Re: csum errors in VirtualBox VDI files

[Chris Murphy <lists@colorremedies.com>]

On Sat, Mar 26, 2016 at 2:28 PM, Chris Murphy <lists@colorremedies.com> wrote:
> On Sat, Mar 26, 2016 at 1:30 PM, Kai Krakow <hurikhan77@gmail.com> wrote:
>
>> Well, this time it hit me on the USB backup drive which uses no bcache
>> and no other fancy options except compress-force=zlib. Apparently, I've
>> only got a (real) screenshot which I'm going to link here:
>>
>> https://www.dropbox.com/s/9qbc7np23y8lrii/IMG_20160326_200033.jpg?dl=0
>
> This is a curious screen shot. It's a dracut pre-mount shell, so
> nothing should be mounted yet. And btrfs check only works on an
> unmounted file system. And yet the bottom part of the trace shows a
> Btrfs volume being made read only, as if it was mounted read write and
> is still mounted. Huh?

Wait. You said no bcache, and yet in this screen shot it shows 'btrfs
check /dev/bcache2 ...' right before the back trace.

This thread is confusing. You're talking about two different btrfs
volumes intermixed, one uses bcache the other doesn't, yet they both
have corruption. I think it's hardware related: bad cable bad ram bad
power, something.



-- 
Chris Murphy