Re: PROBLEM: #89121 BTRFS mixes up mounted devices with their snapshots

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On 12/1/2014 4:45 PM, Konstantin wrote:
> The bug appears also when using mdadm RAID1 - when one of the
> drives is detached from the array then the OS discovers it and
> after a while (not directly, it takes several minutes) it appears
> under /proc/mounts: instead of /dev/md0p1 I see there /dev/sdb1.
> And usually after some hour or so (depending on system workload)
> the PC completely freezes. So discussion about the uniqueness of
> UUIDs or not, a crashing kernel is telling me that there is a
> serious bug.

I'm guessing you are using metadata format 0.9 or 1.0, which put the
metadata at the end of the drive and the filesystem still starts in
sector zero.  1.2 is now the default and would not have this problem
as its metadata is at the start of the disk ( well, 4k from the start
) and the fs starts further down.



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