On Tue, Aug 25, 2015 at 11:59 AM, Austin S Hemmelgarn
<ahferro...@gmail.com> wrote:
> On 2015-08-25 12:39, Chris Murphy wrote:

>> The one problem case I still have with the latest versions is multiple
>> device Btrfs volume UUID doesn't exist when 1 or more devices are
>> missing.
>
> I've seen this myself, but only sometimes.  Based on my own testing, it only
> seems to happen when one of the disks with a system chunk on it is missing
> (for example, in a 3 device raid1 setup, one of the disks won't have a
> system chunk on it, and if disk goes missing, I can still mount by UUID
> fine).

I'm virtually certain I've reproduced this with a 2 disk raid1, both
should have system chunks. Separately, it seems to me that every disk
should have a copy of the system chunk, i.e. make it fixed as either
DUP on single or n-copies raid1 when on multiple devices. *shrug*



-- 
Chris Murphy
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