From mboxrd@z Thu Jan  1 00:00:00 1970
From: Kent Overstreet <kmo-PEzghdH756F8UrSeD/g0lQ@public.gmane.org>
Subject: Re: Bcache causes data lose.
Date: Thu, 7 Nov 2013 12:22:11 -0800
Message-ID: <20131107202211.GG3842@kmo>
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To: Yuxuan Shui <yshuiv7-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
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On Thu, Nov 07, 2013 at 10:39:39AM +0000, Yuxuan Shui wrote:
> Hi,
> 
> I'm trying bcache for the past two days. And I observed several data
> corruptions.
> 
> This happens with both writeback and writethrough cache. After reboot,
> I saw my filesystem corrupted. With writeback cache, there's no way to
> recover it. With writethrough cache, after I detach the backing device
> from the cache set, I can mount my filesystem again. So I think this
> is cleanly a bcache bug.
> 
> I don't know if above information is enough, if you need to anything,
> I'll do my best to provide

That's not good :/ Can you tell me everything that's in your setup? md/lvm/what
drivers you're using for your drives/anything else that might be relevant...