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List:       linux-ext4
Subject:    Re: same ext4 file system corruption on different machines
From:       Theodore Ts'o <tytso () mit ! edu>
Date:       2014-01-31 3:00:28
Message-ID: 20140131030028.GB7118 () thunk ! org
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On Thu, Jan 30, 2014 at 08:59:09AM +0100, Luca Ognibene wrote:
> Yes it's indeed very strange.. i tend to rule out application errors
> because i don't write directly to the device so i don't think i can
> break a filesystem from userspace. I've checked previous and next blocks
> and they seem ok, only the block 524320 is getting corrupted. Any idea
> on what should i look for now?

Are you willing to try 3.12.9 or 3.13.1 upstream kernel?  Let's see if
changing the kernel makes any difference.  I don't recall any ext4
problems like this, but maybe it's device driver problem.

The other thing I'd ask is whether you can swap out the hard drive
interface --- can you use a USB 3.0 attached drive, or something like
that?

One final thing that you could try doing, depending on how
easily/quickly you can reproduce the problem, is to use blktrace and
see if you can catch who or what is writing to that specific block
which is getting corrupted.

						- Ted
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