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Date: Mon, 04 Jun 2012 15:03:06 +0200
From: Stefan Behrens <sbehrens@giantdisaster.de>
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To: Maxim Mikheev <mikhmv@gmail.com>
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Subject: Re: Help with recover data
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On Mon, 04 Jun 2012 08:26:43 -0400, Maxim Mikheev wrote:
> It was a kernel panic from btrfs.
> I had around 40 parallel processes of reading/writing.

Do you have a stack trace for this kernel panic, something with the term
"BUG", "WARNING" and/or "Call Trace" in /var/log/kern.log or
/var/log/syslog (or in the old /var/log/syslog.?.gz /var/log/kern.log.?.gz)?

And are the disks connected via USB or how?

Is there an MD, LVM or encryption layer below btrfs in your setup?

Was the filesystem almost full?