > what do you need from reiserfsck? I guess the output of 'reiserfsck
> > --check device'
>
> yes. There is -l option to redirect output to log file.
>
> > of perhaps you need the output of reiserfsck --rebuild tree.
> >
> >
> > Regards,
> >
> > Paco
> >
> > On Thursday, 13 de July de 2006 16:34, Vladimir V. Saveliev wrote:
> > > Hello
> > >
> > > On Wed, 2006-07-12 at 08:16 +0200, Francisco Javier Cabello wrote:
> > > > Hello,
> > > > My company develops video recorder system. Basically we work with
> > > > linux boxes running kernel 2.4.25. The system captures analogue
> > > > video,  and after processing and compressing, digital video is stored
> > > > to hard disk. We are recording continuously (24x7).
> > > >
> > > > We have realized that more or less a 10% of our systems are suffering
> > > > data corruption in the reiserfs partition.
> > >
> > > Did unclean shutdowns take place on those systems?
> > > If you let us see what does reiserfsck report in those cases that could
> > > help to understand what is is happening.
> > >
> > > > Sometimes it's possible to fix it
> > > > running 'reiserfsck --rebuild-tree' but not always.
> > > > More information:
> > > > -Kernel 2.4.25 + v4l2 patches
> > > > -Reiserfsprogs 3.6.19
> > > > -Datalogging patches.
> > > > (http://mirror.mcs.anl.gov/suse-people/mason/patches/data-logging/2.4
> > > >.25/ )
> > > >
> > > > I have checked datalogging patches from Reiserfs website and they
> > > > seem equal to suse ones.
> > > >
> > > > I don't have any idea of what it's happening. The disk bandwidth is
> > > > not so high (300-500kb/sec). The disk is always full at 90% (we have
> > > > a process deleting old video).
> > > >
> > > > I have been thinking about removing Dataloggin patches but I would
> > > > like to have serious reason. It's not easy to check that the problem
> > > > is solved because we are not able to reproduce the error in our
> > > > headquarter.
> > > >
> > > > Regards,
> > > >
> > > > Paco

-- 
One of my most productive days was throwing away 1000 lines of code (Ken 
Thompson)
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